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Add LRPT decoder 

Currently it performs only convolutional decoding
This commit is contained in:
Manolis Surligas 2018-08-02 16:17:12 +03:00
parent dcadfe9ab1
commit 854becb15d
8 changed files with 229 additions and 209 deletions
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1
grc/CMakeLists.txt
View File

@ -36,6 +36,7 @@ list(APPEND enabled_blocks
satnogs_fox_telem_mm.xml
satnogs_frame_file_sink.xml
satnogs_iq_sink.xml
satnogs_lrpt_decoder.xml
satnogs_lrpt_sync.xml
satnogs_morse_decoder.xml
satnogs_multi_format_msg_sink.xml

17
grc/satnogs_lrpt_decoder.xml Normal file
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@ -0,0 +1,17 @@
<?xml version="1.0"?>
<block>
<name>LRPT Frame Decoder</name>
<key>satnogs_lrpt_decoder</key>
<import>import satnogs</import>
<make>satnogs.lrpt_decoder()</make>
<sink>
<name>cadu</name>
<type>message</type>
</sink>
<source>
<name>frame</name>
<type>message</type>
</source>
</block>

6
grc/satnogs_lrpt_sync.xml
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@ -21,10 +21,4 @@
<name>cadu</name>
<type>message</type>
</source>
<source>
<name>reset</name>
<type>message</type>
</source>
</block>

