Thomas Kolb
665ccd7f84
Added TRX test over UDP
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The idea is to simulate the RF channel by a UDP “connection” between two
hosts.
2019-10-16 22:55:26 +02:00
Thomas Kolb
4707ff6d5c
Added more dependencies to openSUSE setup script
2019-10-16 21:16:08 +02:00
Thomas Kolb
4549d8bbae
Removed legacy OFDM flow graphs
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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
Thomas Kolb
0ff97ff980
Flowgraph cleanup
2019-10-14 21:45:33 +02:00
Thomas Kolb
042d341922
deps: added orc
2019-10-14 21:43:49 +02:00
Thomas Kolb
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
Thomas Kolb
a6046b1458
freq_est_lr: fixed undefined output after startup
2019-09-28 00:08:26 +02:00
Thomas Kolb
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
Thomas Kolb
f38ad55b10
Insert new phase tracker block
2019-09-25 23:53:36 +02:00
Thomas Kolb
6bfcd3d142
make.sh: auto-detect number of CPU cores
2019-09-25 23:53:36 +02:00
Thomas Kolb
1a4b6ec075
Added phase tracker and alignment block for QAM
2019-09-25 23:53:25 +02:00
Thomas Kolb
9107ccc7c0
Extended make.sh
2019-09-19 00:20:44 +02:00
Thomas Kolb
718cf6366e
Completed test flow graph port to GR 3.8
2019-09-19 00:20:23 +02:00
Thomas Kolb
f7575b50fc
symbol_interleaver: fixed calculation bug
2019-09-19 00:19:04 +02:00
Thomas Kolb
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
Thomas Kolb
f003431b8c
Upgrade OOT module to GNU Radio 3.8
2019-09-16 23:02:01 +02:00
Thomas Kolb
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
Thomas Kolb
1c287466db
Added interleaver
2019-09-14 01:23:26 +02:00
Thomas Kolb
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
Thomas Kolb
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
Thomas Kolb
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
6f72013aaa
Added CMake and G++ to dependencies
2019-09-11 19:02:20 +02:00
Thomas Kolb
950124e218
Added frequency offset to RX
2019-08-10 17:23:18 +02:00
Thomas Kolb
bd14eec4e0
Added tun device setup script
2019-08-07 20:18:40 +00:00
Thomas Kolb
58bd3d3c26
Made debug ports optional
2019-08-07 20:00:02 +00:00
Thomas Kolb
164e9d217a
Added dependency install script
2019-08-07 19:59:08 +00:00
Thomas Kolb
9e7dcaf678
Added scrambler, improved mod, demod and test flow graphs
2019-08-04 01:44:35 +02:00
Thomas Kolb
dfc37ecb8d
Added tagged stream and async scrambler blocks
2019-08-04 01:43:43 +02:00
Thomas Kolb
53a06afd69
PID controller: converted to general block; fixed initialization
2019-08-04 01:42:58 +02:00
Thomas Kolb
014fd28f22
First try on IP RX/TX with HackRF
2019-08-01 00:08:04 +02:00
Thomas Kolb
1f04ebdb9a
Added channel coding test flowgraph
2019-07-31 21:47:31 +02:00
Thomas Kolb
84afe7515b
Moved RX flow graph to separate hier block
2019-07-31 21:46:55 +02:00
Thomas Kolb
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
Thomas Kolb
be4ad84982
gr-hamnet70: added a block for delaying tags
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This block is used to mark the start of the actual data, as needed by
the Header/Payload Demultiplexer, instead of the beginning of the
preamble, as needed by the frequency estimator.
2019-07-30 23:48:22 +02:00
Thomas Kolb
664d8fe0e6
Backup commit for the 16 QAM flowgraph
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Now with closed-loop frequency estimation!
2019-07-23 23:20:49 +02:00
Thomas Kolb
cd9784efb6
Added frequency estimator blocks
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- correct_frequency: Correct frequency by averaging the phase drift on
the preamble
- freq_est_lr: Luise & Reggiannini frequency estimator
- pid_controller: a PID controller that takes error values at the input
and generates steering values at the output
The combination of freq_est_lr and PID controller can be used together
with an NCO (signal source) to create a closed control loop for
frequency offset compensation.
2019-07-23 23:16:48 +02:00
Thomas Kolb
55cfbd7ab0
Added 16-QAM modulator as GRC hier block + test flowgraph
2019-06-20 17:02:57 +02:00
Thomas Kolb
0bf421c603
Added gr-hamnet70 OOT module
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This module will contain custom blocks written for GNU Radio.
Up to now, it contains one block for rotating the phase for the amount
given in a specific tag on the stream.
2019-06-20 16:59:30 +02:00
Thomas Kolb
baf0911f14
Ignore some files in git
2019-06-20 16:57:38 +02:00
Thomas Kolb
c1dcc8b0c7
Added utility scripts (RRC filtering)
2019-06-20 16:57:12 +02:00
Thomas Kolb
6565de36c0
Use HAM-64 instead of reinventing the wheel
2019-05-09 00:04:16 +02:00
Thomas Kolb
ff751c725b
doc: Define Flags
2019-01-02 16:18:13 +01:00
Thomas Kolb
c5bc744b25
Added some documentation (using mkdocs)
2019-01-01 19:01:32 +01:00
Thomas Kolb
fffea05647
Added Hamnet70 controller script
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This script manages the interface between the TUN device and GNU Radio.
In the future, it will also do node registration, user scheduling and
other things necessary to run the network.
2018-12-12 21:38:56 +01:00
Thomas Kolb
c1dbbe78c4
Start with hierarchical blocks for mod and demod
2018-12-12 21:12:24 +01:00
Thomas Kolb