First step to add multichannel capability to the GSM receiver. At this moment it might still contain debuging code. The training sequence number for non C0 channels is embedded in the code.
This commit is contained in:
ptrkrysik
parent
a25bb7030b
commit
58213797c1
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@ -25,6 +25,7 @@ cmake_minimum_required(VERSION 2.6)
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project(gr-gsm CXX C)
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enable_testing()
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#set(CMAKE_BUILD_TYPE "Debug")
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#select the release build type by default to get optimization flags
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if(NOT CMAKE_BUILD_TYPE)
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set(CMAKE_BUILD_TYPE "Release")
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@ -1,6 +1,6 @@
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<?xml version='1.0' encoding='ASCII'?>
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<flow_graph>
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<timestamp>Wed Aug 13 19:03:28 2014</timestamp>
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<timestamp>Thu Aug 21 20:40:28 2014</timestamp>
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<block>
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<key>options</key>
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<param>
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@ -209,6 +209,259 @@
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<value>0</value>
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</param>
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</block>
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<block>
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<key>gsm_get_bcch_or_ccch_bursts</key>
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<param>
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<key>id</key>
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<value>gsm_get_bcch_or_ccch_bursts_0</value>
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</param>
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<param>
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<key>_enabled</key>
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<value>True</value>
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</param>
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<param>
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<key>d_fn51_start</key>
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<value>2</value>
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</param>
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<param>
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<key>alias</key>
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<value></value>
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</param>
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<param>
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<key>affinity</key>
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<value></value>
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</param>
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<param>
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<key>minoutbuf</key>
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<value>0</value>
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</param>
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<param>
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<key>maxoutbuf</key>
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<value>0</value>
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</param>
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<param>
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<key>_coordinate</key>
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<value>(660, 243)</value>
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</param>
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<param>
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<key>_rotation</key>
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<value>0</value>
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</param>
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</block>
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<block>
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<key>blocks_tag_debug</key>
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<param>
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<key>id</key>
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<value>blocks_tag_debug_0</value>
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</param>
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<param>
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<key>_enabled</key>
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<value>False</value>
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</param>
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<param>
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<key>type</key>
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<value>complex</value>
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</param>
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<param>
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<key>name</key>
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<value></value>
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</param>
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<param>
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<key>filter</key>
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<value>""</value>
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</param>
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<param>
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<key>num_inputs</key>
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<value>1</value>
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</param>
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<param>
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<key>vlen</key>
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<value>1</value>
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</param>
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<param>
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<key>display</key>
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<value>True</value>
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</param>
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<param>
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<key>alias</key>
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<value></value>
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</param>
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<param>
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<key>affinity</key>
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<value></value>
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</param>
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<param>