345
include/satnogs/utils.h
View File

@ -2,7 +2,7 @@
/*
* gr-satnogs: SatNOGS GNU Radio Out-Of-Tree Module
*
* Copyright (C) 2016, Libre Space Foundation <http://librespacefoundation.org/>
* Copyright (C) 2016,2018 Libre Space Foundation <http://librespacefoundation.org/>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -21,187 +21,198 @@
#ifndef INCLUDE_SATNOGS_UTILS_H_
#define INCLUDE_SATNOGS_UTILS_H_
#include <cstdint>
#include <cmath>
namespace gr
{
namespace satnogs
{
namespace satnogs
{
/**
* Computes the Mean Absolute Percentage Error
* @param ref the reference value
* @param estimation the estimated value
* @return the mean absolute percentage error
*/
static inline double
mape (double ref, double estimation)
{
return std::abs (ref - estimation) / ref;
}
/**
* Computes the Mean Absolute Percentage Error
* @param ref the reference value
* @param estimation the estimated value
* @return the mean absolute percentage error
*/
static inline double
mape (double ref, double estimation)
{
return std::abs (ref - estimation) / ref;
}
/**
* Lookup table for the CCITT CRC16
*/
static const uint16_t crc16_ccitt_table_reverse[256] =
{ 0x0000, 0x1189, 0x2312, 0x329B, 0x4624, 0x57AD, 0x6536, 0x74BF, 0x8C48,
0x9DC1, 0xAF5A, 0xBED3, 0xCA6C, 0xDBE5, 0xE97E, 0xF8F7, 0x1081,
0x0108, 0x3393, 0x221A, 0x56A5, 0x472C, 0x75B7, 0x643E, 0x9CC9,
0x8D40, 0xBFDB, 0xAE52, 0xDAED, 0xCB64, 0xF9FF, 0xE876, 0x2102,
0x308B, 0x0210, 0x1399, 0x6726, 0x76AF, 0x4434, 0x55BD, 0xAD4A,
0xBCC3, 0x8E58, 0x9FD1, 0xEB6E, 0xFAE7, 0xC87C, 0xD9F5, 0x3183,
0x200A, 0x1291, 0x0318, 0x77A7, 0x662E, 0x54B5, 0x453C, 0xBDCB,
0xAC42, 0x9ED9, 0x8F50, 0xFBEF, 0xEA66, 0xD8FD, 0xC974, 0x4204,
0x538D, 0x6116, 0x709F, 0x0420, 0x15A9, 0x2732, 0x36BB, 0xCE4C,
0xDFC5, 0xED5E, 0xFCD7, 0x8868, 0x99E1, 0xAB7A, 0xBAF3, 0x5285,
0x430C, 0x7197, 0x601E, 0x14A1, 0x0528, 0x37B3, 0x263A, 0xDECD,
0xCF44, 0xFDDF, 0xEC56, 0x98E9, 0x8960, 0xBBFB, 0xAA72, 0x6306,
0x728F, 0x4014, 0x519D, 0x2522, 0x34AB, 0x0630, 0x17B9, 0xEF4E,
0xFEC7, 0xCC5C, 0xDDD5, 0xA96A, 0xB8E3, 0x8A78, 0x9BF1, 0x7387,
0x620E, 0x5095, 0x411C, 0x35A3, 0x242A, 0x16B1, 0x0738, 0xFFCF,
0xEE46, 0xDCDD, 0xCD54, 0xB9EB, 0xA862, 0x9AF9, 0x8B70, 0x8408,
0x9581, 0xA71A, 0xB693, 0xC22C, 0xD3A5, 0xE13E, 0xF0B7, 0x0840,
0x19C9, 0x2B52, 0x3ADB, 0x4E64, 0x5FED, 0x6D76, 0x7CFF, 0x9489,
0x8500, 0xB79B, 0xA612, 0xD2AD, 0xC324, 0xF1BF, 0xE036, 0x18C1,
0x0948, 0x3BD3, 0x2A5A, 0x5EE5, 0x4F6C, 0x7DF7, 0x6C7E, 0xA50A,
0xB483, 0x8618, 0x9791, 0xE32E, 0xF2A7, 0xC03C, 0xD1B5, 0x2942,
0x38CB, 0x0A50, 0x1BD9, 0x6F66, 0x7EEF, 0x4C74, 0x5DFD, 0xB58B,
0xA402, 0x9699, 0x8710, 0xF3AF, 0xE226, 0xD0BD, 0xC134, 0x39C3,
0x284A, 0x1AD1, 0x0B58, 0x7FE7, 0x6E6E, 0x5CF5, 0x4D7C, 0xC60C,
0xD785, 0xE51E, 0xF497, 0x8028, 0x91A1, 0xA33A, 0xB2B3, 0x4A44,
0x5BCD, 0x6956, 0x78DF, 0x0C60, 0x1DE9, 0x2F72, 0x3EFB, 0xD68D,
0xC704, 0xF59F, 0xE416, 0x90A9, 0x8120, 0xB3BB, 0xA232, 0x5AC5,
0x4B4C, 0x79D7, 0x685E, 0x1CE1, 0x0D68, 0x3FF3, 0x2E7A, 0xE70E,
0xF687, 0xC41C, 0xD595, 0xA12A, 0xB0A3, 0x8238, 0x93B1, 0x6B46,
0x7ACF, 0x4854, 0x59DD, 0x2D62, 0x3CEB, 0x0E70, 0x1FF9, 0xF78F,
0xE606, 0xD49D, 0xC514, 0xB1AB, 0xA022, 0x92B9, 0x8330, 0x7BC7,
0x6A4E, 0x58D5, 0x495C, 0x3DE3, 0x2C6A, 0x1EF1, 0x0F78 };
/**
* Lookup table for the CCITT CRC16
*/
static const uint16_t crc16_ccitt_table_reverse[256] =
{ 0x0000, 0x1189, 0x2312, 0x329B, 0x4624, 0x57AD, 0x6536, 0x74BF, 0x8C48,
0x9DC1, 0xAF5A, 0xBED3, 0xCA6C, 0xDBE5, 0xE97E, 0xF8F7, 0x1081,
0x0108, 0x3393, 0x221A, 0x56A5, 0x472C, 0x75B7, 0x643E, 0x9CC9,
0x8D40, 0xBFDB, 0xAE52, 0xDAED, 0xCB64, 0xF9FF, 0xE876, 0x2102,
0x308B, 0x0210, 0x1399, 0x6726, 0x76AF, 0x4434, 0x55BD, 0xAD4A,
0xBCC3, 0x8E58, 0x9FD1, 0xEB6E, 0xFAE7, 0xC87C, 0xD9F5, 0x3183,
0x200A, 0x1291, 0x0318, 0x77A7, 0x662E, 0x54B5, 0x453C, 0xBDCB,
0xAC42, 0x9ED9, 0x8F50, 0xFBEF, 0xEA66, 0xD8FD, 0xC974, 0x4204,
0x538D, 0x6116, 0x709F, 0x0420, 0x15A9, 0x2732, 0x36BB, 0xCE4C,
0xDFC5, 0xED5E, 0xFCD7, 0x8868, 0x99E1, 0xAB7A, 0xBAF3, 0x5285,
0x430C, 0x7197, 0x601E, 0x14A1, 0x0528, 0x37B3, 0x263A, 0xDECD,
0xCF44, 0xFDDF, 0xEC56, 0x98E9, 0x8960, 0xBBFB, 0xAA72, 0x6306,
0x728F, 0x4014, 0x519D, 0x2522, 0x34AB, 0x0630, 0x17B9, 0xEF4E,
