Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 1 | /* |
| 2 | * (C) 2013 by Andreas Eversberg <jolly@eversberg.eu> |
| 3 | * (C) 2016 by Tom Tsou <tom.tsou@ettus.com> |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 4 | * (C) 2017 by Hrald Welte <laforge@gnumonks.org> |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 5 | * |
| 6 | * All Rights Reserved |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License along |
| 19 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 20 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 21 | */ |
| 22 | |
| 23 | #include <stdint.h> |
| 24 | #include <string.h> |
| 25 | |
| 26 | #include <osmocom/core/bits.h> |
| 27 | #include <osmocom/coding/gsm0503_tables.h> |
| 28 | #include <osmocom/coding/gsm0503_interleaving.h> |
| 29 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 30 | /*! \addtogroup interleaving |
| 31 | * @{ |
| 32 | * \brief GSM TS 05.03 interleaving |
| 33 | * |
| 34 | * This module contains interleaving / de-interleaving routines for |
| 35 | * various channel types, as defined in 3GPP TS 05.03 / 45.003 |
| 36 | */ |
| 37 | |
| 38 | /*! \file gsm0503_interleaving.c */ |
| 39 | |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 40 | /* |
| 41 | * GSM xCCH interleaving and burst mapping |
| 42 | * |
| 43 | * Interleaving: |
| 44 | * |
| 45 | * Given 456 coded input bits, form 4 blocks of 114 bits: |
| 46 | * |
| 47 | * i(B, j) = c(n, k) k = 0, ..., 455 |
| 48 | * n = 0, ..., N, N + 1, ... |
| 49 | * B = B_0 + 4n + (k mod 4) |
| 50 | * j = 2(49k mod 57) + ((k mod 8) div 4) |
| 51 | * |
| 52 | * Mapping on Burst: |
| 53 | * |
| 54 | * e(B, j) = i(B, j) |
| 55 | * e(B, 59 + j) = i(B, 57 + j) j = 0, ..., 56 |
| 56 | * e(B, 57) = h_l(B) |
| 57 | * e(B, 58) = h_n(B) |
| 58 | * |
| 59 | * Where hl(B) and hn(B) are bits in burst B indicating flags. |
| 60 | */ |
| 61 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 62 | /*! \brief De-Interleave burst bits according to TS 05.03 4.1.4 |
| 63 | * \param[out] cB caller-allocated output buffer for 456 soft coded bits |
| 64 | * \param[in] iB 456 soft input bits */ |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 65 | void gsm0503_xcch_deinterleave(sbit_t *cB, const sbit_t *iB) |
| 66 | { |
| 67 | int j, k, B; |
| 68 | |
| 69 | for (k = 0; k < 456; k++) { |
| 70 | B = k & 3; |
| 71 | j = 2 * ((49 * k) % 57) + ((k & 7) >> 2); |
| 72 | cB[k] = iB[B * 114 + j]; |
| 73 | } |
| 74 | } |
| 75 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 76 | /*! \brief Interleave burst bits according to TS 05.03 4.1.4 |
| 77 | * \param[out] iB caller-allocated output buffer for 456 soft interleaved bits |
| 78 | * \param[in] cB 456 soft input coded bits */ |
Harald Welte | 0eb2c5d | 2017-06-12 15:03:11 +0200 | [diff] [blame] | 79 | void gsm0503_xcch_interleave(const ubit_t *cB, ubit_t *iB) |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 80 | { |
| 81 | int j, k, B; |
| 82 | |
| 83 | for (k = 0; k < 456; k++) { |
| 84 | B = k & 3; |
| 85 | j = 2 * ((49 * k) % 57) + ((k & 7) >> 2); |
| 86 | iB[B * 114 + j] = cB[k]; |
| 87 | } |
| 88 | } |
| 89 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 90 | /*! \brief De-Interleave MCS1 DL burst bits according to TS 05.03 5.1.5.1.5 |