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<key>_coordinate</key>
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<value>(456, 477)</value>
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</param>
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<param>
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<key>_rotation</key>
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<value>0</value>
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</param>
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</block>
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<block>
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<key>gsm_receiver_hier</key>
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<param>
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<key>id</key>
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<value>gsm_receiver_hier_0</value>
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</param>
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<param>
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<key>_enabled</key>
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<value>True</value>
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</param>
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<param>
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<key>input_rate</key>
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<value>samp_rate</value>
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</param>
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<param>
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<key>osr</key>
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<value>4</value>
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</param>
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<param>
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<key>arfcn</key>
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<value>0</value>
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</param>
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<param>
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<key>alias</key>
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<value></value>
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</param>
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<param>
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<key>affinity</key>
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<value></value>
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</param>
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<param>
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<key>minoutbuf</key>
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<value>0</value>
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</param>
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<param>
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<key>maxoutbuf</key>
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<value>0</value>
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</param>
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<param>
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<key>_coordinate</key>
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<value>(455, 244)</value>
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</param>
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<param>
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<key>_rotation</key>
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<value>0</value>
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</param>
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</block>
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<block>
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<key>gsm_control_channels_decoder</key>
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<param>
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<key>id</key>
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<value>gsm_control_channels_decoder_0</value>
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</param>
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<param>
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<key>_enabled</key>
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<value>True</value>
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</param>
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<param>
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<key>alias</key>
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<value></value>
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</param>
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<param>
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<key>affinity</key>
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<value></value>
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</param>
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<param>
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<key>minoutbuf</key>
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<value>0</value>
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</param>
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<param>
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<key>maxoutbuf</key>
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<value>0</value>
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</param>
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<param>
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<key>_coordinate</key>
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<value>(920, 247)</value>
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</param>
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<param>
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<key>_rotation</key>
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<value>0</value>
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</param>
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</block>
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<block>
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<key>gsm_message_printer</key>
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<param>
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<key>id</key>
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<value>gsm_message_printer_0</value>
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</param>
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<param>
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<key>_enabled</key>
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<value>False</value>
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</param>
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<param>
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<key>alias</key>
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<value></value>
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</param>
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<param>
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<key>affinity</key>
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<value></value>
