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119 commits 13 branches 1 tag 360 KiB
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71 commits

Author SHA1 Message Date
Ahmet Inan
77719cc63b added more shuffles 2025-06-25 16:39:28 +02:00
Ahmet Inan
4cb15194aa replaced Fisher-Yates shuffle with XorShiftMask mapping 2025-06-25 12:35:32 +02:00
Ahmet Inan
f92a24eb5a use non-systematic polar codes 2025-06-25 11:54:53 +02:00
Ahmet Inan
a56466c08f added support for multiple input and output files 2024-01-25 17:26:36 +01:00
Ahmet Inan
6523f6f701 added scale parameter 2024-01-24 14:55:47 +01:00
Ahmet Inan
2d765a78fd start parity bits early, as we use a crc at the end 2024-01-21 11:01:18 +01:00
Ahmet Inan
d69dd7aa03 use parity aided polar codes 2024-01-20 23:13:58 +01:00
Ahmet Inan
ad5f0e04ea removed rattlegram modes 2024-01-20 18:16:30 +01:00
Ahmet Inan
390a11e5dc revised modes to better amortize the preamble cost 
.. and to have a larger minimum size payload of 256 bytes
 2024-01-05 13:24:49 +01:00
Ahmet Inan
c597ac3398 added rattlegram modes 2024-01-03 18:12:48 +01:00
Ahmet Inan
88e8a3ad94 replaced frequency offset paramter with operation mode 2024-01-03 17:22:12 +01:00
Ahmet Inan
41472f6f77 allow up to 10% of constellation point distance 2023-12-26 13:48:49 +01:00
Ahmet Inan
fff6c60bbe added six new modes 
Mode 23: DQPSK, 1/2-rate code, 1600 Hz bandwidth and 1.08 seconds
Mode 24: DQPSK, 3/4-rate code, 1600 Hz bandwidth and 1.08 seconds
Mode 25: QAM16, 1/2-rate code, 1700 Hz bandwidth and 1.08 seconds
Mode 26: QAM16, 3/4-rate code, 1700 Hz bandwidth and 1.08 seconds
Mode 27: QAM64, 2/3-rate code, 1900 Hz bandwidth and 1.26 seconds
Mode 28: QAM64, 3/4-rate code, 1900 Hz bandwidth and 1.26 seconds
 2023-12-26 11:28:56 +01:00
Ahmet Inan
b93079de81 compensate using comb type pilots 2023-12-18 13:23:13 +01:00
Ahmet Inan
71cc33e481 do unlimited clipping before the PCM writer does it 2023-12-18 10:13:32 +01:00
Ahmet Inan
d978bb0be6 base modulation order from mod_bits 2023-12-17 11:45:01 +01:00
Ahmet Inan
513664a0e3 shuffle the code bits 2023-12-16 08:30:47 +01:00
Ahmet Inan
dc1a5b2ef7 removed the extra pilot block 2023-12-16 08:05:17 +01:00
Ahmet Inan
7a87215eb3 doubled symbols and payload size 2023-12-15 20:17:38 +01:00
Ahmet Inan
cd9d912711 changed four QPSK symbols to two QAM16 symbols 2023-12-15 19:14:58 +01:00
Ahmet Inan
d1a2ec19f0 added three new, non-differential modes 2023-12-15 18:38:54 +01:00
Ahmet Inan
a37246b7a0 limit the amount of damage clipping can do 2023-12-15 12:51:54 +01:00
Ahmet Inan
4d63fc5df0 keep it simple 2023-12-15 11:54:11 +01:00
Ahmet Inan
ae4d601e96 added reserved tones parameter 2023-12-15 11:44:47 +01:00
Ahmet Inan
5eb0e100a7 let's seem them both work together 2023-12-15 10:50:29 +01:00
Ahmet Inan
