2014-10-10 14:45:05 +00:00
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Osmocom ADS-B generator/transmitter
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2015-03-29 14:29:09 +00:00
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(C) 2014-2015 by Harald Welte <laforge@gnumonks.org>
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2014-10-10 14:45:05 +00:00
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======================================================================
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adsb_gen - ADS-B / Mode-S transmitter
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WARNING: ONLY USE THIS TOOL WITH DIRECT COAXIAL CABLE CONNECTION BETWEEN
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TRANSMITTER AND RECEIVER OR INSIDE A SHIELDED CHAMBER. ADS-B OPERATES ON
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LICENSED SPECTRUM AND THE AUTHOR IS NOT RESPONSIBLE FOR IMPROPER USE OF
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THIS TOOL.
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This is a small toolset for generating Mode-S / ADS-B test data,
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intended for testing ADS-B receivers. This includes production testing
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but also comparison of various receivers against each other in terms of
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sensitivity.
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This is very early PoC code and can probably do with lots of
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improvements, particularly related to the modulation depth, transmit
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power, etc.
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2015-03-29 14:29:09 +00:00
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There are two ways of using the project:
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1) Old style (with gnuradio before it had PDU abstraction)
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2014-10-10 14:45:05 +00:00
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The idea is as follows:
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* provide a text file with ADS-B sentences in regular encoding like
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'*8D48415F600796758E', one sentence on every line.
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* call adsb_gen with the synax '[-p pause_usec] <infname> <outfname>'
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where infname is the name of the ASCII input file and outfname is the
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binary.
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* the above will generate the output file whihc contains the coded ADS-B
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data at one unsigned byte per bit at 2MS/s sample rate.
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* you can use the file_to_usrp2.grc gnuradio companion block to actually
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send this file in an endless loop.
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* the '-p' parameter can be used to configure the gap between subsequent
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ADS-B sentences (specified in microseconds). The default is 1s.
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2015-03-29 14:29:09 +00:00
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2) New style (with gnuradio 3.7)
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* Build the gr-adsbtx module like usual using cmake/make
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* Run the adsb_gen.grc flow graph in gnuradio-companiion
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* Connect to localhost port 52002 and send ADS-B sentences
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to it
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