0xFEC7, 0xCC5C, 0xDDD5, 0xA96A, 0xB8E3, 0x8A78, 0x9BF1, 0x7387,
0x620E, 0x5095, 0x411C, 0x35A3, 0x242A, 0x16B1, 0x0738, 0xFFCF,
0xEE46, 0xDCDD, 0xCD54, 0xB9EB, 0xA862, 0x9AF9, 0x8B70, 0x8408,
0x9581, 0xA71A, 0xB693, 0xC22C, 0xD3A5, 0xE13E, 0xF0B7, 0x0840,
0x19C9, 0x2B52, 0x3ADB, 0x4E64, 0x5FED, 0x6D76, 0x7CFF, 0x9489,
0x8500, 0xB79B, 0xA612, 0xD2AD, 0xC324, 0xF1BF, 0xE036, 0x18C1,
0x0948, 0x3BD3, 0x2A5A, 0x5EE5, 0x4F6C, 0x7DF7, 0x6C7E, 0xA50A,
0xB483, 0x8618, 0x9791, 0xE32E, 0xF2A7, 0xC03C, 0xD1B5, 0x2942,
0x38CB, 0x0A50, 0x1BD9, 0x6F66, 0x7EEF, 0x4C74, 0x5DFD, 0xB58B,
0xA402, 0x9699, 0x8710, 0xF3AF, 0xE226, 0xD0BD, 0xC134, 0x39C3,
0x284A, 0x1AD1, 0x0B58, 0x7FE7, 0x6E6E, 0x5CF5, 0x4D7C, 0xC60C,
0xD785, 0xE51E, 0xF497, 0x8028, 0x91A1, 0xA33A, 0xB2B3, 0x4A44,
0x5BCD, 0x6956, 0x78DF, 0x0C60, 0x1DE9, 0x2F72, 0x3EFB, 0xD68D,
0xC704, 0xF59F, 0xE416, 0x90A9, 0x8120, 0xB3BB, 0xA232, 0x5AC5,
0x4B4C, 0x79D7, 0x685E, 0x1CE1, 0x0D68, 0x3FF3, 0x2E7A, 0xE70E,
0xF687, 0xC41C, 0xD595, 0xA12A, 0xB0A3, 0x8238, 0x93B1, 0x6B46,
0x7ACF, 0x4854, 0x59DD, 0x2D62, 0x3CEB, 0x0E70, 0x1FF9, 0xF78F,
0xE606, 0xD49D, 0xC514, 0xB1AB, 0xA022, 0x92B9, 0x8330, 0x7BC7,
0x6A4E, 0x58D5, 0x495C, 0x3DE3, 0x2C6A, 0x1EF1, 0x0F78 };
static const uint16_t crc16_ccitt_table[256] =
{ 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7, 0x8108,
0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF, 0x1231,
0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6, 0x9339,
0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE, 0x2462,
0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485, 0xA56A,
0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D, 0x3653,
0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4, 0xB75B,
0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC, 0x48C4,
0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823, 0xC9CC,
0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B, 0x5AF5,
0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12, 0xDBFD,
0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A, 0x6CA6,
0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41, 0xEDAE,
0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49, 0x7E97,
0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70, 0xFF9F,
0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78, 0x9188,
0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F, 0x1080,
0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067, 0x83B9,
0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E, 0x02B1,
0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256, 0xB5EA,
0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D, 0x34E2,
0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, 0xA7DB,
0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C, 0x26D3,
0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634, 0xD94C,
0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB, 0x5844,
0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3, 0xCB7D,
0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A, 0x4A75,
0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92, 0xFD2E,
0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9, 0x7C26,
0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1, 0xEF1F,
0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8, 0x6E17,
0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0 };
static const uint16_t crc16_ccitt_table[256] =
{ 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7, 0x8108,
0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF, 0x1231,
0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6, 0x9339,
0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE, 0x2462,
0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485, 0xA56A,
0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D, 0x3653,
0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4, 0xB75B,
0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC, 0x48C4,
0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823, 0xC9CC,
0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B, 0x5AF5,
0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12, 0xDBFD,
