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https://github.com/f4exb/sdrangel.git
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113 lines
8.1 KiB
C++
113 lines
8.1 KiB
C++
#include "M17Modulator.h"
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namespace modemm17
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{
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/*
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sync_word_t preamble_sync{{+3, -3, +3, -3, +3, -3, +3, -3}, 29.f};
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sync_word_t lsf_sync{ {+3, +3, +3, +3, -3, -3, +3, -3}, 32.f, -31.f}; // LSF or STREAM (inverted)
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sync_word_t packet_sync{ {+3, -3, +3, +3, -3, -3, -3, -3}, 31.f, -31.f}; // PACKET or BERT (inverted)
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*/
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const std::array<uint8_t, 2> M17Modulator::SYNC_WORD = {0x32, 0x43}; // 00 11 00 10 01 00 00 11 | +1 -3 +1 -1 +3 +1 +1 -3 ????
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const std::array<uint8_t, 2> M17Modulator::LSF_SYNC_WORD = {0x55, 0xF7}; // 01 01 01 01 11 11 01 11 | +3 +3 +3 +3 -3 -3 +3 -3
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const std::array<uint8_t, 2> M17Modulator::STREAM_SYNC_WORD = {0xFF, 0x5D}; // 11 11 11 11 01 01 11 01 | -3 -3 -3 -3 +3 +3 -3 +3
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const std::array<uint8_t, 2> M17Modulator::PACKET_SYNC_WORD = {0x75, 0xFF}; // 01 11 01 01 11 11 11 11 | +3 -3 +3 +3 -3 -3 -3 -3
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const std::array<uint8_t, 2> M17Modulator::BERT_SYNC_WORD = {0xDF, 0x55}; // 11 01 11 11 01 01 01 01 | -3 +3 -3 -3 +3 +3 +3 +3
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const std::array<uint8_t, 2> M17Modulator::EOT_SYNC = {0x55, 0x5D}; // ????
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// Generated using scikit-commpy
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// const std::array<float, 150> M17Modulator::rrc_taps = std::array<float, 150>{
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// 0.0029364388513841593, 0.0031468394550958484, 0.002699564567597445, 0.001661182944400927, 0.00023319405581230247, // 5
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// -0.0012851320781224025, -0.0025577136087664687, -0.0032843366522956313, -0.0032697038088887226, -0.0024733964729590865, // 10
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// -0.0010285696910973807, 0.0007766690889758685, 0.002553421969211845, 0.0038920145144327816, 0.004451886520053017, // 15
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// 0.00404219185231544, 0.002674727068399207, 0.0005756567993179152, -0.0018493784971116507, -0.004092346891623224, // 20
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// -0.005648131453822014, -0.006126925416243605, -0.005349511529163396, -0.003403189203405097, -0.0006430502751187517, // 25
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// 0.002365929161655135, 0.004957956568090113, 0.006506845894531803, 0.006569574194782443, 0.0050017573119839134, // 30
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// 0.002017321931508163, -0.0018256054303579805, -0.00571615173291049, -0.008746639552588416, -0.010105075751866371, // 35
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// -0.009265784007800534, -0.006136551625729697, -0.001125978562075172, 0.004891777252042491, 0.01071805138282269, // 40
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// 0.01505751553351295, 0.01679337935001369, 0.015256245142156299, 0.01042830577908502, 0.003031522725559901, // 45
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// -0.0055333532968188165, -0.013403099825723372, -0.018598682349642525, -0.01944761739590459, -0.015005271935951746, // 50
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// -0.0053887880354343935, 0.008056525910253532, 0.022816244158307273, 0.035513467692208076, 0.04244131815783876, // 55
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// 0.04025481153629372, 0.02671818654865632, 0.0013810216516704976, -0.03394615682795165, -0.07502635967975885, // 60
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// -0.11540977897637611, -0.14703962203941534, -0.16119995609538576, -0.14969512896336504, -0.10610329539459686, // 65
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// -0.026921412469634916, 0.08757875030779196, 0.23293327870303457, 0.4006012210123992, 0.5786324696325503, // 70
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// 0.7528286479934068, 0.908262741447522, 1.0309661131633199, 1.1095611856548013, 1.1366197723675815, // 75
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// 1.1095611856548013, 1.0309661131633199, 0.908262741447522, 0.7528286479934068, 0.5786324696325503, // 80
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// 0.4006012210123992, 0.23293327870303457, 0.08757875030779196, -0.026921412469634916, -0.10610329539459686, // 85
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// -0.14969512896336504, -0.16119995609538576, -0.14703962203941534, -0.11540977897637611, -0.07502635967975885, // 90
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// -0.03394615682795165, 0.0013810216516704976, 0.02671818654865632, 0.04025481153629372, 0.04244131815783876, // 95
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// 0.035513467692208076, 0.022816244158307273, 0.008056525910253532, -0.0053887880354343935, -0.015005271935951746, // 100
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// -0.01944761739590459, -0.018598682349642525, -0.013403099825723372, -0.0055333532968188165, 0.003031522725559901, // 105
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// 0.01042830577908502, 0.015256245142156299, 0.01679337935001369, 0.01505751553351295, 0.01071805138282269, // 110
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// 0.004891777252042491, -0.001125978562075172, -0.006136551625729697, -0.009265784007800534, -0.010105075751866371, // 115
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// -0.008746639552588416, -0.00571615173291049, -0.0018256054303579805, 0.002017321931508163, 0.0050017573119839134, // 120
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// 0.006569574194782443, 0.006506845894531803, 0.004957956568090113, 0.002365929161655135, -0.0006430502751187517, // 125