| 91 | * \param[out] u caller-allocated output buffer for 12 soft coded bits |
| 92 | * \param[out] hc caller-allocated output buffer for 68 soft coded bits |
| 93 | * \param[out] dc caller-allocated output buffer for 372 soft coded bits |
| 94 | * \param[in] iB 452 interleaved soft input bits */ |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 95 | void gsm0503_mcs1_dl_deinterleave(sbit_t *u, sbit_t *hc, |
| 96 | sbit_t *dc, const sbit_t *iB) |
| 97 | { |
| 98 | int k; |
| 99 | sbit_t c[452]; |
| 100 | sbit_t cp[456]; |
| 101 | |
| 102 | gsm0503_xcch_deinterleave(cp, iB); |
| 103 | |
| 104 | for (k = 0; k < 25; k++) |
| 105 | c[k] = cp[k]; |
| 106 | for (k = 26; k < 82; k++) |
| 107 | c[k - 1] = cp[k]; |
| 108 | for (k = 83; k < 139; k++) |
| 109 | c[k - 2] = cp[k]; |
| 110 | for (k = 140; k < 424; k++) |
| 111 | c[k - 3] = cp[k]; |
| 112 | for (k = 425; k < 456; k++) |
| 113 | c[k - 4] = cp[k]; |
| 114 | |
| 115 | if (u) { |
| 116 | for (k = 0; k < 12; k++) |
| 117 | u[k] = c[k]; |
| 118 | } |
| 119 | |
| 120 | if (hc) { |
| 121 | for (k = 12; k < 80; k++) |
| 122 | hc[k - 12] = c[k]; |
| 123 | } |
| 124 | |
| 125 | if (dc) { |
| 126 | for (k = 80; k < 452; k++) |
| 127 | dc[k - 80] = c[k]; |
| 128 | } |
| 129 | } |
| 130 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 131 | /*! \brief Interleave MCS1 DL burst bits according to TS 05.03 5.1.5.1.5 |
| 132 | * \param[in] up 12 input soft coded bits (usf) |
| 133 | * \param[in] hc 68 input soft coded bits (header) |
| 134 | * \param[in] dc 372 input soft bits (data) |
| 135 | * \param[out] iB 456 interleaved soft output bits */ |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 136 | void gsm0503_mcs1_dl_interleave(const ubit_t *up, const ubit_t *hc, |
| 137 | const ubit_t *dc, ubit_t *iB) |
| 138 | { |
| 139 | int k; |
| 140 | ubit_t c[452]; |
| 141 | ubit_t cp[456]; |
| 142 | |
| 143 | for (k = 0; k < 12; k++) |
| 144 | c[k] = up[k]; |
| 145 | for (k = 12; k < 80; k++) |
| 146 | c[k] = hc[k - 12]; |
| 147 | for (k = 80; k < 452; k++) |
| 148 | c[k] = dc[k - 80]; |
| 149 | |
| 150 | for (k = 0; k < 25; k++) |
| 151 | cp[k] = c[k]; |
| 152 | for (k = 26; k < 82; k++) |
| 153 | cp[k] = c[k - 1]; |
| 154 | for (k = 83; k < 139; k++) |
| 155 | cp[k] = c[k - 2]; |
| 156 | for (k = 140; k < 424; k++) |
| 157 | cp[k] = c[k - 3]; |
| 158 | for (k = 425; k < 456; k++) |
| 159 | cp[k] = c[k - 4]; |
| 160 | |
| 161 | cp[25] = 0; |
| 162 | cp[82] = 0; |
| 163 | cp[139] = 0; |
| 164 | cp[424] = 0; |
| 165 | |
| 166 | gsm0503_xcch_interleave(cp, iB); |
| 167 | } |
| 168 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 169 | /*! \brief Interleave MCS1 UL burst bits according to TS 05.03 5.1.5.2.4 |
| 170 | * \param[out] hc caller-allocated output buffer for 80 soft coded header bits |
| 171 | * \param[out] dc caller-allocated output buffer for 372 soft coded data bits |
| 172 | * \param[in] iB 456 interleaved soft input bits */ |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 173 | void gsm0503_mcs1_ul_deinterleave(sbit_t *hc, sbit_t *dc, const sbit_t *iB) |
| 174 | { |
| 175 | int k; |
| 176 | sbit_t c[452]; |
| 177 | sbit_t cp[456]; |
| 178 | |
| 179 | gsm0503_xcch_deinterleave(cp, iB); |
| 180 | |
| 181 | for (k = 0; k < 25; k++) |
| 182 | c[k] = cp[k]; |