0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A, 0x6CA6,
0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41, 0xEDAE,
0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49, 0x7E97,
0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70, 0xFF9F,
0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78, 0x9188,
0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F, 0x1080,
0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067, 0x83B9,
0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E, 0x02B1,
0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256, 0xB5EA,
0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D, 0x34E2,
0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, 0xA7DB,
0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C, 0x26D3,
0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634, 0xD94C,
0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB, 0x5844,
0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3, 0xCB7D,
0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A, 0x4A75,
0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92, 0xFD2E,
0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9, 0x7C26,
0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1, 0xEF1F,
0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8, 0x6E17,
0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0 };
static inline uint16_t
update_crc16_ccitt_reversed (uint16_t crc, const uint8_t *data, size_t len)
{
register size_t i;
for (i = 0; i < len; i++) {
crc = (crc >> 8) ^ crc16_ccitt_table_reverse[(crc ^ data[i]) & 0xff];
}
return crc;
}
static inline uint16_t
update_crc16_ccitt_reversed(uint16_t crc, const uint8_t *data, size_t len)
{
register size_t i;
for (i = 0; i < len; i++) {
crc = (crc >> 8) ^ crc16_ccitt_table_reverse[(crc ^ data[i]) & 0xff];
}
return crc;
}
static inline uint16_t
crc16_ccitt_reversed (const uint8_t *data, size_t len)
{
return update_crc16_ccitt_reversed (0xFFFF, data, len) ^ 0xFFFF;
}
static inline uint16_t
crc16_ccitt_reversed(const uint8_t *data, size_t len)
{
return update_crc16_ccitt_reversed(0xFFFF, data, len) ^ 0xFFFF;
}
static uint16_t
update_crc16_ccitt (uint16_t crc, const uint8_t *buf, size_t len)
{
while (len-- != 0) {
crc = crc16_ccitt_table[((crc >> 8) ^ *buf++) & 0xff] ^ (crc << 8);
}
return crc;
}
static uint16_t
update_crc16_ccitt (uint16_t crc, const uint8_t *buf, size_t len)
{
while (len-- != 0) {
crc = crc16_ccitt_table[((crc >> 8) ^ *buf++) & 0xff] ^ (crc << 8);
}
return crc;
}
static inline uint16_t
crc16_ccitt (const uint8_t *data, size_t len)
{
return update_crc16_ccitt (0x0000, data, len);
}
static inline uint16_t
crc16_ccitt(const uint8_t *data, size_t len)
{
return update_crc16_ccitt(0x0000, data, len);
}
/**
* Counts the number of active bits in x
*/
static inline unsigned int
bit_count (unsigned int x)
{
/*
* Some more magic from
* http://graphics.stanford.edu/~seander/bithacks.html#CountBitsSetParallel
*/
x = x - ((x >> 1) & 0x55555555);
x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
return (((x + (x >> 4)) & 0x0F0F0F0F) * 0x01010101) >> 24;
}
/**
* Counts the number of active bits in x
*/
static inline unsigned int
bit_count (unsigned int x)
{
/*
* Some more magic from
* http://graphics.stanford.edu/~seander/bithacks.html#CountBitsSetParallel
*/
x = x - ((x >> 1) & 0x55555555);
x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
return (((x + (x >> 4)) & 0x0F0F0F0F) * 0x01010101) >> 24;
}
static const uint8_t _bytes_reversed[256] =
{ 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, 0x10, 0x90, 0x50, 0xD0,
0x30, 0xB0, 0x70, 0xF0, 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68,
0xE8, 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8, 0x04, 0x84,
0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4, 0x14, 0x94, 0x54, 0xD4, 0x34,
0xB4, 0x74, 0xF4, 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC,
0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC, 0x02, 0x82, 0x42,
0xC2, 0x22, 0xA2, 0x62, 0xE2, 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2,
