82dd0a63f1
Clarification of naming: renamed DATA_SYNC_WORD to STREAM_SYNC_WORD and Audio_puncture to DATA_PUNCTURE
2022-05-27 21:48:46 +02:00
5fbd39959c
Implementation of M17 frame decoder
2022-05-27 21:48:46 +02:00
49bd8ee2f4
Reorganised internal structure of M17LinkSetupFrame class, renamed M17Frame to M17StreamFrame and reorganised its structure
2022-05-27 21:48:46 +02:00
c73aa92305
Reorganised M17LinkSetupframe and M17Frame classes, encapsulating structs defining their internal data structure
2022-05-27 21:48:46 +02:00
7a9bbfcaf2
Demodulator bugfix
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Fix several bugs in the demodulator code, tipycally sign errors.
2022-05-27 21:48:46 +02:00
1a9b3c4168
Implement M17 demodulator logic
...
Implemented frame wrapping logic and demodulator loop.
2022-05-27 21:48:46 +02:00
963fbdc141
M17 mode handler: calling demodulator update function when in RX mode
2022-05-27 21:48:46 +02:00
5bf4df75ba
Fine tune demodulator to OpenRTX M17 baseband
...
Fine tuned M17 demodulator with code generated from OpenRTX itself.
TG-81
2022-05-27 21:48:46 +02:00
4b498689f5
Replace RRC filter taps, update M17 testsuite
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RRC filter taps have been replaced with the ones generated by Wojciech,
a new baseband for the M17 demodulation testsuite has been generated,
using OpenRTX itself and some further minor changes.
TG-81
2022-05-27 21:48:46 +02:00
3163dd49d7
Add M17 demodulator code and tests
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Added implementation of the M17 4FSK demodulator, including clock
recovery, phase detection, and quantization algorithms.
A testsuite is also included to do regression testing against a
reference baseband pre-generated and the corresponding reference
bitstream.
A 1% BER is still present due to a fault likely in the RRC filtering,
since the eye diagram of the filtered stream is bad.
TG-81
2022-05-27 21:48:46 +02:00
396f66a1f3
Implementation of M17 Viterbi decoder and associated unit test
2022-05-27 21:48:46 +02:00
3aeade6c1f
Clarify M17 modulator constant naming
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Further clarify modulator constant naming for sample rate and frame
lengths, to distinguish between demodulator values.
2022-05-27 21:48:46 +02:00
6588a6718e
Add M17 namespace in M17 related source files
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Now M17 source files reside in the M17 namespace, the OPMODE_ prefix
was added to all opmode enums to avoid a name clash.
2022-05-27 21:48:46 +02:00
876cb87d57
Move rrc filter into separate compilation unit
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By moving the rrc filter into a separate compilation unit with its own
header file, we can use it both in the modulator and in the demodulator.
2022-05-27 21:48:46 +02:00
c648ffe377
Add draft of M17Demodulator class
2022-05-27 21:48:46 +02:00
8a3643ad3a
Implementation of Golay(24,12) decoder, reimplemented Golay(24,12) encoder using generator matrix, unit test for Golay(24,12) encoding and decoding routines
2022-05-27 21:48:46 +02:00
a3b7b490d4
Fixed jitter in M17 baseband signal generation
2022-05-27 21:48:46 +02:00
a9e1e68709
Implemented function for inverse code puncturing in M17 protocol
2021-10-03 12:09:00 +02:00
d018dbb4a0
Implementation of M17 polynomial deinterleaver
2021-09-20 21:34:59 +02:00
bad5a50d7d
Updated code puncturing pattern for M17 link setup frame to follow new specifications
2021-09-03 16:44:57 +02:00
2f3db118fc
Changed streamType_t from bitfield struct to union of anonymous bitfield struct and uint16_t to facilitate endianness conversion. Change also fixed a bug in endianness conversion inside M17LinkSetupFrame class due to unaligned memory access.
2021-09-03 16:44:57 +02:00
92ea1535ff
Moved definition of 'PLATFORM_LINUX' macro from hwconfig to meson.build, added '-std=c++14' compilation flag to compile arguments for linux platform, added missing includes to M17Utils.h
2021-09-03 16:44:57 +02:00
98e4164f54
M17 transmitter class
2021-09-03 16:44:57 +02:00
39e41ee470
M17 4FSK modulator class
2021-09-03 16:44:57 +02:00
7b5e98bbca
Implemented generation of Golay(24,12) LICH blocks inside M17LinkSetupFrame class
2021-09-03 16:39:06 +02:00
93af26ef13
Implementation of M17 decorrelator, polynomial interleaver and Golay(24,12) encoder
2021-09-03 16:39:06 +02:00
ee1b111fb7
Implementation of M17 code puncturing scheme
2021-09-03 16:39:06 +02:00
d545071df6
Implementation of M17 convolutional encoder
2021-09-03 16:39:06 +02:00
9e5c689bf3
M17 protocol data structures
2021-09-03 16:39:06 +02:00
Silvano Seva
Niccolò Izzo