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</param>
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<param>
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<key>_coordinate</key>
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<value>(1128, 169)</value>
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</param>
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<param>
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<key>_rotation</key>
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<value>0</value>
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</param>
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</block>
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<block>
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<key>gsm_message_printer</key>
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<param>
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<key>id</key>
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<value>gsm_message_printer_1</value>
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</param>
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<param>
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<key>_enabled</key>
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<value>True</value>
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</param>
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<param>
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<key>alias</key>
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<value></value>
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</param>
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<param>
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<key>affinity</key>
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<value></value>
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</param>
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<param>
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<key>_coordinate</key>
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<value>(1141, 247)</value>
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</param>
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<param>
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<key>_rotation</key>
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<value>0</value>
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</param>
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</block>
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<block>
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<key>blocks_message_debug</key>
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<param>
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<key>id</key>
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<value>blocks_message_debug_0</value>
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</param>
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<param>
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<key>_enabled</key>
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<value>True</value>
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</param>
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<param>
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<key>alias</key>
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<value></value>
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</param>
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<param>
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<key>affinity</key>
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<value></value>
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</param>
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<param>
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<key>_coordinate</key>
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<value>(240, 405)</value>
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</param>
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<param>
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<key>_rotation</key>
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<value>0</value>
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</param>
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</block>
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<block>
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<key>variable_qtgui_range</key>
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<param>
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@ -225,15 +478,15 @@
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</param>
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<param>
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<key>value</key>
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<value>0</value>
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<value>84</value>
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</param>
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<param>
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<key>start</key>
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<value>-50</value>
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<value>-100</value>
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</param>
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<param>
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<key>stop</key>
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<value>50</value>
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<value>100</value>
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</param>
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<param>
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<key>step</key>
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@ -268,6 +521,100 @@
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<value>0</value>
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</param>
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</block>
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<block>
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<key>gsm_clock_offset_control</key>
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<param>
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<key>id</key>
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<value>gsm_clock_offset_control_0</value>
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</param>
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<param>
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<key>_enabled</key>
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<value>True</value>
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</param>
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<param>
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<key>fc</key>
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<value>fc</value>
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</param>
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<param>
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<key>samp_rate</key>
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<value>samp_rate</value>