| 183 | for (k = 26; k < 82; k++) |
| 184 | c[k - 1] = cp[k]; |
| 185 | for (k = 83; k < 139; k++) |
| 186 | c[k - 2] = cp[k]; |
| 187 | for (k = 140; k < 424; k++) |
| 188 | c[k - 3] = cp[k]; |
| 189 | for (k = 425; k < 456; k++) |
| 190 | c[k - 4] = cp[k]; |
| 191 | |
| 192 | if (hc) { |
| 193 | for (k = 0; k < 80; k++) |
| 194 | hc[k] = c[k]; |
| 195 | } |
| 196 | |
| 197 | if (dc) { |
| 198 | for (k = 80; k < 452; k++) |
| 199 | dc[k - 80] = c[k]; |
| 200 | } |
| 201 | } |
| 202 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 203 | /*! \brief Interleave MCS1 DL burst bits according to TS 05.03 5.1.5.2.4 |
| 204 | * \param[in] hc 80 input coded bits (header) |
| 205 | * \param[in] dc 372 input bits (data) |
| 206 | * \param[out] iB 456 interleaved output bits */ |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 207 | void gsm0503_mcs1_ul_interleave(const ubit_t *hc, const ubit_t *dc, ubit_t *iB) |
| 208 | { |
| 209 | int k; |
| 210 | ubit_t c[452]; |
| 211 | ubit_t cp[456]; |
| 212 | |
| 213 | for (k = 0; k < 80; k++) |
| 214 | c[k] = hc[k]; |
| 215 | for (k = 80; k < 452; k++) |
| 216 | c[k] = dc[k - 80]; |
| 217 | |
| 218 | for (k = 0; k < 25; k++) |
| 219 | cp[k] = c[k]; |
| 220 | for (k = 26; k < 82; k++) |
| 221 | cp[k] = c[k - 1]; |
| 222 | for (k = 83; k < 139; k++) |
| 223 | cp[k] = c[k - 2]; |
| 224 | for (k = 140; k < 424; k++) |
| 225 | cp[k] = c[k - 3]; |
| 226 | for (k = 425; k < 456; k++) |
| 227 | cp[k] = c[k - 4]; |
| 228 | |
| 229 | cp[25] = 0; |
| 230 | cp[82] = 0; |
| 231 | cp[139] = 0; |
| 232 | cp[424] = 0; |
| 233 | |
| 234 | gsm0503_xcch_interleave(cp, iB); |
| 235 | } |
| 236 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 237 | /*! \brief Interleave MCS5 UL burst bits according to TS 05.03 5.1.9.2.4 |
| 238 | * \param[in] hc 136 soft coded header input bits |
| 239 | * \param[in] dc 1248 soft coded data input bits |
| 240 | * \param[out] hi 136 interleaved header output bits |
| 241 | * \param[out] di 1248 interleaved data output bits */ |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 242 | void gsm0503_mcs5_ul_interleave(const ubit_t *hc, const ubit_t *dc, |
| 243 | ubit_t *hi, ubit_t *di) |
| 244 | { |
| 245 | int j, k; |
| 246 | |
| 247 | /* Header */ |
| 248 | for (k = 0; k < 136; k++) { |
| 249 | j = 34 * (k % 4) + 2 * (11 * k % 17) + k % 8 / 4; |
| 250 | hi[j] = hc[k]; |
| 251 | } |
| 252 | |
| 253 | /* Data */ |
| 254 | for (k = 0; k < 1248; k++) { |
| 255 | j = gsm0503_interleave_mcs5[k]; |
| 256 | di[j] = dc[k]; |
| 257 | } |
| 258 | } |
| 259 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 260 | /*! \brief De-Interleave MCS5 UL burst bits according to TS 05.03 5.1.9.2.4 |
| 261 | * \param[out] hc caller-allocated output buffer for 136 soft coded header bits |
| 262 | * \param[out] dc caller-allocated output buffer for 1248 soft coded data bits |
| 263 | * \param[in] iB interleaved soft input bits */ |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 264 | void gsm0503_mcs5_ul_deinterleave(sbit_t *hc, sbit_t *dc, |
| 265 | const sbit_t *hi, const sbit_t *di) |
| 266 | { |
| 267 | int j, k; |
| 268 | |
| 269 | /* Header */ |
| 270 | if (hc) { |
| 271 | for (k = 0; k < 136; k++) { |
| 272 | j = 34 * (k % 4) + 2 * (11 * k % 17) + k % 8 / 4; |
