kopia lustrzana https://github.com/M17-Project/M17_Implementations
136 wiersze
6.4 KiB
C
136 wiersze
6.4 KiB
C
//--------------------------------------------------------------------
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// M17 C library - m17consts.c
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//
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// Wojciech Kaczmarski, SP5WWP
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// M17 Project, 29 December 2023
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//--------------------------------------------------------------------
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#include "m17consts.h"
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//syncword patterns (RX) TODO:Compute those at runtime from the consts below
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const int8_t lsf_sync[8]={+3, +3, +3, +3, -3, -3, +3, -3};
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const int8_t str_sync[8]={-3, -3, -3, -3, +3, +3, -3, +3};
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const int8_t pkt_sync[8]={+3, -3, +3, +3, -3, -3, -3, -3};
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//symbol levels (RX)
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const float symbs[4]={-3.0, -1.0, +1.0, +3.0};
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//dibits-symbols map (TX)
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const int8_t symbol_map[4]={+1, +3, -1, -3};
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//syncwords
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const uint16_t SYNC_LSF = 0x55F7;
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const uint16_t SYNC_STR = 0xFF5D;
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const uint16_t SYNC_PKT = 0x75FF;
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const uint16_t SYNC_BER = 0xDF55;
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const uint16_t EOT_MRKR = 0x555D;
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//puncturing pattern P_1
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const uint8_t P_1[61]={1,1,0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,
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1,0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,
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1,0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,
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1,0,1,1,1,0,1,1,1,0,1,1};
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//puncturing pattern P_2
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const uint8_t P_2[12]={1,1,1,1,1,1,1,1,1,1,1,0};
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//puncturing pattern P_3
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const uint8_t P_3[8]={1,1,1,1,1,1,1,0};
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//M17 CRC polynomial
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const uint16_t M17_CRC_POLY = 0x5935;
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//sample RRC filter for 48kHz sample rate
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//alpha=0.5, span=8, sps=10, gain=sqrt(sps)
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const float taps_10[8*10+1]=
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{
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-0.003195702904062073f, -0.002930279157647190f, -0.001940667871554463f,
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-0.000356087678023658f, 0.001547011339077758f, 0.003389554791179751f,
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0.004761898604225673f, 0.005310860846138910f, 0.004824746306020221f,
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0.003297923526848786f, 0.000958710871218619f, -0.001749908029791816f,
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-0.004238694106631223f, -0.005881783042101693f, -0.006150256456781309f,
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-0.004745376707651645f, -0.001704189656473565f, 0.002547854551539951f,
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0.007215575568844704f, 0.011231038205363532f, 0.013421952197060707f,
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0.012730475385624438f, 0.008449554307303753f, 0.000436744366018287f,
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-0.010735380379191660f, -0.023726883538258272f, -0.036498030780605324f,
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-0.046500883189991064f, -0.050979050575999614f, -0.047340680079891187f,
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-0.033554880492651755f, -0.008513823955725943f, 0.027696543159614194f,
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0.073664520037517042f, 0.126689053778116234f, 0.182990955139333916f,
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0.238080025892859704f, 0.287235637987091563f, 0.326040247765297220f,
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0.350895727088112619f, 0.359452932027607974f, 0.350895727088112619f,
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0.326040247765297220f, 0.287235637987091563f, 0.238080025892859704f,
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0.182990955139333916f, 0.126689053778116234f, 0.073664520037517042f,
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0.027696543159614194f, -0.008513823955725943f, -0.033554880492651755f,
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-0.047340680079891187f, -0.050979050575999614f, -0.046500883189991064f,
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-0.036498030780605324f, -0.023726883538258272f, -0.010735380379191660f,
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0.000436744366018287f, 0.008449554307303753f, 0.012730475385624438f,
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0.013421952197060707f, 0.011231038205363532f, 0.007215575568844704f,
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0.002547854551539951f, -0.001704189656473565f, -0.004745376707651645f,
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-0.006150256456781309f, -0.005881783042101693f, -0.004238694106631223f,
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-0.001749908029791816f, 0.000958710871218619f, 0.003297923526848786f,
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0.004824746306020221f, 0.005310860846138910f, 0.004761898604225673f,