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</param>
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<param>
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<key>alias</key>
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<value></value>
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</param>
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<param>
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<key>affinity</key>
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<value></value>
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</param>
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<param>
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<key>minoutbuf</key>
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<value>0</value>
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</param>
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<param>
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<key>maxoutbuf</key>
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<value>0</value>
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</param>
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<param>
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<key>_coordinate</key>
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<value>(329, 155)</value>
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</param>
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<param>
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<key>_rotation</key>
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<value>180</value>
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</param>
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</block>
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<block>
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<key>clock_offset_corrector</key>
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<param>
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<key>id</key>
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<value>clock_offset_corrector_0</value>
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</param>
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<param>
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<key>_enabled</key>
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<value>True</value>
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</param>
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<param>
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<key>fc</key>
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<value>fc</value>
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</param>
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<param>
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<key>ppm</key>
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<value>0</value>
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</param>
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<param>
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<key>samp_rate_in</key>
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<value>samp_rate</value>
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</param>
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<param>
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<key>samp_rate_out</key>
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<value>samp_rate</value>
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</param>
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<param>
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<key>alias</key>
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<value></value>
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</param>
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<param>
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<key>affinity</key>
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<value></value>
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</param>
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<param>
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<key>minoutbuf</key>
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<value>0</value>
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</param>
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<param>
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<key>maxoutbuf</key>
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<value>0</value>
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</param>
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<param>
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<key>_coordinate</key>
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<value>(251, 236)</value>
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</param>
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<param>
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<key>_rotation</key>
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<value>0</value>
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</param>
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</block>
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<block>
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<key>rtlsdr_source</key>
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<param>
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@ -614,353 +961,6 @@
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<value>0</value>
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</param>
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</block>
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<block>
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<key>gsm_get_bcch_or_ccch_bursts</key>
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<param>
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<key>id</key>
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<value>gsm_get_bcch_or_ccch_bursts_0</value>
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</param>
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<param>
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<key>_enabled</key>
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<value>True</value>
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</param>
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<param>
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<key>d_fn51_start</key>
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<value>2</value>
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</param>
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<param>
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<key>alias</key>
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<value></value>
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</param>
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<param>
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<key>affinity</key>
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<value></value>
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</param>
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<param>
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<key>minoutbuf</key>