0x72, 0xF2, 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA, 0x1A,
0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA, 0x06, 0x86, 0x46, 0xC6,
0x26, 0xA6, 0x66, 0xE6, 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76,
0xF6, 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE, 0x1E, 0x9E,
0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE, 0x01, 0x81, 0x41, 0xC1, 0x21,
0xA1, 0x61, 0xE1, 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9, 0x19, 0x99, 0x59,
0xD9, 0x39, 0xB9, 0x79, 0xF9, 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5,
0x65, 0xE5, 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5, 0x0D,
0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED, 0x1D, 0x9D, 0x5D, 0xDD,
0x3D, 0xBD, 0x7D, 0xFD, 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63,
0xE3, 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3, 0x0B, 0x8B,
0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB, 0x1B, 0x9B, 0x5B, 0xDB, 0x3B,
0xBB, 0x7B, 0xFB, 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7,
0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7, 0x0F, 0x8F, 0x4F,
0xCF, 0x2F, 0xAF, 0x6F, 0xEF, 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF,
0x7F, 0xFF };
static const uint8_t _bytes_reversed[256] =
{ 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, 0x10, 0x90, 0x50, 0xD0,
0x30, 0xB0, 0x70, 0xF0, 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68,
0xE8, 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8, 0x04, 0x84,
0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4, 0x14, 0x94, 0x54, 0xD4, 0x34,
0xB4, 0x74, 0xF4, 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC,
0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC, 0x02, 0x82, 0x42,
0xC2, 0x22, 0xA2, 0x62, 0xE2, 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2,
0x72, 0xF2, 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA, 0x1A,
0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA, 0x06, 0x86, 0x46, 0xC6,
0x26, 0xA6, 0x66, 0xE6, 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76,
0xF6, 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE, 0x1E, 0x9E,
0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE, 0x01, 0x81, 0x41, 0xC1, 0x21,
0xA1, 0x61, 0xE1, 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9, 0x19, 0x99, 0x59,
0xD9, 0x39, 0xB9, 0x79, 0xF9, 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5,
0x65, 0xE5, 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5, 0x0D,
0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED, 0x1D, 0x9D, 0x5D, 0xDD,
0x3D, 0xBD, 0x7D, 0xFD, 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63,
0xE3, 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3, 0x0B, 0x8B,
0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB, 0x1B, 0x9B, 0x5B, 0xDB, 0x3B,
0xBB, 0x7B, 0xFB, 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7,
0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7, 0x0F, 0x8F, 0x4F,
0xCF, 0x2F, 0xAF, 0x6F, 0xEF, 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF,
0x7F, 0xFF };
/**
* Reverse the bits of the byte b.
* @param b the byte to be mirrored.
*/
static inline uint8_t
reverse_byte (uint8_t b)
{
return _bytes_reversed[b];
}
/**
* Reverse the bits of the byte b.
* @param b the byte to be mirrored.
*/
static inline uint8_t
reverse_byte (uint8_t b)
{
return _bytes_reversed[b];
}
static inline uint32_t
reverse_uint32_bytes (uint32_t i)
{
return (_bytes_reversed[i & 0xff] << 24)
| (_bytes_reversed[(i >> 8) & 0xff] << 16)
| (_bytes_reversed[(i >> 16) & 0xff] << 8)
| (_bytes_reversed[(i >> 24) & 0xff]);
}
static inline uint32_t
reverse_uint32_bytes (uint32_t i)
{
return (_bytes_reversed[i & 0xff] << 24)
| (_bytes_reversed[(i >> 8) & 0xff] << 16)
| (_bytes_reversed[(i >> 16) & 0xff] << 8)
| (_bytes_reversed[(i >> 24) & 0xff]);
}
static inline uint64_t
reverse_uint64_bytes (uint64_t x)
{
x = (x & 0x00000000FFFFFFFF) << 32 | (x & 0xFFFFFFFF00000000) >> 32;
x = (x & 0x0000FFFF0000FFFF) << 16 | (x & 0xFFFF0000FFFF0000) >> 16;
x = (x & 0x00FF00FF00FF00FF) << 8 | (x & 0xFF00FF00FF00FF00) >> 8;
return x;
}
} // namespace satnogs
} // namespace satnogs
} // namespace gr