| 273 | hc[k] = hi[j]; |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | /* Data */ |
| 278 | if (dc) { |
| 279 | for (k = 0; k < 1248; k++) { |
| 280 | j = gsm0503_interleave_mcs5[k]; |
| 281 | dc[k] = di[j]; |
| 282 | } |
| 283 | } |
| 284 | } |
| 285 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 286 | /*! \brief Interleave MCS5 DL burst bits according to TS 05.03 5.1.9.1.5 |
| 287 | * \param[in] hc 100 soft coded header input bits |
| 288 | * \param[in] dc 1248 soft coded data input bits |
| 289 | * \param[out] hi 100 interleaved header output bits |
| 290 | * \param[out] di 1248 interleaved data output bits */ |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 291 | void gsm0503_mcs5_dl_interleave(const ubit_t *hc, const ubit_t *dc, |
| 292 | ubit_t *hi, ubit_t *di) |
| 293 | { |
| 294 | int j, k; |
| 295 | |
| 296 | /* Header */ |
| 297 | for (k = 0; k < 100; k++) { |
| 298 | j = 25 * (k % 4) + ((17 * k) % 25); |
| 299 | hi[j] = hc[k]; |
| 300 | } |
| 301 | |
| 302 | /* Data */ |
| 303 | for (k = 0; k < 1248; k++) { |
| 304 | j = gsm0503_interleave_mcs5[k]; |
| 305 | di[j] = dc[k]; |
| 306 | } |
| 307 | } |
| 308 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 309 | /*! \brief De-Interleave MCS5 UL burst bits according to TS 05.03 5.1.9.1.5 |
| 310 | * \param[out] hc caller-allocated output buffer for 100 soft coded header bits |
| 311 | * \param[out] dc caller-allocated output buffer for 1248 soft coded data bits |
| 312 | * \param[in] iB interleaved soft input bits */ |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 313 | void gsm0503_mcs5_dl_deinterleave(sbit_t *hc, sbit_t *dc, |
| 314 | const sbit_t *hi, const sbit_t *di) |
| 315 | { |
| 316 | int j, k; |
| 317 | |
| 318 | /* Header */ |
| 319 | if (hc) { |
| 320 | for (k = 0; k < 100; k++) { |
| 321 | j = 25 * (k % 4) + ((17 * k) % 25); |
| 322 | hc[k] = hi[j]; |
| 323 | } |
| 324 | } |
| 325 | |
| 326 | /* Data */ |
| 327 | if (dc) { |
| 328 | for (k = 0; k < 1248; k++) { |
| 329 | j = gsm0503_interleave_mcs5[k]; |
| 330 | dc[k] = di[j]; |
| 331 | } |
| 332 | } |
| 333 | } |
| 334 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 335 | /*! \brief Interleave MCS7 DL burst bits according to TS 05.03 5.1.11.1.5 |
| 336 | * \param[in] hc 124 soft coded header input bits |
| 337 | * \param[in] c1 612 soft coded data input bits |
| 338 | * \param[in] c2 612 soft coded data input bits |
| 339 | * \param[out] hi 124 interleaved header output bits |
| 340 | * \param[out] di 1224 interleaved data output bits */ |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 341 | void gsm0503_mcs7_dl_interleave(const ubit_t *hc, const ubit_t *c1, |
| 342 | const ubit_t *c2, ubit_t *hi, ubit_t *di) |
| 343 | { |
| 344 | int j, k; |
| 345 | ubit_t dc[1224]; |
| 346 | |
| 347 | /* Header */ |
| 348 | for (k = 0; k < 124; k++) { |
| 349 | j = 31 * (k % 4) + ((17 * k) % 31); |
| 350 | hi[j] = hc[k]; |
| 351 | } |
| 352 | |
| 353 | memcpy(&dc[0], c1, 612); |
| 354 | memcpy(&dc[612], c2, 612); |
| 355 | |
| 356 | /* Data */ |
| 357 | for (k = 0; k < 1224; k++) { |
| 358 | j = 306 * (k % 4) + 3 * (44 * k % 102 + k / 4 % 2) + |
| 359 | (k + 2 - k / 408) % 3; |
| 360 | di[j] = dc[k]; |
| 361 | } |
| 362 | } |