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<value>0</value>
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</param>
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<param>
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<key>maxoutbuf</key>
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<value>0</value>
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</param>
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<param>
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<key>_coordinate</key>
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<value>(660, 243)</value>
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</param>
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<param>
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<key>_rotation</key>
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||||
<value>0</value>
|
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</param>
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</block>
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<block>
|
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<key>gsm_clock_offset_control</key>
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<param>
|
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<key>id</key>
|
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<value>gsm_clock_offset_control_0</value>
|
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</param>
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<param>
|
||||
<key>_enabled</key>
|
||||
<value>True</value>
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||||
</param>
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||||
<param>
|
||||
<key>fc</key>
|
||||
<value>fc</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>samp_rate</key>
|
||||
<value>samp_rate</value>
|
||||
</param>
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||||
<param>
|
||||
<key>alias</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>affinity</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>minoutbuf</key>
|
||||
<value>0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>maxoutbuf</key>
|
||||
<value>0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_coordinate</key>
|
||||
<value>(329, 155)</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_rotation</key>
|
||||
<value>180</value>
|
||||
</param>
|
||||
</block>
|
||||
<block>
|
||||
<key>clock_offset_corrector</key>
|
||||
<param>
|
||||
<key>id</key>
|
||||
<value>clock_offset_corrector_0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_enabled</key>
|
||||
<value>True</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>fc</key>
|
||||
<value>fc</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>ppm</key>
|
||||
<value>0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>samp_rate_in</key>
|
||||
<value>samp_rate</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>samp_rate_out</key>
|
||||
<value>samp_rate</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>alias</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>affinity</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>minoutbuf</key>
|
||||
<value>0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>maxoutbuf</key>
|
||||
<value>0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_coordinate</key>
|
||||
<value>(251, 236)</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_rotation</key>
|
||||
<value>0</value>
|
||||
</param>
|
||||
</block>
|
||||
<block>
|
||||
<key>blocks_tag_debug</key>
|
||||
<param>
|
||||
<key>id</key>
|
||||
<value>blocks_tag_debug_0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_enabled</key>
|
||||
<value>False</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>type</key>
|
||||
<value>complex</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>name</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>filter</key>
|
||||
<value>""</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>num_inputs</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>vlen</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>display</key>
|
||||
<value>True</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>alias</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>affinity</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_coordinate</key>
|
||||
<value>(456, 477)</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_rotation</key>
|
||||
<value>0</value>
|
||||
</param>
|
||||
</block>
|
||||
<block>
|
||||
<key>gsm_receiver_hier</key>
|
||||
<param>
|
||||
<key>id</key>
|
||||
<value>gsm_receiver_hier_0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_enabled</key>
|
||||
<value>True</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>input_rate</key>
|
||||
<value>samp_rate</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>osr</key>
|
||||
<value>4</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>arfcn</key>
|
||||
<value>0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>alias</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>affinity</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>minoutbuf</key>
|
||||
<value>0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>maxoutbuf</key>
|
||||
<value>0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_coordinate</key>
|
||||
<value>(455, 244)</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_rotation</key>
|
||||
<value>0</value>
|
||||
</param>
|
||||
</block>
|
||||
<block>
|
||||
<key>blocks_message_debug</key>
|
||||
<param>
|
||||
<key>id</key>
|
||||
<value>blocks_message_debug_0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_enabled</key>
|
||||
<value>False</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>alias</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>affinity</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_coordinate</key>
|
||||
<value>(240, 406)</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_rotation</key>
|
||||
<value>0</value>
|
||||
</param>
|
||||
</block>
|
||||
<block>
|
||||
<key>gsm_control_channels_decoder</key>
|
||||
<param>
|
||||
<key>id</key>
|
||||
<value>gsm_control_channels_decoder_0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_enabled</key>
|
||||
<value>True</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>alias</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>affinity</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>minoutbuf</key>
|
||||
<value>0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>maxoutbuf</key>
|
||||
<value>0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_coordinate</key>
|
||||
<value>(920, 247)</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_rotation</key>
|
||||
<value>0</value>
|
||||
</param>
|
||||
</block>
|
||||
<block>
|
||||
<key>gsm_message_printer</key>
|
||||
<param>
|
||||
<key>id</key>
|
||||
<value>gsm_message_printer_0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_enabled</key>
|
||||
<value>False</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>alias</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>affinity</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_coordinate</key>
|
||||
<value>(1128, 169)</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_rotation</key>
