a366b3ac4f
CRC class.
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Has some more efficient code, commented out because I was having trouble getting it to work. However, it may have been due to the particular data I was trying to decode and CRC-validate.
2015-11-06 13:49:59 -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
5236a858d0
Change Field.read to const.
2015-11-06 09:40:04 -08:00
a33aa26bf5
Change header guard name.
2015-11-06 09:40:04 -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
be94c9fa9b
Switching between waterfall and console mode.
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Also remove an unused Console constructor.
2015-11-06 09:40:03 -08:00
d0f35cf89d
Rework spectrum/console UI clearing and resetting.
2015-11-06 09:40:03 -08:00
dc30911e0f
Check for widget != nullptr before add/remove child.
2015-11-06 09:40:03 -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
0a7ac153a7
AIS RRC taps updated, more precision, corrected frequency shift.
2015-11-06 09:40:03 -08:00
338983e7ae
Remove unused negative-shifted RRC filters.
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
3e9f0971e1
Assert that FSKConfiguration size is the same between application and baseband binaries.
2015-11-06 09:40:02 -08:00
64ed539554
Change LinearResampler.advance to external use only.
2015-11-06 09:40:02 -08:00
4ed385d15e
Prioritize PacketBuilder found_end_flag() over packet_truncated().
2015-11-06 09:40:02 -08:00
c2e7f9a6f4
Shorten AIS training sequence match length.
2015-11-06 09:40:02 -08:00
d92c962c0c
Set MatchedFilter taps with separate method.
2015-11-06 09:40:02 -08:00
8198db768d
Move some MatchedFilter code to .cpp file.
2015-11-06 09:40:02 -08:00
aff7865c61
Move (some) AIS bits to a separate file.
2015-11-06 09:40:02 -08:00
7a5100baf1
Enlarge packet payload size 256 -> 1024 bits.
2015-11-06 09:40:01 -08:00
68250b4d30
Expose weight() of FixedErrorFilter.
2015-11-06 09:40:01 -08:00
474eaa8541
Template ClockRecovery for ErrorFilter type.
2015-11-06 09:40:01 -08:00
9879af37d5
FixedErrorFilter constructor.
2015-11-06 09:40:01 -08:00
727d4c8a1f
Const the FixedErrorFilter operator().
2015-11-06 09:40:01 -08:00
93b9b9d9ef
LinearErrorFilter constructor.
2015-11-06 09:40:01 -08:00
57db6a6367
Ignore more initial bits of AIS training sequence.
2015-11-06 09:40:01 -08:00
37b1d7cf2f
Remove payload_length from PacketBuilder, etc.
2015-11-06 09:40:01 -08:00
142617ad94
Silence Clang warning.
2015-11-06 09:40:01 -08:00
cf3bff3b03
Decouple PacketBuilder PayloadHandler function from method type.
2015-11-06 09:40:01 -08:00
1bdad62496
Simplify PacketBuilder pattern matching and symbol accumulation.
2015-11-06 09:40:00 -08:00
Jared Boone