ace307de9c increased amplitude to see PAPR reduction work 2023-12-15 10:45:50 +01:00
Ahmet Inan
c8f1096474 allow up to a hundred iterations 2023-12-15 10:35:16 +01:00
Ahmet Inan
0b99170d62 eight reserved tones are enough 2023-12-14 16:56:34 +01:00
Ahmet Inan
d32860f7af derive from number of reserved tones 2023-12-14 16:56:34 +01:00
Ahmet Inan
c851ed2a5a stop papr reduction if goal is reached 2023-12-14 16:56:27 +01:00
Ahmet Inan
d3a37c9e83 use the tone reservation technique to improve PAPR 2023-12-14 10:51:43 +01:00
Ahmet Inan
bf382cfe77 improved some names 2023-12-14 10:23:21 +01:00
Ahmet Inan
b2c0e56c4f compute the complex PAPR 
even though we only use the real part
 2023-12-14 09:14:58 +01:00
Ahmet Inan
0cf139ddaf we already are oversampled 2023-12-14 08:51:25 +01:00
Ahmet Inan
7c693b1075 set default CFO to 1500 Hz 2023-03-08 08:32:39 +01:00
Ahmet Inan
6f58e93018 added support for modes 0, 15 and 16 2023-01-04 15:37:23 +01:00
Ahmet Inan
d3075d33c9 replace EOF with null terminator 2022-12-25 16:24:05 +01:00
Ahmet Inan
34fd021161 use only 50% of the suffix for windowing 2022-12-23 13:35:09 +01:00
Ahmet Inan
41795780cb added mode 14 for short messages 
using SPC(2048, 1392), QPSK, 1600 Hz BW and about 1 second long
 2022-05-18 23:14:26 +02:00
Ahmet Inan
0fac5fc62b added prepare() 2021-10-08 11:30:20 +02:00
Ahmet Inan
d22e18bb91 omit postamble 2021-10-06 17:26:30 +02:00
Ahmet Inan
da855f6510 replace "-" with "/dev/stdin" or "/dev/stdout" 2021-09-12 10:15:47 +02:00
Ahmet Inan
b7855e2c2c use operation mode zero to signal end of transmission 2021-09-06 08:22:56 +02:00
Ahmet Inan
99b6a4e963 use a shortened systematic polar code and CA-SCL decoding 
using SPC(64800, 43072):
mode 6: 8PSK, 2700 Hz BW and about 10 seconds long
mode 7: 8PSK, 2500 Hz BW and about 11 seconds long
mode 8: QPSK, 2500 Hz BW and about 16 seconds long
mode 9: QPSK, 2250 Hz BW and about 18 seconds long

using SPC(64512, 43072):
mode 10: 8PSK, 3200 Hz BW and about 9 seconds long
mode 11: 8PSK, 2400 Hz BW and about 11 seconds long
mode 12: QPSK, 2400 Hz BW and about 16 seconds long
mode 13: QPSK, 1600 Hz BW and about 24 seconds long
 2021-09-03 20:52:09 +02:00
Ahmet Inan
a3a56bc830 freq offset needs to be divisible by 50. 
use disorders/cfo if you need finer control
 2021-09-03 20:50:33 +02:00
Ahmet Inan
1d02d34e8c Revert "increased guard interval to 1/4" 
This reverts commit 7c7ed0ffd7.
 2021-08-25 11:41:02 +02:00
Ahmet Inan
5270c7d38f increase power of S&C symbol by two 2021-08-20 21:12:58 +02:00
Ahmet Inan
c81f3a15f9 skip PAPR reduction on S&C symbol 2021-08-20 21:09:00 +02:00
Ahmet Inan
7c7ed0ffd7 increased guard interval to 1/4 
to reduce ISI and support sample rates 11025 Hz and 22050 Hz
 2021-07-27 13:14:00 +02:00
Ahmet Inan
8d5d7fc0c2 use the DVB recommended T=10 BCH code 2021-07-21 17:15:47 +02:00