41
lib/lrpt_decoder_impl.cc
View File

@ -25,7 +25,9 @@
#include <gnuradio/io_signature.h>
#include "lrpt_decoder_impl.h"
#include <satnogs/log.h>
#include <fec.h>
extern "C" {
#include <fec.h>
}
namespace gr
{
@ -45,22 +47,18 @@ lrpt_decoder_impl::lrpt_decoder_impl()
: gr::block("lrpt_decoder",
gr::io_signature::make(0, 0, 0),
gr::io_signature::make(0, 0, 0)),
d_cadu_len(1020),
d_coded_cadu_len(1020 * 2),
d_cadu_len(1020 + 4),
d_coded_cadu_len(1020 * 2 + 4*2),
d_conv_deinterl(36, 2048)
{
message_port_register_in(pmt::mp("cadu"));
message_port_register_in(pmt::mp("reset"));
message_port_register_out(pmt::mp("frame"));
set_msg_handler (
pmt::mp ("cadu"),
boost::bind (&lrpt_decoder_impl::decode, this, _1));
set_msg_handler (
pmt::mp ("reset"),
boost::bind (&lrpt_decoder_impl::reset, this, _1));
d_vt = create_viterbi27(d_cadu_len * 8);
if(!d_vt) {
throw std::runtime_error("lrpt_decoder: Failed to init Viterbi decoder");
@ -69,7 +67,7 @@ lrpt_decoder_impl::lrpt_decoder_impl()
set_viterbi27_polynomial(polys);
d_cadu = new uint8_t[d_cadu_len];
d_coded_cadu_deinterl = new uint8_t[d_coded_cadu_len];
d_coded_cadu_syms = new uint8_t[d_coded_cadu_len * 8];
}
@ -80,7 +78,7 @@ lrpt_decoder_impl::~lrpt_decoder_impl ()
{
delete [] d_cadu;
delete [] d_coded_cadu_deinterl;
delete [] d_coded_cadu_syms;
}
void
@ -92,20 +90,23 @@ lrpt_decoder_impl::decode (pmt::pmt_t m)
return;
}
for(size_t i = 0; i < d_coded_cadu_len; i++) {
d_coded_cadu_deinterl[i] = d_conv_deinterl.decode_byte(coded_cadu[i]);
}
init_viterbi27(d_vt, 0);
for(size_t i = 0; i < d_coded_cadu_len; i++) {
d_coded_cadu_syms[i * 8] = ~(255 + (coded_cadu[i] >> 7));
d_coded_cadu_syms[i * 8 + 1] = ~(255 + (coded_cadu[i] >> 6) & 0x1);
d_coded_cadu_syms[i * 8 + 2] = ~(255 + (coded_cadu[i] >> 5) & 0x1);
d_coded_cadu_syms[i * 8 + 3] = ~(255 + (coded_cadu[i] >> 4) & 0x1);
d_coded_cadu_syms[i * 8 + 4] = ~(255 + (coded_cadu[i] >> 3) & 0x1);
d_coded_cadu_syms[i * 8 + 5] = ~(255 + (coded_cadu[i] >> 2) & 0x1);
d_coded_cadu_syms[i * 8 + 6] = ~(255 + (coded_cadu[i] >> 1) & 0x1);
d_coded_cadu_syms[i * 8 + 7] = ~(255 + (coded_cadu[i] & 0x1));
}
update_viterbi27_blk(d_vt, d_coded_cadu_syms, d_cadu_len * 8);
chainback_viterbi27(d_vt, d_cadu, d_cadu_len * 8, 0);
message_port_pub(pmt::mp("frame"), pmt::make_blob(d_cadu, d_cadu_len));
}
void
lrpt_decoder_impl::reset (pmt::pmt_t m)
{
if(pmt::to_bool(m)) {
d_conv_deinterl.reset();
}
}
} /* namespace satnogs */

5
lib/lrpt_decoder_impl.h
View File

@ -40,15 +40,12 @@ private:
const size_t d_cadu_len;
const size_t d_coded_cadu_len;
convolutional_deinterleaver d_conv_deinterl;
uint8_t *d_coded_cadu_deinterl;
uint8_t *d_coded_cadu_syms;
uint8_t *d_cadu;
void *d_vt;
void
decode(pmt::pmt_t m);
void
reset(pmt::pmt_t m);
};
} // namespace satnogs

