4549d8bbae
Removed legacy OFDM flow graphs
...
These were probably broken anyway since the upgrade to GR 3.8 and also
OFDM is not very relevant in a 200 kHz channel on 70cm.
2019-10-14 21:51:43 +02:00
0ff97ff980
Flowgraph cleanup
2019-10-14 21:45:33 +02:00
872fb0be7a
demod: replaced AGC with AGC2
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AGC2 provides fast attack and slow decay.
2019-09-28 00:09:10 +02:00
c805bee1fb
New preamble and header modulation to assist phase tracking
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Also, the new symbols give more power to the sync parts, which should
make the sync more robust.
2019-09-25 23:53:36 +02:00
f38ad55b10
Insert new phase tracker block
2019-09-25 23:53:36 +02:00
718cf6366e
Completed test flow graph port to GR 3.8
2019-09-19 00:20:23 +02:00
9cd866b2ba
Converted some test flow graphs to GR 3.8
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(not working yet)
2019-09-16 23:31:57 +02:00
f003431b8c
Upgrade OOT module to GNU Radio 3.8
2019-09-16 23:02:01 +02:00
da4c9e08d4
Increased robustness of feed-forward freq. correction
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- Increased pilot sequence length to 16 symbols
- Calculate phase difference from start for all symbols instead of
averaging over pilot blocks
2019-09-14 23:36:04 +02:00
1c287466db
Added interleaver
2019-09-14 01:23:26 +02:00
85ce667d7b
Added more pilot symbols for precision frequency estimation
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This adds 4 pilot symbols each after 128 and 256 data symbols. These are
used for precision frequency estimation and feed-forward correction,
resulting in less decoder errors at the end of the packet.
Due to this change, this system can no longer transmit packets shorter
than 64 bytes!
2019-09-13 23:10:23 +02:00
69a497ccf8
Further optimize preamble
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Maximum off-center autocorrelation value is now 11 (center peak is 128).
2019-09-13 23:07:48 +02:00
9ef01a3e5f
Updated preamble based on walsh-hadamard sequence
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This should improve the correlation behaviour.
2019-09-11 21:29:48 +02:00
Thomas Kolb
58bd3d3c26
Made debug ports optional
2019-08-07 20:00:02 +00:00
Thomas Kolb
9e7dcaf678
Added scrambler, improved mod, demod and test flow graphs
2019-08-04 01:44:35 +02:00
014fd28f22
First try on IP RX/TX with HackRF
2019-08-01 00:08:04 +02:00
84afe7515b
Moved RX flow graph to separate hier block
2019-07-31 21:46:55 +02:00
4aea636999
Test flowgraphs: completed TX-RX chain
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Now the receiver test flowgraph can demodulate the signal generated by
the TX, including synchronization, error correction and CRC checking.
2019-07-30 23:49:54 +02:00
55cfbd7ab0
Added 16-QAM modulator as GRC hier block + test flowgraph
2019-06-20 17:02:57 +02:00
c1dbbe78c4
Start with hierarchical blocks for mod and demod
2018-12-12 21:12:24 +01:00
Thomas Kolb
Thomas Kolb