| 363 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 364 | /*! \brief De-Interleave MCS7 DL burst bits according to TS 05.03 5.1.11.1.5 |
| 365 | * \param[out] hc caller-allocated output buffer for 124 soft coded header bits |
| 366 | * \param[out] c1 caller-allocated output buffer for 612 soft coded data bits |
| 367 | * \param[out] c2 caller-allocated output buffer for 612 soft coded data bits |
| 368 | * \param[in] hi interleaved soft input header bits |
| 369 | * \param[in] di interleaved soft input data bits */ |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 370 | void gsm0503_mcs7_dl_deinterleave(sbit_t *hc, sbit_t *c1, sbit_t *c2, |
| 371 | const sbit_t *hi, const sbit_t *di) |
| 372 | { |
| 373 | int j, k; |
| 374 | ubit_t dc[1224]; |
| 375 | |
| 376 | /* Header */ |
| 377 | if (hc) { |
| 378 | for (k = 0; k < 124; k++) { |
| 379 | j = 31 * (k % 4) + ((17 * k) % 31); |
| 380 | hc[k] = hi[j]; |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | /* Data */ |
| 385 | if (c1 && c2) { |
| 386 | for (k = 0; k < 1224; k++) { |
| 387 | j = 306 * (k % 4) + 3 * (44 * k % 102 + k / 4 % 2) + |
| 388 | (k + 2 - k / 408) % 3; |
| 389 | dc[k] = di[j]; |
| 390 | } |
| 391 | |
| 392 | memcpy(c1, &dc[0], 612); |
| 393 | memcpy(c2, &dc[612], 612); |
| 394 | } |
| 395 | } |
| 396 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 397 | /*! \brief Interleave MCS7 UL burst bits according to TS 05.03 5.1.11.2.4 |
| 398 | * \param[in] hc 124 soft coded header input bits |
| 399 | * \param[in] c1 612 soft coded data input bits |
| 400 | * \param[in] c2 612 soft coded data input bits |
| 401 | * \param[out] hi 124 interleaved header output bits |
| 402 | * \param[out] di 1224 interleaved data output bits */ |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 403 | void gsm0503_mcs7_ul_interleave(const ubit_t *hc, const ubit_t *c1, |
| 404 | const ubit_t *c2, ubit_t *hi, ubit_t *di) |
| 405 | { |
| 406 | int j, k; |
| 407 | ubit_t dc[1224]; |
| 408 | |
| 409 | /* Header */ |
| 410 | for (k = 0; k < 160; k++) { |
| 411 | j = 40 * (k % 4) + 2 * (13 * (k / 8) % 20) + k % 8 / 4; |
| 412 | hi[j] = hc[k]; |
| 413 | } |
| 414 | |
| 415 | memcpy(&dc[0], c1, 612); |
| 416 | memcpy(&dc[612], c2, 612); |
| 417 | |
| 418 | /* Data */ |
| 419 | for (k = 0; k < 1224; k++) { |
| 420 | j = 306 * (k % 4) + 3 * (44 * k % 102 + k / 4 % 2) + |
| 421 | (k + 2 - k / 408) % 3; |
| 422 | di[j] = dc[k]; |
| 423 | } |
| 424 | } |
| 425 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 426 | /*! \brief De-Interleave MCS7 UL burst bits according to TS 05.03 5.1.11.2.4 |
| 427 | * \param[out] hc caller-allocated output buffer for 160 soft coded header bits |
| 428 | * \param[out] c1 caller-allocated output buffer for 612 soft coded data bits |
| 429 | * \param[out] c2 caller-allocated output buffer for 612 soft coded data bits |
| 430 | * \param[in] hi interleaved soft input header bits |
| 431 | * \param[in] di interleaved soft input data bits */ |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 432 | void gsm0503_mcs7_ul_deinterleave(sbit_t *hc, sbit_t *c1, sbit_t *c2, |
| 433 | const sbit_t *hi, const sbit_t *di) |
| 434 | { |
| 435 | int j, k; |
| 436 | ubit_t dc[1224]; |
| 437 | |
| 438 | /* Header */ |
| 439 | if (hc) { |
| 440 | for (k = 0; k < 160; k++) { |