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0.003389554791179751f, 0.001547011339077758f, -0.000356087678023658f,
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-0.001940667871554463f, -0.002930279157647190f, -0.003195702904062073f
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};
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//sample RRC filter for 24kHz sample rate
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//alpha=0.5, span=8, sps=5, gain=sqrt(sps)
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const float taps_5[8*5+1]=
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{
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-0.004519384154389f, -0.002744505321971f,
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0.002187793653660f, 0.006734308458208f,
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0.006823188093192f, 0.001355815246317f,
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-0.005994389201970f, -0.008697733303330f,
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-0.002410076268276f, 0.010204314627992f,
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0.018981413448435f, 0.011949415510291f,
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-0.015182045838927f, -0.051615756197679f,
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-0.072094910038768f, -0.047453533621088f,
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0.039168634270669f, 0.179164496628150f,
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0.336694345124862f, 0.461088271869920f,
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0.508340710642860f, 0.461088271869920f,
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0.336694345124862f, 0.179164496628150f,
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0.039168634270669f, -0.047453533621088f,
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-0.072094910038768f, -0.051615756197679f,
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-0.015182045838927f, 0.011949415510291f,
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0.018981413448435f, 0.010204314627992f,
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-0.002410076268276f, -0.008697733303330f,
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-0.005994389201970f, 0.001355815246317f,
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0.006823188093192f, 0.006734308458208f,
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0.002187793653660f, -0.002744505321971f,
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-0.004519384154389f
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};
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//randomizing pattern
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const uint8_t rand_seq[46]=
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{
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0xD6, 0xB5, 0xE2, 0x30, 0x82, 0xFF, 0x84, 0x62, 0xBA, 0x4E, 0x96, 0x90, 0xD8, 0x98, 0xDD, 0x5D, 0x0C, 0xC8, 0x52, 0x43, 0x91, 0x1D, 0xF8,
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0x6E, 0x68, 0x2F, 0x35, 0xDA, 0x14, 0xEA, 0xCD, 0x76, 0x19, 0x8D, 0xD5, 0x80, 0xD1, 0x33, 0x87, 0x13, 0x57, 0x18, 0x2D, 0x29, 0x78, 0xC3
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};
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//interleaver pattern
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const uint16_t intrl_seq[368]=
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{
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0, 137, 90, 227, 180, 317, 270, 39, 360, 129, 82, 219, 172, 309, 262, 31,
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352, 121, 74, 211, 164, 301, 254, 23, 344, 113, 66, 203, 156, 293, 246, 15,
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336, 105, 58, 195, 148, 285, 238, 7, 328, 97, 50, 187, 140, 277, 230, 367,
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320, 89, 42, 179, 132, 269, 222, 359, 312, 81, 34, 171, 124, 261, 214, 351,
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304, 73, 26, 163, 116, 253, 206, 343, 296, 65, 18, 155, 108, 245, 198, 335,
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288, 57, 10, 147, 100, 237, 190, 327, 280, 49, 2, 139, 92, 229, 182, 319,
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272, 41, 362, 131, 84, 221, 174, 311, 264, 33, 354, 123, 76, 213, 166, 303,
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256, 25, 346, 115, 68, 205, 158, 295, 248, 17, 338, 107, 60, 197, 150, 287,
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240, 9, 330, 99, 52, 189, 142, 279, 232, 1, 322, 91, 44, 181, 134, 271,
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224, 361, 314, 83, 36, 173, 126, 263, 216, 353, 306, 75, 28, 165, 118, 255,
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208, 345, 298, 67, 20, 157, 110, 247, 200, 337, 290, 59, 12, 149, 102, 239,
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192, 329, 282, 51, 4, 141, 94, 231, 184, 321, 274, 43, 364, 133, 86, 223,
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176, 313, 266, 35, 356, 125, 78, 215, 168, 305, 258, 27, 348, 117, 70, 207,
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160, 297, 250, 19, 340, 109, 62, 199, 152, 289, 242, 11, 332, 101, 54, 191,
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144, 281, 234, 3, 324, 93, 46, 183, 136, 273, 226, 363, 316, 85, 38, 175,
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128, 265, 218, 355, 308, 77, 30, 167, 120, 257, 210, 347, 300, 69, 22, 159,
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112, 249, 202, 339, 292, 61, 14, 151, 104, 241, 194, 331, 284, 53, 6, 143,
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96, 233, 186, 323, 276, 45, 366, 135, 88, 225, 178, 315, 268, 37, 358, 127,
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80, 217, 170, 307, 260, 29, 350, 119, 72, 209, 162, 299, 252, 21, 342, 111,
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64, 201, 154, 291, 244, 13, 334, 103, 56, 193, 146, 283, 236, 5, 326, 95,
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48, 185, 138, 275, 228, 365, 318, 87, 40, 177, 130, 267, 220, 357, 310, 79,
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32, 169, 122, 259, 212, 349, 302, 71, 24, 161, 114, 251, 204, 341, 294, 63,
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16, 153, 106, 243, 196, 333, 286, 55, 8, 145, 98, 235, 188, 325, 278, 47
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};
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