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// -0.003403189203405097, -0.005349511529163396, -0.006126925416243605, -0.005648131453822014, -0.004092346891623224, // 130
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// -0.0018493784971116507, 0.0005756567993179152, 0.002674727068399207, 0.00404219185231544, 0.004451886520053017, // 135
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// 0.0038920145144327816, 0.002553421969211845, 0.0007766690889758685, -0.0010285696910973807, -0.0024733964729590865, // 140
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// -0.0032697038088887226, -0.0032843366522956313, -0.0025577136087664687, -0.0012851320781224025, 0.00023319405581230247, // 145
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// 0.001661182944400927, 0.002699564567597445, 0.0031468394550958484, 0.0029364388513841593, 0.0 // 150
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// };
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// Generated using scikit-commpy N = 150, alpha = 0.5, Ts = 1/4800 s, Fs = 48000 Hz
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/*
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import sys
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import commpy.filters
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N = 150
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alpha=float(sys.argv[1])
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tsymbol = 1/4800
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fs = 48000
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print(f'N={N} alpha={alpha} tsym={tsymbol} fs={fs}')
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t, h = commpy.filters.rrcosfilter(N, alpha, tsymbol, fs)
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line = " "
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print(len(h))
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for i, coeff in enumerate(h):
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line += f'{coeff:+e}, '
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if (i+1) % 5 == 0:
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print(line)
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line = " "
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print("")
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*/
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const std::array<float, 150> M17Modulator::rrc_taps = std::array<float, 150>{
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-8.434122e-04, +3.898184e-04, +1.628891e-03, +2.576674e-03, +2.987740e-03,
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+2.729505e-03, +1.820181e-03, +4.333001e-04, -1.134215e-03, -2.525029e-03,
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-3.402452e-03, -3.531573e-03, -2.841363e-03, -1.451929e-03, +3.417005e-04,
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+2.128236e-03, +3.470212e-03, +4.006361e-03, +3.543024e-03, +2.112321e-03,
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-1.893023e-05, -2.395144e-03, -4.465932e-03, -5.709548e-03, -5.759027e-03,
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-4.501582e-03, -2.125844e-03, +8.982825e-04, +3.907892e-03, +6.188389e-03,
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+7.139194e-03, +6.427125e-03, +4.090469e-03, +5.649447e-04, -3.381677e-03,
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-6.799652e-03, -8.765190e-03, -8.603529e-03, -6.076811e-03, -1.489520e-03,
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+4.321674e-03, +1.012385e-02, +1.453219e-02, +1.631886e-02, +1.472302e-02,
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+9.691259e-03, +1.984723e-03, -6.888307e-03, -1.492227e-02, -2.001531e-02,
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-2.045303e-02, -1.538011e-02, -5.154591e-03, +8.509368e-03, +2.267330e-02,
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+3.359618e-02, +3.740502e-02, +3.091849e-02, +1.248579e-02, -1.731807e-02,
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-5.529141e-02, -9.561492e-02, -1.303248e-01, -1.502279e-01, -1.461577e-01,
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-1.104008e-01, -3.808012e-02, +7.173159e-02, +2.153664e-01, +3.845237e-01,
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+5.668902e-01, +7.473693e-01, +9.097718e-01, +1.038746e+00, +1.121677e+00,
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+1.150282e+00, +1.121677e+00, +1.038746e+00, +9.097718e-01, +7.473693e-01,
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+5.668902e-01, +3.845237e-01, +2.153664e-01, +7.173159e-02, -3.808012e-02,
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-1.104008e-01, -1.461577e-01, -1.502279e-01, -1.303248e-01, -9.561492e-02,
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-5.529141e-02, -1.731807e-02, +1.248579e-02, +3.091849e-02, +3.740502e-02,
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+3.359618e-02, +2.267330e-02, +8.509368e-03, -5.154591e-03, -1.538011e-02,
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-2.045303e-02, -2.001531e-02, -1.492227e-02, -6.888307e-03, +1.984723e-03,
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+9.691259e-03, +1.472302e-02, +1.631886e-02, +1.453219e-02, +1.012385e-02,
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+4.321674e-03, -1.489520e-03, -6.076811e-03, -8.603529e-03, -8.765190e-03,
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-6.799652e-03, -3.381677e-03, +5.649447e-04, +4.090469e-03, +6.427125e-03,
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+7.139194e-03, +6.188389e-03, +3.907892e-03, +8.982825e-04, -2.125844e-03,
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-4.501582e-03, -5.759027e-03, -5.709548e-03, -4.465932e-03, -2.395144e-03,
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-1.893023e-05, +2.112321e-03, +3.543024e-03, +4.006361e-03, +3.470212e-03,
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+2.128236e-03, +3.417005e-04, -1.451929e-03, -2.841363e-03, -3.531573e-03,
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-3.402452e-03, -2.525029e-03, -1.134215e-03, +4.333001e-04, +1.820181e-03,
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+2.729505e-03, +2.987740e-03, +2.576674e-03, +1.628891e-03, +3.898184e-04,
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};
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} // namespace modemm17
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