| 441 | j = 40 * (k % 4) + 2 * (13 * (k / 8) % 20) + k % 8 / 4; |
| 442 | hc[k] = hi[j]; |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | /* Data */ |
| 447 | if (c1 && c2) { |
| 448 | for (k = 0; k < 1224; k++) { |
| 449 | j = 306 * (k % 4) + 3 * (44 * k % 102 + k / 4 % 2) + |
| 450 | (k + 2 - k / 408) % 3; |
| 451 | dc[k] = di[j]; |
| 452 | } |
| 453 | |
| 454 | memcpy(c1, &dc[0], 612); |
| 455 | memcpy(c2, &dc[612], 612); |
| 456 | } |
| 457 | } |
| 458 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 459 | /*! \brief Interleave MCS8 UL burst bits according to TS 05.03 5.1.12.2.4 |
| 460 | * \param[in] hc 160 soft coded header input bits |
| 461 | * \param[in] c1 612 soft coded data input bits |
| 462 | * \param[in] c2 612 soft coded data input bits |
| 463 | * \param[out] hi 160 interleaved header output bits |
| 464 | * \param[out] di 1224 interleaved data output bits */ |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 465 | void gsm0503_mcs8_ul_interleave(const ubit_t *hc, const ubit_t *c1, |
| 466 | const ubit_t *c2, ubit_t *hi, ubit_t *di) |
| 467 | { |
| 468 | int j, k; |
| 469 | ubit_t dc[1224]; |
| 470 | |
| 471 | /* Header */ |
| 472 | for (k = 0; k < 160; k++) { |
| 473 | j = 40 * (k % 4) + 2 * (13 * (k / 8) % 20) + k % 8 / 4; |
| 474 | hi[j] = hc[k]; |
| 475 | } |
| 476 | |
| 477 | memcpy(&dc[0], c1, 612); |
| 478 | memcpy(&dc[612], c2, 612); |
| 479 | |
| 480 | /* Data */ |
| 481 | for (k = 0; k < 1224; k++) { |
| 482 | j = 306 * (2 * (k / 612) + (k % 2)) + |
| 483 | 3 * (74 * k % 102 + k / 2 % 2) + (k + 2 - k / 204) % 3; |
| 484 | di[j] = dc[k]; |
| 485 | } |
| 486 | } |
| 487 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 488 | |
| 489 | /*! \brief De-Interleave MCS8 UL burst bits according to TS 05.03 5.1.12.2.4 |
| 490 | * \param[out] hc caller-allocated output buffer for 160 soft coded header bits |
| 491 | * \param[out] c1 caller-allocated output buffer for 612 soft coded data bits |
| 492 | * \param[out] c2 caller-allocated output buffer for 612 soft coded data bits |
| 493 | * \param[in] hi interleaved soft input header bits |
| 494 | * \param[in] di interleaved soft input data bits */ |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 495 | void gsm0503_mcs8_ul_deinterleave(sbit_t *hc, sbit_t *c1, sbit_t *c2, |
| 496 | const sbit_t *hi, const sbit_t *di) |
| 497 | { |
| 498 | int j, k; |
| 499 | ubit_t dc[1224]; |
| 500 | |
| 501 | /* Header */ |
| 502 | if (hc) { |
| 503 | for (k = 0; k < 160; k++) { |
| 504 | j = 40 * (k % 4) + 2 * (13 * (k / 8) % 20) + k % 8 / 4; |
| 505 | hc[k] = hi[j]; |
| 506 | } |
| 507 | } |
| 508 | |
| 509 | /* Data */ |
| 510 | if (c1 && c2) { |
| 511 | for (k = 0; k < 1224; k++) { |
| 512 | j = 306 * (2 * (k / 612) + (k % 2)) + |
| 513 | 3 * (74 * k % 102 + k / 2 % 2) + (k + 2 - k / 204) % 3; |
| 514 | dc[k] = di[j]; |
| 515 | } |
| 516 | |
| 517 | memcpy(c1, &dc[0], 612); |
| 518 | memcpy(c2, &dc[612], 612); |
| 519 | } |
| 520 | } |
| 521 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 522 | /*! \brief Interleave MCS8 DL burst bits according to TS 05.03 5.1.12.1.5 |
| 523 | * \param[in] hc 124 soft coded header input bits |
| 524 | * \param[in] c1 612 soft coded data input bits |
| 525 | * \param[in] c2 612 soft coded data input bits |
