bd33e652ea
Abstract packet type/implementation details.
2015-12-07 12:35:05 -08:00
2d0052fb14
Generalize ERT offset tracking a little.
2015-12-07 09:58:08 -08:00
b9643dc988
Clean up ERT packet type notation.
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Still not great, but at least repeated code is reduced.
2015-12-06 15:47:04 -08:00
4205793b54
Clean up narrowing conversion warning.
2015-12-03 20:58:17 -08:00
82ff45860e
Add basic ERT (OOK) utility meter reception.
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Extracted the Manchester formatting function for use in ERT, now also returns an indication of bits in error.
2015-12-01 11:24:48 -08:00
435824e9b5
Clean up buffer_t constructors.
2015-11-20 11:21:31 -08:00
600a983d5c
Clean up complex<int16_t> -> complex<float> casting.
2015-11-20 11:01:41 -08:00
85e984ed3b
Clean up complex<int8_t> -> complex<float> casting.
2015-11-19 12:42:35 -08:00
060da5d227
Add ChannelDecimator decimate by 2 and no-shift options.
2015-11-19 12:24:20 -08:00
ccd64f3cd9
Add function for c8->c16 decimate by two without fs/4 shift.
2015-11-19 12:20:20 -08:00
8967f0eaa1
Move common matchers to PacketBuilder.
2015-11-16 10:33:50 -08:00
1770dff522
Finish object-izing Baseband and RSSI threads.
2015-11-11 10:54:36 -08:00
d9106b6f44
Start object-ization of RSSI thread.
2015-11-11 10:11:37 -08:00
19c89def75
Start to object-ize the baseband thread function.
2015-11-11 10:02:06 -08:00
2c64454172
More constructor style clean-up.
2015-11-11 09:35:28 -08:00
d02698a6de
Apparent bug where min/max aren't initialized from value inside the buffer bounds.
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The fix is less than ideal, it assumes that an incoming buffer length is always >= 1.
2015-11-11 09:30:15 -08:00
ebf103363c
Constructor style clean-up.
2015-11-11 09:16:20 -08:00
9f6c495fef
Add TPMS initial demodulator implementation.
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Right now, 2FSK, 19200 baud, +/-38400Hz deviation. No effort is made to check CRC/checksums or decode packets.
2015-11-10 15:19:56 -08:00
6cdef7026d
Remove spectrum window-presum due to lack of code RAM.
2015-11-10 15:16:27 -08:00
99871dcb84
Move a few member variables to stack/constants.
2015-11-10 15:10:52 -08:00
981c2fbfbd
Complete FSKProcessor's trip to being AISProcessor.
2015-11-10 15:04:38 -08:00
111a5f10c0
Add some baseband constructors.
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Some of them I think I took out earlier...
2015-11-10 14:04:50 -08:00
add6171410
Move BasebandStatistics from heap to stack.
2015-11-10 13:59:17 -08:00
0789d50fdf
Rework BitHistory, BitPattern, PacketBuilder.
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Templatize PacketBuilder to optionally bit unstuff, and have flexible packet termination behavior.
2015-11-09 14:38:09 -08:00
5dcca89172
FSKProcessor: remove separate channel filter.
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RRC filter alone will do the trick!
2015-11-07 14:10:44 -08:00
fc037c739a
Comment about correct MatchedFilter usage.
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Because the filter expects a combined translate/rotate and low-pass filter in the taps, the taps must be a multiple of the translate sinusoid period.
2015-11-07 11:27:31 -08:00
ae225e8c3b
Further MatchedFilter optimization using algebraic identities and stuff.
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Can't stop premature optimization!!!
2015-11-06 09:40:05 -08:00
100761481e
Fix inaccurate comment.
2015-11-06 09:40:05 -08:00
3d5c8056d9
Premature optimization of MatchedFilter::shift_by_decimation_factor().
2015-11-06 09:40:05 -08:00
4afcc83873
Mark MatchedFilter::is_new_decimation_cycle() as const.
2015-11-06 09:40:05 -08:00
3c33e20156
Rename MatchedFilter::decimation_factor.
2015-11-06 09:40:05 -08:00
7a59823211
Stop computing channel spectrum during FSK demod.
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Data is unused, as screen is displaying decoded packets.
2015-11-06 09:40:05 -08:00
ddd34793a6
Default constructors and configure methods for baseband classes.
2015-11-06 09:40:05 -08:00
51df92a05a
Rename baseband_ais -> ais_baseband.
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So that ais_baseband and ais_application filenames can be sorted near each other.
2015-11-06 09:40:04 -08:00
26c23dc8a0
Use new FIR decimation in FSK demodulator.
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Reduces FIR calculation effort when output samples are skipped at FIR filter, not after.
2015-11-06 09:40:04 -08:00
86b068be62
Early calculation to reduce pressure on registers.
2015-11-06 09:40:04 -08:00
a074e7d8d8
Remove commented code.
2015-11-06 09:40:04 -08:00
424c0eac3f
FIRAndDecimateBy2Complex: expose decimation_factor, bring work function into class.
2015-11-06 09:40:04 -08:00
cde15e4271
Generalize fir_and_decimate_by_2_complex_fast.
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Permit decimation_factors other than 2.
Permit tap counts != 64 (but still must be multiple of 8).
Half the amount of tap memory required.
Performance is significantly degraded due to greater flexibility -- most likely due to separate sample buffer shift phase, instead of performing shift during output sample calculation.
2015-11-06 09:40:04 -08:00
be78ed657f
Remove taps_count template arg for FIRAndDecimateBy2Complex.
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Use heap to allocate samples and taps buffers, so filters of different lengths can be supported.
2015-11-06 09:40:04 -08:00
0f73d6061a
Remove old decimating FIR code.
2015-11-06 09:40:04 -08:00
015e5516d5
Update/consolidate AIS RRC matched filter taps.
2015-11-06 09:40:04 -08:00
dab801e167
AIS RX tweak of clock recovery constant for better performance.
2015-11-06 09:40:03 -08:00
58b97dea68
AIS RX performance improved with 32-tap RRC.
2015-11-06 09:40:03 -08:00
f82fd1f8d7
Tease apart utility.hpp, other header dependencies.
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Trying to get a host-testable FSK demodulator, and finding a lot of M4- and ChibiOS-specific code is getting included. Boo.
2015-11-06 09:40:03 -08:00
e049097f49
Remove spurious commented code.
2015-11-06 09:40:03 -08:00
4aae77f565
MatchedFilter improvements
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Use single set of taps for positive and negative filters.
Reverse taps (since new samples are pushed into buffer from the high end).
Make complex multiply explicit to avoid fancy but irrelevant arithmetic checks.
Compute negative filter from conjugation of positive filter taps.
Move filter power and difference calculations into MatchedFilter.
2015-11-06 09:40:03 -08:00
ab28639a3d
Use std::move to move samples in buffer.
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Yes, std::rotate works, but it's fancy and does unnecessary work.
2015-11-06 09:40:02 -08:00
4141d6fe0f
Untemplate MatchedFilter, a different way.
2015-11-06 09:40:02 -08:00
fe94cfa45a
De-std::vector MatchedFilter, was chewing up far too much memory.
2015-11-06 09:40:02 -08:00
Jared Boone