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1 207 Commity
19 Gałęzie
13 Tagi
45 MiB
Wykres commitów

1207 Commity (42b262c437d2fccbdc59aece296b7dd69e300df8)

Autor SHA1 Wiadomość Data
Niccolò Izzo b1f2cb109f Switch M17 Rx sample rate to 5SPS 
Due to the RRC computation sometimes violating the timing constraints,
we switched the M17 demodulator to 5 samples per symbol (24KHz), thus
dividing the processing time by four ar the number of samples halves as
well as the number of taps of the RRC.
Minor adaptation on the code followed.

TG-81
 2022-05-27 21:48:47 +02:00
Silvano Seva e68b05d859 Fixed double free errors in M17 code, see #73 2022-05-27 21:48:47 +02:00
Niccolò Izzo 2d59658d60 Switch M17 Rx sample rate to 5SPS 
Due to the RRC computation sometimes violating the timing constraints,
we switched the M17 demodulator to 5 samples per symbol (24KHz), thus
dividing the processing time by four ar the number of samples halves as
well as the number of taps of the RRC.
Minor adaptation on the code followed.

TG-81
 2022-05-27 21:48:47 +02:00
Niccolò Izzo 63bd864674 Fix M17 Rx LED 
Now LED turns on when a syncword is successfully detected, not just when
the correlation is sufficiently high.

TG-81
 2022-05-27 21:48:47 +02:00
Niccolò Izzo c4483edff0 Improve quantization strategy 
Now quantization is performed by averaging syncword samples and dividing
the resulting threshold by a constant.

TG-81
 2022-05-27 21:48:47 +02:00
Niccolò Izzo 2e7ed7a8f0 M17 demodulator further improvements 
- Fix phase propagation across buffers
- Fix initial syncword offset detection
- Improve quantization algorithm

TG-81
 2022-05-27 21:48:47 +02:00
Niccolò Izzo 7d1b89550e Rewrite quantization algorithm 
Quantization algorithm is now based on separate rolling averages for
positive and negative samples.
Merged csv outputs from syncword search and quantization on Linux.

TG-81
 2022-05-27 21:48:47 +02:00
Niccolò Izzo aa9fcc26b7 Remove useless DC bias in quantization 
TG-81
 2022-05-27 21:48:47 +02:00
Niccolò Izzo d1651a702c Add proper DC-bias removal, tuned EMAs 2022-05-27 21:48:47 +02:00
Silvano Seva da5c453852 Implemented unpacking and decoding of M17 audio stream frames 2022-05-27 21:48:47 +02:00
Silvano Seva a37e24c953 Fixed a buffer management bug inside linux input stream driver 2022-05-27 21:48:47 +02:00
Silvano Seva 086cb549c7 Stub implementation of output stream driver for linux emulator 2022-05-27 21:48:47 +02:00
Silvano Seva beca0d2acc Reorganised constants inside M17 demodulator class 2022-05-27 21:48:47 +02:00
Silvano Seva 77dfeef9e7 Implemented audio decoding functions in CODEC2 module 2022-05-27 21:48:47 +02:00
Silvano Seva c7fbd98dc9 Stub implementatio of output stream driver for GDx devices 2022-05-27 21:48:47 +02:00
Silvano Seva fda0fed5e7 Moved constant specifying sample rate for M17 baseband decoding from hwconfig.h files to M17Demodulator class 2022-05-27 21:48:47 +02:00
Silvano Seva e5b5daba85 Moved state variables of PWM compensator and DC removal filter outside the function bodies to allow keeping their consistency among function calls 2022-05-27 21:48:47 +02:00
Silvano Seva 9139b19aac Fixed bug in MDx input stream driver causing the SPI clock line towards the DMR chip to be set as analog input when an audio stream from the RF stage was opened 2022-05-27 21:48:47 +02:00
Mathis Schmieder 89c05a7332 Adjusted Module17 mic processing gain; interim-fix for DC offset removal 2022-05-27 21:48:47 +02:00
Silvano Seva 49e5486ea6 Parametric mic gain inside codec2 module 2022-05-27 21:48:47 +02:00
Silvano Seva b144657257 Moved CODEC2 management to a dedicated module 2022-05-27 21:48:47 +02:00
Silvano Seva 4b8685b853 Changed gain and added an offset at tx RRC stage only for Module 17 to compensate for an hardware bug 2022-05-27 21:48:47 +02:00
Silvano Seva 4a3e31cd03 Fixed bug in M17 demodulator caused by the precedent code refactoring 2022-05-27 21:48:47 +02:00
Silvano Seva d1b4973cc9 Fixed reset of DC bias on stream stop in Module 17 output stream driver, made parametric the gain of the RRC at modulator side 2022-05-27 21:48:47 +02:00
Silvano Seva 94fdf44954 Biased Module 17 baseband DAC output to Vdd/2 when idle 2022-05-27 21:48:47 +02:00
Silvano Seva 83020d4fa3 Increased priority of CODEC2 thread, this fixes glitches when generating M17 baseband signal 2022-05-27 21:48:47 +02:00
Silvano Seva 628c341712 Small improvements to MDx and Module 17 output stream drivers 2022-05-27 21:48:47 +02:00
Silvano Seva 1bc1316f7d Fixed bug to Module 17 input stream driver causing the thread waiting on inputStream_getData() to not be woken up when stream was stopped 2022-05-27 21:48:47 +02:00
Silvano Seva 12dc186129 Fixed bug in Module 17 output stream driver causing outputStream_sync() to hang when a stream was opened for the second time 2022-05-27 21:48:47 +02:00
Silvano Seva eb22e4b4b2 Default VFO channel for Module 17, making it start in M17 operating mode at boot 2022-05-27 21:48:47 +02:00
Silvano Seva 3d169484e9 Improved management of CODEC2 thread in M17 mode handler, now activated only when transmitting. Fixes a confict with RTX and MIC input streams causing the rtx thread to hang when PTT was pressed 2022-05-27 21:48:47 +02:00
Silvano Seva 54a89abcd0 Removed a printf left behind after debugging from M17 demodulator class and slightly cleaned up the code 2022-05-27 21:48:47 +02:00
Silvano Seva 163a2ef06a Updated Module 17 output stream driver to support also double buffered mode 2022-05-27 21:48:47 +02:00
Silvano Seva c9a4bfb199 Cleanup and refactoring of M17 modulator class, now using output streams for baseband signal output 2022-05-27 21:48:47 +02:00
Silvano Seva 0df1dc4f7e Extended output stream API to support also circular double-buffered mode, implemented output stream driver for MDx 2022-05-27 21:48:47 +02:00
Silvano Seva 034f5d9ee9 Removed API for audio stream playback from MDx tone generator 2022-05-27 21:48:47 +02:00
Silvano Seva 5c90c19bea Data conversion utilities 2022-05-27 21:48:47 +02:00
Silvano Seva 7891288030 Fixed compilation warnings generated by graphics.cpp 2022-05-27 21:48:47 +02:00
Silvano Seva 427c5f50b3 Made M17Demodulator::update() return a boolean indicating when a new decoded frame is ready 2022-05-27 21:48:47 +02:00
Niccolò Izzo 3372da2b64 Set Rx test to 48k 2022-05-27 21:48:47 +02:00
Niccolò Izzo 77aead675a Improve runtime performance of M17 Demodulator 
Tweaked the exponential moving average alpha factors to improve the
reactivity of the M17 demodulator.

