Added gmsk modulator block for gsm

grc/CMakeLists.txt

@@ -24,6 +24,7 @@ add_subdirectory(receiver)
 add_subdirectory(flow_control)
 add_subdirectory(misc_utils)
 add_subdirectory(trx_interface)
+add_subdirectory(transmitter)
 install(FILES
     gsm_block_tree.xml DESTINATION share/gnuradio/grc/blocks
 )

grc/gsm_block_tree.xml

@@ -24,6 +24,7 @@
     <cat>
       <name>Transmitter</name>
       <block>gsm_txtime_bursts_tagger</block>
+      <block>gsm_gmsk_mod</block>
     </cat>
     <cat>
       <name>Logical channels demapping</name>

grc/transmitter/CMakeLists.txt

@@ -18,5 +18,6 @@
 # Boston, MA 02110-1301, USA.
 
 install(FILES
+    gsm_gmsk_mod.xml
     gsm_txtime_bursts_tagger.xml DESTINATION share/gnuradio/grc/blocks
 )

grc/transmitter/gsm_gmsk_mod.xml

@@ -0,0 +1,47 @@
+<block>
+  <name>GMSK Modulator for GSM</name>
+  <key>gsm_gmsk_mod</key>
+  <import>from grgsm import gsm_gmsk_mod</import>
+  <make>gsm_gmsk_mod(
+    BT=$BT,
+    pulse_duration=$pulse_duration,
+    sps=$sps,
+)</make>
+  <callback>set_BT($BT)</callback>
+  <callback>set_pulse_duration($pulse_duration)</callback>
+  <callback>set_sps($sps)</callback>
+  <param>
+    <name>3 dB Time-Bandwidth Product</name>
+    <key>BT</key>
+    <value>4</value>
+    <type>raw</type>
+  </param>
+  <param>
+    <name>Pulse Duration</name>
+    <key>pulse_duration</key>
+    <value>4</value>
+    <type>raw</type>
+  </param>
+  <param>
+    <name>Samples/Symbol</name>
+    <key>sps</key>
+    <value>4</value>
+    <type>raw</type>
+  </param>
+  <sink>
+    <name>in</name>
+    <type>byte</type>
+    <vlen>1</vlen>
+    <optional>1</optional>
+  </sink>
+  <source>
+    <name>out</name>
+    <type>complex</type>
+    <vlen>1</vlen>
+    <optional>1</optional>
+  </source>
+  <doc>Piotr Krysik
+GMSK Modulator for GSM
+  </doc>
+  <grc_source>gr-gsm/hier_blocks/transmitter/gsm_gmsk_mod.grc</grc_source>
+</block>

python/__init__.py

@@ -55,6 +55,7 @@ from gsm_input import gsm_input
 from gsm_bcch_ccch_demapper import gsm_bcch_ccch_demapper
 from gsm_bcch_ccch_sdcch4_demapper import gsm_bcch_ccch_sdcch4_demapper
 from gsm_sdcch8_demapper import gsm_sdcch8_demapper
+from gsm_gmsk_mod import gsm_gmsk_mod
 from fn_time import *
 from txtime_bursts_tagger import *
 #from ctrl_if import *

python/transmitter/gsm_gmsk_mod.py

@@ -0,0 +1,69 @@
+# -*- coding: utf-8 -*-
+##################################################
+# GNU Radio Python Flow Graph
+# Title: GMSK Modulator for GSM
+# Author: Piotr Krysik
+# Description: GMSK Modulator for GSM
+# Generated: Wed Sep 20 21:12:04 2017
+##################################################
+
+from gnuradio import blocks
+from gnuradio import digital
+from gnuradio import gr
+from gnuradio.analog import cpm
+from gnuradio.filter import firdes
+import grgsm
+
+class gsm_gmsk_mod(grgsm.hier_block):
+
+    def __init__(self, BT=4, pulse_duration=4, sps=4):
+        gr.hier_block2.__init__(
+            self, "GMSK Modulator for GSM",
+            gr.io_signature(1, 1, gr.sizeof_char*1),
+            gr.io_signature(1, 1, gr.sizeof_gr_complex*1),
+        )
+
+        ##################################################
+        # Parameters
+        ##################################################
+        self.BT = BT
+        self.pulse_duration = pulse_duration
+        self.sps = sps
+
+        ##################################################
+        # Blocks
+        ##################################################
+        self.digital_gmskmod_bc_0 = digital.gmskmod_bc(sps, pulse_duration, BT)
+        self.digital_diff_decoder_bb_0 = digital.diff_decoder_bb(2)
+        self.digital_chunks_to_symbols_xx_0 = digital.chunks_to_symbols_bf(([1,-1]), 1)
+        self.blocks_tagged_stream_multiply_length_0 = blocks.tagged_stream_multiply_length(gr.sizeof_gr_complex*1, "packet_len", sps)
+        self.blocks_float_to_char_0 = blocks.float_to_char(1, 1)
+
+        ##################################################
+        # Connections
+        ##################################################
+        self.connect((self.blocks_float_to_char_0, 0), (self.digital_gmskmod_bc_0, 0))    
+        self.connect((self.blocks_tagged_stream_multiply_length_0, 0), (self, 0))    
+        self.connect((self.digital_chunks_to_symbols_xx_0, 0), (self.blocks_float_to_char_0, 0))    
+        self.connect((self.digital_diff_decoder_bb_0, 0), (self.digital_chunks_to_symbols_xx_0, 0))    
+        self.connect((self.digital_gmskmod_bc_0, 0), (self.blocks_tagged_stream_multiply_length_0, 0))    
+        self.connect((self, 0), (self.digital_diff_decoder_bb_0, 0))    
+
+    def get_BT(self):
+        return self.BT
+
+    def set_BT(self, BT):
+        self.BT = BT
+
+    def get_pulse_duration(self):
+        return self.pulse_duration
+
+    def set_pulse_duration(self, pulse_duration):
+        self.pulse_duration = pulse_duration
+
+    def get_sps(self):
+        return self.sps
+
+    def set_sps(self, sps):
+        self.sps = sps
+        self.blocks_tagged_stream_multiply_length_0.set_scalar(self.sps)