|
||||
<value>0</value>
|
||||
</param>
|
||||
</block>
|
||||
<block>
|
||||
<key>gsm_message_printer</key>
|
||||
<param>
|
||||
<key>id</key>
|
||||
<value>gsm_message_printer_1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_enabled</key>
|
||||
<value>True</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>alias</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>affinity</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_coordinate</key>
|
||||
<value>(1141, 247)</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>_rotation</key>
|
||||
<value>0</value>
|
||||
</param>
|
||||
</block>
|
||||
<connection>
|
||||
<source_block_id>clock_offset_corrector_0</source_block_id>
|
||||
<sink_block_id>gsm_receiver_hier_0</sink_block_id>
|
||||
|
|
@ -973,12 +973,6 @@
|
|||
<source_key>0</source_key>
|
||||
<sink_key>0</sink_key>
|
||||
</connection>
|
||||
<connection>
|
||||
<source_block_id>clock_offset_corrector_0</source_block_id>
|
||||
<sink_block_id>qtgui_sink_x_0</sink_block_id>
|
||||
<source_key>0</source_key>
|
||||
<sink_key>0</sink_key>
|
||||
</connection>
|
||||
<connection>
|
||||
<source_block_id>gsm_get_bcch_or_ccch_bursts_0</source_block_id>
|
||||
<sink_block_id>gsm_control_channels_decoder_0</sink_block_id>
|
||||
|
|
@ -1003,6 +997,18 @@
|
|||
<source_key>msgs</source_key>
|
||||
<sink_key>msgs</sink_key>
|
||||
</connection>
|
||||
<connection>
|
||||
<source_block_id>gsm_control_channels_decoder_0</source_block_id>
|
||||
<sink_block_id>gsm_message_printer_1</sink_block_id>
|
||||
<source_key>msgs</source_key>
|
||||
<sink_key>msgs</sink_key>
|
||||
</connection>
|
||||
<connection>
|
||||
<source_block_id>gsm_clock_offset_control_0</source_block_id>
|
||||
<sink_block_id>blocks_message_debug_0</sink_block_id>
|
||||
<source_key>ppm</source_key>
|
||||
<sink_key>print</sink_key>
|
||||
</connection>
|
||||
<connection>
|
||||
<source_block_id>gsm_clock_offset_control_0</source_block_id>
|
||||
<sink_block_id>clock_offset_corrector_0</sink_block_id>
|
||||
|
|
@ -1016,15 +1022,9 @@
|
|||
<sink_key>0</sink_key>
|
||||
</connection>
|
||||
<connection>
|
||||
<source_block_id>gsm_receiver_hier_0</source_block_id>
|
||||
<sink_block_id>blocks_message_debug_0</sink_block_id>
|
||||
<source_key>measurements</source_key>
|
||||
<sink_key>print</sink_key>
|
||||
</connection>
|
||||
<connection>
|
||||
<source_block_id>gsm_control_channels_decoder_0</source_block_id>
|
||||
<sink_block_id>gsm_message_printer_1</sink_block_id>
|
||||
<source_key>msgs</source_key>
|
||||
<sink_key>msgs</sink_key>
|
||||
<source_block_id>rtlsdr_source_0</source_block_id>
|
||||
<sink_block_id>qtgui_sink_x_0</sink_block_id>
|
||||
<source_key>0</source_key>
|
||||
<sink_key>0</sink_key>
|
||||
</connection>
|
||||
</flow_graph>
|
||||
|
|
|
|||
|
|
@ -20,10 +20,20 @@
|
|||
<type>int</type>
|
||||
</param>
|
||||
|
||||
<param>
|
||||
<name>Num Streams</name>
|
||||
<key>num_streams</key>
|
||||
<value>1</value>
|
||||
<type>int</type>
|
||||
</param>
|
||||
<check>$num_streams >= 0</check>
|
||||
|
||||
<sink>
|
||||
<name>in</name>
|
||||
<type>complex</type>
|
||||
<nports>$num_streams</nports>
|
||||
</sink>
|
||||
|
||||
<source>
|
||||
<name>bursts</name>
|
||||
<type>message</type>
|
||||
|
|
|
|||
|
|
@ -37,7 +37,7 @@
|
|||
|
||||
#define MAX_SCH_ERRORS 10 //maximum number of subsequent sch errors after which gsm receiver goes to find_next_fcch state
|
||||
|
||||
typedef enum {empty, fcch_burst, sch_burst, normal_burst, rach_burst, dummy, dummy_or_normal} burst_type;
|
||||
typedef enum {empty, fcch_burst, sch_burst, normal_burst, rach_burst, dummy, dummy_or_normal, normal_or_noise} burst_type;
|
||||
typedef enum {unknown, multiframe_26, multiframe_51} multiframe_type;
|
||||
|
||||
static const unsigned char SYNC_BITS[] = {
|
||||
|
|
|
|||
|
|
@ -38,7 +38,9 @@
|
|||
#include <iomanip>
|
||||
#include <assert.h>
|
||||
#include <boost/scoped_ptr.hpp>
|
||||
//#include "plotting/plotting.hpp"
|
||||
|
||||
#include "plotting/plotting.hpp"
|
||||
#include <pthread.h>
|
||||
|
||||
#define SYNC_SEARCH_RANGE 30
|
||||
|
||||
|
|
@ -64,7 +66,7 @@ receiver::make(int osr, int arfcn)
|
|||
*/
|
||||
receiver_impl::receiver_impl(int osr, int arfcn)
|
||||
: gr::sync_block("receiver",
|
||||
gr::io_signature::make(1, 1, sizeof(gr_complex)),
|
||||
gr::io_signature::make(1, -1, sizeof(gr_complex)),
|
||||
gr::io_signature::make(0, 0, 0)),
|
||||
d_OSR(osr),
|
||||
d_chan_imp_length(CHAN_IMP_RESP_LENGTH),
|
||||
|
|
@ -104,7 +106,8 @@ receiver_impl::work(int noutput_items,
|
|||
gr_vector_const_void_star &input_items,
|
||||
gr_vector_void_star &output_items)
|
||||
{
|
||||
const gr_complex *input = (const gr_complex *) input_items[0];
|
||||
// std::vector<const gr_complex *> iii = (std::vector<const gr_complex *>) input_items; // jak zrobić to rzutowanie poprawnie
|
||||
gr_complex * input = (gr_complex *) input_items[0];
|
||||
std::vector<tag_t> freq_offset_tags;
|
||||
uint64_t start = nitems_read(0);
|
||||
uint64_t stop = start + noutput_items;
|
||||
|
|
@ -122,7 +125,6 @@ receiver_impl::work(int noutput_items,
|
|||
if(d_state == synchronized && b_type == fcch_burst){
|
||||
uint64_t last_sample_nr = ceil((GUARD_PERIOD + 2.0 * TAIL_BITS + 156.25) * d_OSR) + 1;
|
||||
if(tag_offset < last_sample_nr){
|
||||
DCOUT("Freq change inside FCCH burst!!!!!!!!!!!!!!");
|
||||
freq_offset_tag_in_fcch = true;
|
||||
}
|
||||
d_freq_offset_setting = pmt::to_double(freq_offset_tag.value);
|
||||
|
|
@ -134,9 +136,8 @@ receiver_impl::work(int noutput_items,
|
|||
switch (d_state)
|
||||
{
|
||||
//bootstrapping
|
||||
case fcch_search: //this state is used because it takes some time (a bunch of buffered samples)
|
||||
case fcch_search:
|
||||
{
|
||||
DCOUT("FCCH search");
|
||||
double freq_offset_tmp;
|
||||
if (find_fcch_burst(input, noutput_items,freq_offset_tmp))
|
||||
{
|
||||
|
|
@ -154,7 +155,6 @@ receiver_impl::work(int noutput_items,
|
|||
|
||||
case sch_search:
|
||||
{
|
||||
DCOUT("SCH search");
|
||||
vector_complex channel_imp_resp(CHAN_IMP_RESP_LENGTH*d_OSR);
|
||||
int t1, t2, t3;
|
||||
int burst_start = 0;
|
||||
|
|
@ -166,8 +166,6 @@ receiver_impl::work(int noutput_items,
|
|||
detect_burst(input, &channel_imp_resp[0], burst_start, output_binary); //detect bits using MLSE detection
|
||||
if (decode_sch(&output_binary[3], &t1, &t2, &t3, &d_ncc, &d_bcc) == 0) //decode SCH burst
|
||||
{
|
||||
DCOUT("sch burst_start: " << burst_start);
|
||||
DCOUT("bcc: " << d_bcc << " ncc: " << d_ncc << " t1: " << t1 << " t2: " << t2 << " t3: " << t3);
|
||||
d_burst_nr.set(t1, t2, t3, 0); //set counter of bursts value
|
||||
d_burst_nr++;
|
||||
|
||||
|
|
@ -188,109 +186,157 @@ receiver_impl::work(int noutput_items,
|
|||
//in this state receiver is synchronized and it processes bursts according to burst type for given burst number
|
||||
case synchronized:
|
||||
{
|
||||
DCOUT("Synchronized");
|
||||
vector_complex channel_imp_resp(CHAN_IMP_RESP_LENGTH*d_OSR);
|
||||
int burst_start;
|
||||
int offset = 0;
|
||||
int to_consume = 0;
|
||||
unsigned char output_binary[BURST_SIZE];
|
||||
|
||||
burst_type b_type = d_channel_conf.get_burst_type(d_burst_nr); //get burst type for given burst number
