mirror of https://github.com/pvnis/srsRAN_4G.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
99 lines
3.8 KiB
C
99 lines
3.8 KiB
C
/**
|
|
*
|
|
* \section COPYRIGHT
|
|
*
|
|
* Copyright 2013-2015 Software Radio Systems Limited
|
|
*
|
|
* \section LICENSE
|
|
*
|
|
* This file is part of the srsLTE library.
|
|
*
|
|
* srsLTE is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as
|
|
* published by the Free Software Foundation, either version 3 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* srsLTE is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* A copy of the GNU Affero General Public License can be found in
|
|
* the LICENSE file in the top-level directory of this distribution
|
|
* and at http://www.gnu.org/licenses/.
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
|
|
#include "srslte/common/phy_common.h"
|
|
#include "srslte/fec/tc_interl.h"
|
|
#include "srslte/fec/turbocoder.h"
|
|
#include "srslte/fec/cbsegm.h"
|
|
#include "srslte/utils/debug.h"
|
|
|
|
/************************************************
|
|
*
|
|
* LTE TURBO CODE INTERLEAVER
|
|
*
|
|
************************************************/
|
|
|
|
const uint32_t f1_list[SRSLTE_NOF_TC_CB_SIZES] = { 3, 7, 19, 7, 7, 11, 5, 11, 7, 41, 103,
|
|
15, 9, 17, 9, 21, 101, 21, 57, 23, 13, 27, 11, 27, 85, 29, 33, 15, 17, 33,
|
|
103, 19, 19, 37, 19, 21, 21, 115, 193, 21, 133, 81, 45, 23, 243, 151, 155,
|
|
25, 51, 47, 91, 29, 29, 247, 29, 89, 91, 157, 55, 31, 17, 35, 227, 65, 19,
|
|
37, 41, 39, 185, 43, 21, 155, 79, 139, 23, 217, 25, 17, 127, 25, 239, 17,
|
|
137, 215, 29, 15, 147, 29, 59, 65, 55, 31, 17, 171, 67, 35, 19, 39, 19, 199,
|
|
21, 211, 21, 43, 149, 45, 49, 71, 13, 17, 25, 183, 55, 127, 27, 29, 29, 57,
|
|
45, 31, 59, 185, 113, 31, 17, 171, 209, 253, 367, 265, 181, 39, 27, 127,
|
|
143, 43, 29, 45, 157, 47, 13, 111, 443, 51, 51, 451, 257, 57, 313, 271, 179,
|
|
331, 363, 375, 127, 31, 33, 43, 33, 477, 35, 233, 357, 337, 37, 71, 71, 37,
|
|
39, 127, 39, 39, 31, 113, 41, 251, 43, 21, 43, 45, 45, 161, 89, 323, 47, 23,
|
|
47, 263 };
|
|
|
|
const uint32_t f2_list[SRSLTE_NOF_TC_CB_SIZES] = { 10, 12, 42, 16, 18, 20, 22, 24, 26, 84,
|
|
90, 32, 34, 108, 38, 120, 84, 44, 46, 48, 50, 52, 36, 56, 58, 60, 62, 32,
|
|
198, 68, 210, 36, 74, 76, 78, 120, 82, 84, 86, 44, 90, 46, 94, 48, 98, 40,
|
|
102, 52, 106, 72, 110, 168, 114, 58, 118, 180, 122, 62, 84, 64, 66, 68, 420,
|
|
96, 74, 76, 234, 80, 82, 252, 86, 44, 120, 92, 94, 48, 98, 80, 102, 52, 106,
|
|
48, 110, 112, 114, 58, 118, 60, 122, 124, 84, 64, 66, 204, 140, 72, 74, 76,
|
|
78, 240, 82, 252, 86, 88, 60, 92, 846, 48, 28, 80, 102, 104, 954, 96, 110,
|
|
112, 114, 116, 354, 120, 610, 124, 420, 64, 66, 136, 420, 216, 444, 456,
|
|
468, 80, 164, 504, 172, 88, 300, 92, 188, 96, 28, 240, 204, 104, 212, 192,
|
|
220, 336, 228, 232, 236, 120, 244, 248, 168, 64, 130, 264, 134, 408, 138,
|
|
280, 142, 480, 146, 444, 120, 152, 462, 234, 158, 80, 96, 902, 166, 336,
|
|
170, 86, 174, 176, 178, 120, 182, 184, 186, 94, 190, 480 };
|
|
|
|
int srslte_tc_interl_LTE_gen(srslte_tc_interl_t *h, uint32_t long_cb) {
|
|
uint32_t cb_table_idx, f1, f2;
|
|
uint64_t i, j;
|
|
|
|
if (long_cb > h->max_long_cb) {
|
|
fprintf(stderr, "Interleaver initiated for max_long_cb=%d\n",
|
|
h->max_long_cb);
|
|
return -1;
|
|
}
|
|
|
|
cb_table_idx = srslte_cbsegm_cbindex(long_cb);
|
|
if (cb_table_idx == -1) {
|
|
fprintf(stderr, "Can't find long_cb=%d in valid TC CB table\n", long_cb);
|
|
return -1;
|
|
}
|
|
|
|
f1 = f1_list[cb_table_idx];
|
|
f2 = f2_list[cb_table_idx];
|
|
|
|
h->forward[0] = 0;
|
|
h->reverse[0] = 0;
|
|
for (i = 1; i < long_cb; i++) {
|
|
j = (f1 * i + f2 * i * i) % (long_cb);
|
|
h->forward[i] = (uint32_t) j;
|
|
h->reverse[j] = (uint32_t) i;
|
|
}
|
|
return 0;
|
|
|
|
}
|
|
|