TG-81
 2022-05-27 21:48:47 +02:00
Niccolò Izzo 5ef145cd39 Add fuzzy syncword validation 
Now syncword match is not exact but can tolerate up to two erroneous
bits.

TG-81
 2022-05-27 21:48:47 +02:00
Niccolò Izzo ca49b306b9 Update constants for M17 demodulation 
Constants were updated to increase performance based on baseband sample
collected with Module17.

TG-81
 2022-05-27 21:48:47 +02:00
Niccolò Izzo 2d8c696a09 Complete M17 demodulator implementation 
Make quantization work also on DC offset signal
Add samples plot code
Fix bug in buffer wrap around
Fix oob memory access in M17 modulator
Update tests with DC offset signal
Switch to 48KHz sample rate for Module17 and MD380
Add DC biasing script

TG-81
 2022-05-27 21:48:46 +02:00
Silvano Seva 10b8b59e21 Added to MDx tone generator API functions allowing user code to temporarily disable generation of 'beep' tones 2022-05-27 21:48:46 +02:00
Niccolò Izzo f9c23452bc Add plotting function to graphics library 
Added plotting function to graphics library which is native C++, so
refactored the graphics source file to allow that, consequently adapted
the hwconfig header files to be included also in C++ sources.
Propagated compile flags also to C++ sources, including asan what was
previously disabled for C++ compilation units.

TG-81
 2022-05-27 21:48:46 +02:00
Niccolò Izzo ae26cca46f Remove SPS 
Now M17_SAPLES_PER_SYMBOL is computed dinamically from sample rate.

TG-81
 2022-05-27 21:48:46 +02:00
Niccolò Izzo a091bca35f M17 Demodulator bugfixes 
Fixed several bugs in the M17 Demodulator code.

TG-81
 2022-05-27 21:48:46 +02:00
Silvano Seva d2c7be9cc8 Fixed bug affecting LSF reassembling from LICH segments inside M17 frame decoder class 2022-05-27 21:48:46 +02:00
Silvano Seva 35c1f062c6 Implementation of M17 frame encoder 2022-05-27 21:48:46 +02:00