|
||||
double signal_pwr = 0;
|
||||
for(int ii=0;ii<noutput_items;ii++)
|
||||
{
|
||||
signal_pwr += abs(input[ii])*abs(input[ii]);
|
||||
}
|
||||
d_signal_dbm=static_cast<int8_t>(round(10*log10(signal_pwr/50/noutput_items)));
|
||||
burst_type b_type;
|
||||
|
||||
switch (b_type)
|
||||
for(int input_nr=0;input_nr<input_items.size();input_nr++)
|
||||
{
|
||||
case fcch_burst: //if it's FCCH burst
|
||||
{
|
||||
const unsigned first_sample = ceil((GUARD_PERIOD + 2 * TAIL_BITS) * d_OSR) + 1;
|
||||
const unsigned last_sample = first_sample + USEFUL_BITS * d_OSR - TAIL_BITS * d_OSR;
|
||||
double freq_offset_tmp = compute_freq_offset(input, first_sample, last_sample); //extract frequency offset from it
|
||||
|
||||
send_burst(d_burst_nr, fc_fb, b_type);
|
||||
|
||||
pmt::pmt_t msg = pmt::make_tuple(pmt::mp("freq_offset"),pmt::from_double(freq_offset_tmp-d_freq_offset_setting),pmt::mp("synchronized"));
|
||||
message_port_pub(pmt::mp("measurements"), msg);
|
||||
}
|
||||
break;
|
||||
case sch_burst: //if it's SCH burst
|
||||
{
|
||||
int t1, t2, t3, d_ncc, d_bcc;
|
||||
burst_start = get_sch_chan_imp_resp(input, &channel_imp_resp[0]); //get channel impulse response
|
||||
double signal_pwr = 0;
|
||||
input = (gr_complex *)input_items[input_nr];
|
||||
|
||||
detect_burst(input, &channel_imp_resp[0], burst_start, output_binary); //MLSE detection of bits
|
||||
send_burst(d_burst_nr, output_binary, b_type);
|
||||
if (decode_sch(&output_binary[3], &t1, &t2, &t3, &d_ncc, &d_bcc) == 0) //and decode SCH data
|
||||
for(int ii=GUARD_PERIOD;ii<TS_BITS;ii++)
|
||||
{
|
||||
// d_burst_nr.set(t1, t2, t3, 0); //but only to check if burst_start value is correct
|
||||
d_failed_sch = 0;
|
||||
DCOUT("bcc: " << d_bcc << " ncc: " << d_ncc << " t1: " << t1 << " t2: " << t2 << " t3: " << t3);
|
||||
offset = burst_start - floor((GUARD_PERIOD) * d_OSR); //compute offset from burst_start - burst should start after a guard period
|
||||
DCOUT("offset: "<<offset);
|
||||
to_consume += offset; //adjust with offset number of samples to be consumed
|
||||
signal_pwr += abs(input[ii])*abs(input[ii]);
|
||||
}
|
||||
else
|
||||
signal_pwr = signal_pwr/(TS_BITS);
|
||||
d_signal_dbm = round(10*log10(signal_pwr/50));
|
||||
if(input_nr==0){
|
||||
d_c0_signal_dbm = d_signal_dbm;
|
||||
}
|
||||
|
||||
if(input_nr==0) //for c0 channel burst type is controlled by channel configuration
|
||||
{
|
||||
d_failed_sch++;
|
||||
if (d_failed_sch >= MAX_SCH_ERRORS)
|
||||
b_type = d_channel_conf.get_burst_type(d_burst_nr); //get burst type for given burst number
|
||||
}
|
||||
else
|
||||
{
|
||||
b_type = normal_or_noise; //for the rest it can be only normal burst or noise (at least at this moment of development)
|
||||
}
|
||||
|
||||
switch (b_type)
|
||||
{
|
||||
case fcch_burst: //if it's FCCH burst
|
||||
{
|
||||
const unsigned first_sample = ceil((GUARD_PERIOD + 2 * TAIL_BITS) * d_OSR) + 1;
|
||||
const unsigned last_sample = first_sample + USEFUL_BITS * d_OSR - TAIL_BITS * d_OSR;
|
||||
double freq_offset_tmp = compute_freq_offset(input, first_sample, last_sample); //extract frequency offset from it
|
||||
|
||||
send_burst(d_burst_nr, fc_fb, b_type);
|
||||
|
||||
pmt::pmt_t msg = pmt::make_tuple(pmt::mp("freq_offset"),pmt::from_double(freq_offset_tmp-d_freq_offset_setting),pmt::mp("synchronized"));
|
||||
message_port_pub(pmt::mp("measurements"), msg);
|
||||
break;
|
||||
}
|
||||
case sch_burst: //if it's SCH burst
|
||||
{
|
||||
int t1, t2, t3, d_ncc, d_bcc;
|
||||
d_c0_burst_start = get_sch_chan_imp_resp(input, &channel_imp_resp[0]); //get channel impulse response
|
||||
|
||||
detect_burst(input, &channel_imp_resp[0], d_c0_burst_start, output_binary); //MLSE detection of bits
|
||||
send_burst(d_burst_nr, output_binary, b_type);
|
||||
if (decode_sch(&output_binary[3], &t1, &t2, &t3, &d_ncc, &d_bcc) == 0) //and decode SCH data
|
||||
{
|
||||
d_state = fcch_search;
|
||||
pmt::pmt_t msg = pmt::make_tuple(pmt::mp("freq_offset"),pmt::from_double(0.0),pmt::mp("sync_loss"));
|
||||
message_port_pub(pmt::mp("measurements"), msg);
|
||||
COUT("Re-Synchronization!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
|
||||
// d_burst_nr.set(t1, t2, t3, 0); //but only to check if burst_start value is correct
|
||||
d_failed_sch = 0;
|
||||
offset = d_c0_burst_start - floor((GUARD_PERIOD) * d_OSR); //compute offset from burst_start - burst should start after a guard period
|
||||
to_consume += offset; //adjust with offset number of samples to be consumed
|
||||
}
|
||||
else
|
||||
{
|
||||
d_failed_sch++;
|
||||
if (d_failed_sch >= MAX_SCH_ERRORS)
|
||||
{
|
||||
d_state = fcch_search;
|
||||
pmt::pmt_t msg = pmt::make_tuple(pmt::mp("freq_offset"),pmt::from_double(0.0),pmt::mp("sync_loss"));
|
||||
message_port_pub(pmt::mp("measurements"), msg);
|
||||
DCOUT("Re-Synchronization!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
|
||||
}
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
break;
|
||||
case normal_burst:
|
||||
{
|
||||
float normal_corr_max; //if it's normal burst
|
||||
d_c0_burst_start = get_norm_chan_imp_resp(input, &channel_imp_resp[0], &normal_corr_max, d_bcc); //get channel impulse response for given training sequence number - d_bcc
|
||||
detect_burst(input, &channel_imp_resp[0], d_c0_burst_start, output_binary); //MLSE detection of bits
|
||||
send_burst(d_burst_nr, output_binary, b_type);
|
||||
break;
|
||||
}
|
||||
case dummy_or_normal:
|
||||
{
|
||||
unsigned int normal_burst_start, dummy_burst_start;
|
||||
float dummy_corr_max, normal_corr_max;
|
||||
|
||||
case normal_burst:
|
||||
{
|
||||
float normal_corr_max; //if it's normal burst
|
||||
burst_start = get_norm_chan_imp_resp(input, &channel_imp_resp[0], &normal_corr_max, d_bcc); //get channel impulse response for given training sequence number - d_bcc
|
||||
detect_burst(input, &channel_imp_resp[0], burst_start, output_binary); //MLSE detection of bits
|
||||
send_burst(d_burst_nr, output_binary, b_type);
|
||||
break;
|
||||
}
|
||||
case dummy_or_normal:
|
||||
{
|
||||
unsigned int normal_burst_start;
|
||||
float dummy_corr_max, normal_corr_max;
|
||||
get_norm_chan_imp_resp(input, &channel_imp_resp[0], &dummy_corr_max, TS_DUMMY);
|
||||
normal_burst_start = get_norm_chan_imp_resp(input, &channel_imp_resp[0], &normal_corr_max, d_bcc);
|
||||
|
||||
DCOUT("normal_corr_max: " << normal_corr_max << " dummy_corr_max:" << dummy_corr_max);
|
||||
if (normal_corr_max > dummy_corr_max)
|
||||
{
|
||||
detect_burst(input, &channel_imp_resp[0], normal_burst_start, output_binary);
|
||||
send_burst(d_burst_nr, output_binary, b_type);
|
||||
dummy_burst_start = get_norm_chan_imp_resp(input, &channel_imp_resp[0], &dummy_corr_max, TS_DUMMY);
|
||||
normal_burst_start = get_norm_chan_imp_resp(input, &channel_imp_resp[0], &normal_corr_max, d_bcc);
|
||||
|
||||
if (normal_corr_max > dummy_corr_max)
|
||||
{
|
||||
d_c0_burst_start = normal_burst_start;
|
||||
detect_burst(input, &channel_imp_resp[0], normal_burst_start, output_binary);
|
||||
send_burst(d_burst_nr, output_binary, b_type);
|
||||
}
|
||||
else
|
||||
{
|
||||
d_c0_burst_start = dummy_burst_start;
|
||||
send_burst(d_burst_nr, dummy_burst, b_type);
|
||||
}
|
||||
break;
|
||||
}
|