19
lib/lrpt_sync_impl.cc
View File

@ -25,6 +25,7 @@
#include <gnuradio/io_signature.h>
#include "lrpt_sync_impl.h"
#include <satnogs/log.h>
#include <satnogs/utils.h>
#include <volk/volk.h>
#include <gnuradio/blocks/count_bits.h>
@ -57,7 +58,7 @@ lrpt_sync_impl::lrpt_sync_impl (size_t threshold) :
*/
d_window((72 + 8)/2),
/* Each CADU has the 4 byte ASM and a VCDU of 1020 bytes*/
d_coded_cadu_len(1020 * 2),
d_coded_cadu_len(1020 * 2 + 4*2),
d_frame_sync(false),
d_received(0),
d_rotate(1, 0),
@ -97,10 +98,12 @@ lrpt_sync_impl::lrpt_sync_impl (size_t threshold) :
throw std::runtime_error("lrpt_sync: Could not allocate memory");
}
uint64_t asm_coded = reverse_uint64_bytes(d_asm_coded);
d_coded_cadu = new uint8_t[d_coded_cadu_len];
memcpy(d_coded_cadu, &asm_coded, sizeof(uint64_t));
d_received = sizeof(uint64_t);
message_port_register_out(pmt::mp("cadu"));
message_port_register_out(pmt::mp("reset"));
}
/*
@ -146,7 +149,6 @@ lrpt_sync_impl::work_no_sync(const gr_complex *in, int noutput_items)
if(found_sync(d_shift_reg0)) {
d_rotate = gr_complex(1.0, 0);
d_frame_sync = true;
LOG_ERROR("SYNC");
return i * d_window + j;
}
@ -156,7 +158,6 @@ lrpt_sync_impl::work_no_sync(const gr_complex *in, int noutput_items)
if(found_sync(d_shift_reg1)) {
d_rotate = gr_complex(0.0, 1.0);
d_frame_sync = true;
LOG_ERROR("SYNC");
return i * d_window + j;
}
@ -166,7 +167,6 @@ lrpt_sync_impl::work_no_sync(const gr_complex *in, int noutput_items)
if(found_sync(d_shift_reg2)) {
d_rotate = gr_complex(-1.0, 0);
d_frame_sync = true;
LOG_ERROR("SYNC");
return i * d_window + j;
}
@ -176,7 +176,6 @@ lrpt_sync_impl::work_no_sync(const gr_complex *in, int noutput_items)
if(found_sync(d_shift_reg3)) {
d_rotate = gr_complex(0.0, -1.0);
d_frame_sync = true;
LOG_ERROR("SYNC");
return i * d_window + j;
}
}
@ -192,11 +191,7 @@ lrpt_sync_impl::work_sync(const gr_complex *in, int noutput_items)
for(int i = 0; i < multiple; i++) {
volk_32fc_s32fc_multiply_32fc(d_corrected, in + i * d_window,
d_rotate, d_window);
/*
* Skip UW, for now
* NOTE: UW is unencoded
*/
for(int j = 0; j < d_window - 4; j += 4) {
for(int j = 0; j < d_window; j += 4) {
b = 0;
b = d_qpsk->decision_maker(d_corrected + j) << 6;
b |= d_qpsk->decision_maker(d_corrected + j + 1) << 4;
@ -206,7 +201,7 @@ lrpt_sync_impl::work_sync(const gr_complex *in, int noutput_items)
d_coded_cadu[d_received++] = b;
if(d_received == d_coded_cadu_len) {
LOG_ERROR("frame");
d_received = 0;
d_received = sizeof(uint64_t);
d_frame_sync = false;
message_port_pub (pmt::mp ("cadu"),
pmt::make_blob (d_coded_cadu, d_coded_cadu_len));

4
swig/satnogs_swig0.i
View File

@ -35,6 +35,7 @@
#include "satnogs/decoder_8b10b.h"
#include "satnogs/ccsds_rs_decoder_mm.h"
#include "satnogs/fox_telem_mm.h"
#include "satnogs/lrpt_decoder.h"
#include "satnogs/lrpt_sync.h"
%}
@ -117,3 +118,6 @@ GR_SWIG_BLOCK_MAGIC2(satnogs, fox_telem_mm);
%include "satnogs/lrpt_sync.h"
GR_SWIG_BLOCK_MAGIC2(satnogs, lrpt_sync);
%include "satnogs/lrpt_decoder.h"
GR_SWIG_BLOCK_MAGIC2(satnogs, lrpt_decoder);