| 526 | * \param[out] hi 124 interleaved header output bits |
| 527 | * \param[out] di 1224 interleaved data output bits */ |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 528 | void gsm0503_mcs8_dl_interleave(const ubit_t *hc, const ubit_t *c1, |
| 529 | const ubit_t *c2, ubit_t *hi, ubit_t *di) |
| 530 | { |
| 531 | int j, k; |
| 532 | ubit_t dc[1224]; |
| 533 | |
| 534 | /* Header */ |
| 535 | for (k = 0; k < 124; k++) { |
| 536 | j = 31 * (k % 4) + ((17 * k) % 31); |
| 537 | hi[j] = hc[k]; |
| 538 | } |
| 539 | |
| 540 | memcpy(&dc[0], c1, 612); |
| 541 | memcpy(&dc[612], c2, 612); |
| 542 | |
| 543 | /* Data */ |
| 544 | for (k = 0; k < 1224; k++) { |
| 545 | j = 306 * (2 * (k / 612) + (k % 2)) + |
| 546 | 3 * (74 * k % 102 + k / 2 % 2) + (k + 2 - k / 204) % 3; |
| 547 | di[j] = dc[k]; |
| 548 | } |
| 549 | } |
| 550 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 551 | /*! \brief De-Interleave MCS8 DL burst bits according to TS 05.03 5.1.12.1.5 |
| 552 | * \param[out] hc caller-allocated output buffer for 124 soft coded header bits |
| 553 | * \param[out] c1 caller-allocated output buffer for 612 soft coded data bits |
| 554 | * \param[out] c2 caller-allocated output buffer for 612 soft coded data bits |
| 555 | * \param[in] hi interleaved soft input header bits |
| 556 | * \param[in] di interleaved soft input data bits */ |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 557 | void gsm0503_mcs8_dl_deinterleave(sbit_t *hc, sbit_t *c1, sbit_t *c2, |
| 558 | const sbit_t *hi, const sbit_t *di) |
| 559 | { |
| 560 | int j, k; |
| 561 | ubit_t dc[1224]; |
| 562 | |
| 563 | /* Header */ |
| 564 | if (hc) { |
| 565 | for (k = 0; k < 124; k++) { |
| 566 | j = 31 * (k % 4) + ((17 * k) % 31); |
| 567 | hc[k] = hi[j]; |
| 568 | } |
| 569 | } |
| 570 | |
| 571 | /* Data */ |
| 572 | if (c1 && c2) { |
| 573 | for (k = 0; k < 1224; k++) { |
| 574 | j = 306 * (2 * (k / 612) + (k % 2)) + |
| 575 | 3 * (74 * k % 102 + k / 2 % 2) + (k + 2 - k / 204) % 3; |
| 576 | dc[k] = di[j]; |
| 577 | } |
| 578 | |
| 579 | memcpy(c1, &dc[0], 612); |
| 580 | memcpy(c2, &dc[612], 612); |
| 581 | } |
| 582 | } |
| 583 | |
| 584 | /* |
| 585 | * GSM TCH FR/EFR/AFS interleaving and burst mapping |
| 586 | * |
| 587 | * Interleaving: |
| 588 | * |
| 589 | * Given 456 coded input bits, form 8 blocks of 114 bits, |
| 590 | * where even bits of the first 4 blocks and odd bits of the last 4 blocks |
| 591 | * are used: |
| 592 | * |
| 593 | * i(B, j) = c(n, k) k = 0, ..., 455 |
| 594 | * n = 0, ..., N, N + 1, ... |
| 595 | * B = B_0 + 4n + (k mod 8) |
| 596 | * j = 2(49k mod 57) + ((k mod 8) div 4) |
| 597 | * |
| 598 | * Mapping on Burst: |
| 599 | * |
| 600 | * e(B, j) = i(B, j) |
| 601 | * e(B, 59 + j) = i(B, 57 + j) j = 0, ..., 56 |
| 602 | * e(B, 57) = h_l(B) |
| 603 | * e(B, 58) = h_n(B) |
| 604 | * |
| 605 | * Where hl(B) and hn(B) are bits in burst B indicating flags. |
| 606 | */ |
| 607 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 608 | /*! \brief GSM TCH FR/EFR/AFS De-Interleaving and burst mapping |
| 609 | * \param[out] cB caller-allocated buffer for 456 unpacked output bits |
| 610 | * \param[in] iB 456 unpacked interleaved input bits */ |