||||
else
|
||||
{
|
||||
case rach_burst:
|
||||
break;
|
||||
case dummy:
|
||||
send_burst(d_burst_nr, dummy_burst, b_type);
|
||||
}
|
||||
}
|
||||
case rach_burst:
|
||||
break;
|
||||
case dummy:
|
||||
send_burst(d_burst_nr, dummy_burst, b_type);
|
||||
break;
|
||||
case empty: //if it's empty burst
|
||||
break; //do nothing
|
||||
}
|
||||
break;
|
||||
case normal_or_noise:
|
||||
{
|
||||
unsigned int burst_start;
|
||||
float normal_corr_max_tmp;
|
||||
float normal_corr_max=-1e6;
|
||||
int max_tn;
|
||||
std::vector<gr_complex> v(input, input + noutput_items);
|
||||
if(d_signal_dbm>=d_c0_signal_dbm-13)
|
||||
{
|
||||
plot(v);
|
||||
|
||||
d_burst_nr++; //go to next burst
|
||||
to_consume += TS_BITS * d_OSR + d_burst_nr.get_offset(); //consume samples of the burst up to next guard period
|
||||
//and add offset which is introduced by
|
||||
//0.25 fractional part of a guard period
|
||||
consume_each(to_consume);
|
||||
burst_start = get_norm_chan_imp_resp(input, &channel_imp_resp[0], &normal_corr_max, 7);
|
||||
// if(abs(d_c0_burst_start-burst_start)<=2){
|
||||
if((normal_corr_max/sqrt(signal_pwr))>=0.9){
|
||||
std::cout << static_cast<int>(d_signal_dbm) << std::endl;
|
||||
COUT("d_c0_burst_start: " << d_c0_burst_start);
|
||||
COUT("burst_start: " << burst_start);
|
||||
std::cout << "corr max to signal ratio: " << (normal_corr_max/sqrt(signal_pwr)) << std::endl;
|
||||
usleep(4e6);
|
||||
}
|
||||
detect_burst(input, &channel_imp_resp[0], burst_start, output_binary);
|
||||
send_burst(d_burst_nr, output_binary, b_type);
|
||||
}
|
||||
break;
|
||||
}
|
||||
case empty: //if it's empty burst
|
||||
break; //do nothing
|
||||
}
|
||||
|
||||
if(input_nr==0)
|
||||
{
|
||||
d_burst_nr++; //go to next burst
|
||||
to_consume += TS_BITS * d_OSR + d_burst_nr.get_offset(); //consume samples of the burst up to next guard period
|
||||
}
|
||||
|
||||
if(input_nr==input_items.size()-1)
|
||||
{
|
||||
consume_each(to_consume);
|
||||
}
|
||||
//and add offset which is introduced by
|
||||
//0.25 fractional part of a guard period
|
||||
}
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
@ -432,7 +478,6 @@ bool receiver_impl::find_fcch_burst(const gr_complex *input, const int nitems, d
|
|||
|
||||
case fcch_found:
|
||||
{
|
||||
DCOUT("fcch found on position: " << d_counter + start_pos);
|
||||
to_consume = start_pos + FCCH_HITS_NEEDED * d_OSR + 1; //consume one FCCH burst
|
||||
|
||||
d_fcch_start_pos = d_counter + start_pos;
|
||||
|
|
@ -531,7 +576,6 @@ int receiver_impl::get_sch_chan_imp_resp(const gr_complex *input, gr_complex * c
|
|||
correlation_buffer.push_back(correlation);
|
||||
power_buffer.push_back(std::pow(abs(correlation), 2));
|
||||
}
|
||||
//plot(power_buffer);
|
||||
//compute window energies
|
||||
vector_float::iterator iter = power_buffer.begin();
|
||||
bool loop_end = false;
|
||||
|
|
@ -693,14 +737,13 @@ int receiver_impl::get_norm_chan_imp_resp(const gr_complex *input, gr_complex *
|
|||
// int search_start_pos = search_center - d_chan_imp_length * d_OSR;
|
||||
int search_stop_pos = search_center + d_chan_imp_length * d_OSR + 5 * d_OSR;
|
||||
|
||||
for (int ii = search_start_pos; ii < search_stop_pos; ii++)
|
||||
for(int ii = search_start_pos; ii < search_stop_pos; ii++)
|
||||
{
|
||||
gr_complex correlation = correlate_sequence(&d_norm_training_seq[bcc][TRAIN_BEGINNING], N_TRAIN_BITS - 10, &input[ii]);
|
||||
|
||||
correlation_buffer.push_back(correlation);
|
||||
power_buffer.push_back(std::pow(abs(correlation), 2));
|
||||
}
|
||||
|
||||
//plot(power_buffer);
|
||||
//compute window energies
|
||||
vector_float::iterator iter = power_buffer.begin();
|
||||
bool loop_end = false;
|
||||
|
|
@ -748,10 +791,10 @@ int receiver_impl::get_norm_chan_imp_resp(const gr_complex *input, gr_complex *
|
|||
|
||||
*corr_max = max_correlation;
|
||||
|
||||
DCOUT("strongest_window_nr_new: " << strongest_window_nr);
|
||||
//DCOUT("strongest_window_nr_new: " << strongest_window_nr);
|
||||
burst_start = search_start_pos + strongest_window_nr - TRAIN_POS * d_OSR; //compute first sample posiiton which corresponds to the first sample of the impulse response
|
||||
|
||||
DCOUT("burst_start: " << burst_start);
|
||||
//DCOUT("burst_start: " << burst_start);
|
||||
return burst_start;
|
||||
}
|
||||
|
||||
|
|
@ -785,21 +828,6 @@ void receiver_impl::configure_receiver()
|
|||
d_channel_conf.set_burst_types(TIMESLOT0, FCCH_FRAMES, sizeof(FCCH_FRAMES) / sizeof(unsigned), fcch_burst);
|
||||
d_channel_conf.set_burst_types(TIMESLOT0, SCH_FRAMES, sizeof(SCH_FRAMES) / sizeof(unsigned), sch_burst);
|
||||
|
||||
// d_channel_conf.set_multiframe_type(TIMESLOT1, multiframe_26);
|
||||
// d_channel_conf.set_burst_types(TIMESLOT1, TRAFFIC_CHANNEL_F, sizeof(TRAFFIC_CHANNEL_F) / sizeof(unsigned), dummy_or_normal);
|
||||
// d_channel_conf.set_multiframe_type(TIMESLOT2, multiframe_26);
|
||||
// d_channel_conf.set_burst_types(TIMESLOT2, TRAFFIC_CHANNEL_F, sizeof(TRAFFIC_CHANNEL_F) / sizeof(unsigned), dummy_or_normal);
|
||||
// d_channel_conf.set_multiframe_type(TIMESLOT3, multiframe_26);
|
||||
// d_channel_conf.set_burst_types(TIMESLOT3, TRAFFIC_CHANNEL_F, sizeof(TRAFFIC_CHANNEL_F) / sizeof(unsigned), dummy_or_normal);
|
||||
// d_channel_conf.set_multiframe_type(TIMESLOT4, multiframe_26);
|
||||
// d_channel_conf.set_burst_types(TIMESLOT4, TRAFFIC_CHANNEL_F, sizeof(TRAFFIC_CHANNEL_F) / sizeof(unsigned), dummy_or_normal);
|
||||
// d_channel_conf.set_multiframe_type(TIMESLOT5, multiframe_26);
|
||||
// d_channel_conf.set_burst_types(TIMESLOT5, TRAFFIC_CHANNEL_F, sizeof(TRAFFIC_CHANNEL_F) / sizeof(unsigned), dummy_or_normal);
|
||||
// d_channel_conf.set_multiframe_type(TIMESLOT6, multiframe_26);
|
||||
// d_channel_conf.set_burst_types(TIMESLOT6, TRAFFIC_CHANNEL_F, sizeof(TRAFFIC_CHANNEL_F) / sizeof(unsigned), dummy_or_normal);
|
||||
// d_channel_conf.set_multiframe_type(TIMESLOT7, multiframe_26);
|
||||
// d_channel_conf.set_burst_types(TIMESLOT7, TRAFFIC_CHANNEL_F, sizeof(TRAFFIC_CHANNEL_F) / sizeof(unsigned), dummy_or_normal);
|
||||
|
||||
d_channel_conf.set_multiframe_type(TIMESLOT1, multiframe_51);
|
||||
d_channel_conf.set_burst_types(TIMESLOT1, TEST51, sizeof(TEST51) / sizeof(unsigned), dummy_or_normal);
|
||||
d_channel_conf.set_multiframe_type(TIMESLOT2, multiframe_51);
|
||||
|
|
|
|||
|
|
@ -34,16 +34,18 @@ namespace gr {
|
|||
class receiver_impl : public receiver
|
||||
{
|
||||
private:
|
||||
unsigned int d_c0_burst_start;
|
||||
float d_c0_signal_dbm;
|
||||
/**@name Configuration of the receiver */
|
||||
//@{
|
||||
const int d_OSR; ///< oversampling ratio
|
||||
const int d_chan_imp_length; ///< channel impulse length
|
||||
uint16_t d_arfcn;
|
||||
int8_t d_signal_dbm;
|
||||
float d_signal_dbm;
|
||||
//@}
|
||||
|
||||
gr_complex d_sch_training_seq[N_SYNC_BITS]; ///<encoded training sequence of a SCH burst
|
||||
gr_complex d_norm_training_seq[TRAIN_SEQ_NUM][N_TRAIN_BITS]; ///<encoded training sequences of a normal bursts and dummy bursts
|
||||
gr_complex d_norm_training_seq[TRAIN_SEQ_NUM][N_TRAIN_BITS]; ///<encoded training sequences of a normal and dummy burst
|
||||
|
||||
/** Counts samples consumed by the receiver
|
||||
*
|
||||
|
|
|
|||
Loading…
Reference in New Issue