Harald Welte | 0eb2c5d | 2017-06-12 15:03:11 +0200 | [diff] [blame] | 611 | void gsm0503_tch_fr_deinterleave(sbit_t *cB, const sbit_t *iB) |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 612 | { |
| 613 | int j, k, B; |
| 614 | |
| 615 | for (k = 0; k < 456; k++) { |
| 616 | B = k & 7; |
| 617 | j = 2 * ((49 * k) % 57) + ((k & 7) >> 2); |
| 618 | cB[k] = iB[B * 114 + j]; |
| 619 | } |
| 620 | } |
| 621 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 622 | /*! \brief GSM TCH FR/EFR/AFS Interleaving and burst mapping |
| 623 | * \param[in] cB caller-allocated buffer for 456 unpacked input bits |
| 624 | * \param[out] iB 456 unpacked interleaved output bits */ |
Harald Welte | 0eb2c5d | 2017-06-12 15:03:11 +0200 | [diff] [blame] | 625 | void gsm0503_tch_fr_interleave(const ubit_t *cB, ubit_t *iB) |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 626 | { |
| 627 | int j, k, B; |
| 628 | |
| 629 | for (k = 0; k < 456; k++) { |
| 630 | B = k & 7; |
| 631 | j = 2 * ((49 * k) % 57) + ((k & 7) >> 2); |
| 632 | iB[B * 114 + j] = cB[k]; |
| 633 | } |
| 634 | } |
| 635 | |
| 636 | /* |
| 637 | * GSM TCH HR/AHS interleaving and burst mapping |
| 638 | * |
| 639 | * Interleaving: |
| 640 | * |
| 641 | * Given 288 coded input bits, form 4 blocks of 114 bits, |
| 642 | * where even bits of the first 2 blocks and odd bits of the last 2 blocks |
| 643 | * are used: |
| 644 | * |
| 645 | * i(B, j) = c(n, k) k = 0, ..., 227 |
| 646 | * n = 0, ..., N, N + 1, ... |
| 647 | * B = B_0 + 2n + b |
| 648 | * j, b = table[k]; |
| 649 | * |
| 650 | * Mapping on Burst: |
| 651 | * |
| 652 | * e(B, j) = i(B, j) |
| 653 | * e(B, 59 + j) = i(B, 57 + j) j = 0, ..., 56 |
| 654 | * e(B, 57) = h_l(B) |
| 655 | * e(B, 58) = h_n(B) |
| 656 | * |
| 657 | * Where hl(B) and hn(B) are bits in burst B indicating flags. |
| 658 | */ |
| 659 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 660 | /*! \brief GSM TCH HR/AHS De-Interleaving and burst mapping |
| 661 | * \param[out] cB caller-allocated buffer for 228 unpacked output bits |
| 662 | * \param[in] iB 228 unpacked interleaved input bits */ |
Harald Welte | 0eb2c5d | 2017-06-12 15:03:11 +0200 | [diff] [blame] | 663 | void gsm0503_tch_hr_deinterleave(sbit_t *cB, const sbit_t *iB) |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 664 | { |
| 665 | int j, k, B; |
| 666 | |
| 667 | for (k = 0; k < 228; k++) { |
| 668 | B = gsm0503_tch_hr_interleaving[k][1]; |
| 669 | j = gsm0503_tch_hr_interleaving[k][0]; |
| 670 | cB[k] = iB[B * 114 + j]; |
| 671 | } |
| 672 | } |
| 673 | |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 674 | /*! \brief GSM TCH HR/AHS Interleaving and burst mapping |
| 675 | * \param[in] cB caller-allocated buffer for 228 unpacked input bits |
| 676 | * \param[out] iB 228 unpacked interleaved output bits */ |
Harald Welte | 0eb2c5d | 2017-06-12 15:03:11 +0200 | [diff] [blame] | 677 | void gsm0503_tch_hr_interleave(const ubit_t *cB, ubit_t *iB) |
Vadim Yanitskiy | 3262f82 | 2016-09-23 01:48:59 +0700 | [diff] [blame] | 678 | { |
| 679 | int j, k, B; |
| 680 | |
| 681 | for (k = 0; k < 228; k++) { |
| 682 | B = gsm0503_tch_hr_interleaving[k][1]; |
| 683 | j = gsm0503_tch_hr_interleaving[k][0]; |
| 684 | iB[B * 114 + j] = cB[k]; |
| 685 | } |
| 686 | } |
Harald Welte | c663678 | 2017-06-12 14:59:37 +0200 | [diff] [blame] | 687 | |
| 688 | /*! @} */ |