5g-team
/
srsRAN_4G
mirror of https://github.com/pvnis/srsRAN_4G.git
2
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Moved prime number to different file

Browse Source
master
Xavier Arteaga 4 years ago committed by Xavier Arteaga
parent ae3c5ec7d0
commit a7ca8ffff7
5 changed files with 152 additions and 89 deletions
Show Stats Download Patch File Download Diff File

107
lib/include/srslte/phy/ch_estimation/ul_rs_tables.h
Unescape Escape View File

@ -16,67 +16,54 @@
#include <stdint.h> #include <stdint.h>
// Phi values for M_sc=12 Table 5.5.1.2-1 in 36.211 // Phi values for M_sc=12 Table 5.5.1.2-1 in 36.211
static const int phi_M_sc_12[30][12] = {{-1, 1, 3, -3, 3, 3, 1, 1, 3, 1, -3, 3}, {1, 1, 3, 3, 3, -1, 1, -3, -3, 1, -3, 3}, static const int phi_M_sc_12[30][12] = {
{1, 1, -3, -3, -3, -1, -3, -3, 1, -3, 1, -1}, {-1, 1, 1, 1, 1, -1, -3, -3, 1, -3, 3, -1}, {-1, 1, 3, -3, 3, 3, 1, 1, 3, 1, -3, 3}, {1, 1, 3, 3, 3, -1, 1, -3, -3, 1, -3, 3},
{-1, 3, 1, -1, 1, -1, -3, -1, 1, -1, 1, 3}, {1, -3, 3, -1, -1, 1, 1, -1, -1, 3, -3, 1}, {1, 1, -3, -3, -3, -1, -3, -3, 1, -3, 1, -1}, {-1, 1, 1, 1, 1, -1, -3, -3, 1, -3, 3, -1},
{-1, 3, -3, -3, -3, 3, 1, -1, 3, 3, -3, 1}, {-3, -1, -1, -1, 1, -3, 3, -1, 1, -3, 3, 1}, {-1, 3, 1, -1, 1, -1, -3, -1, 1, -1, 1, 3}, {1, -3, 3, -1, -1, 1, 1, -1, -1, 3, -3, 1},
{1, -3, 3, 1, -1, -1, -1, 1, 1, 3, -1, 1}, {1, -3, -1, 3, 3, -1, -3, 1, 1, 1, 1, 1}, {-1, 3, -3, -3, -3, 3, 1, -1, 3, 3, -3, 1}, {-3, -1, -1, -1, 1, -3, 3, -1, 1, -3, 3, 1},
{-1, 3, -1, 1, 1, -3, -3, -1, -3, -3, 3, -1}, {3, 1, -1, -1, 3, 3, -3, 1, 3, 1, 3, 3}, {1, -3, 3, 1, -1, -1, -1, 1, 1, 3, -1, 1}, {1, -3, -1, 3, 3, -1, -3, 1, 1, 1, 1, 1},
{1, -3, 1, 1, -3, 1, 1, 1, -3, -3, -3, 1}, {3, 3, -3, 3, -3, 1, 1, 3, -1, -3, 3, 3}, {-1, 3, -1, 1, 1, -3, -3, -1, -3, -3, 3, -1}, {3, 1, -1, -1, 3, 3, -3, 1, 3, 1, 3, 3},
{-3, 1, -1, -3, -1, 3, 1, 3, 3, 3, -1, 1}, {3, -1, 1, -3, -1, -1, 1, 1, 3, 1, -1, -3}, {1, -3, 1, 1, -3, 1, 1, 1, -3, -3, -3, 1}, {3, 3, -3, 3, -3, 1, 1, 3, -1, -3, 3, 3},
{1, 3, 1, -1, 1, 3, 3, 3, -1, -1, 3, -1}, {-3, 1, 1, 3, -3, 3, -3, -3, 3, 1, 3, -1}, {-3, 1, -1, -3, -1, 3, 1, 3, 3, 3, -1, 1}, {3, -1, 1, -3, -1, -1, 1, 1, 3, 1, -1, -3},
{-3, 3, 1, 1, -3, 1, -3, -3, -1, -1, 1, -3}, {-1, 3, 1, 3, 1, -1, -1, 3, -3, -1, -3, -1}, {1, 3, 1, -1, 1, 3, 3, 3, -1, -1, 3, -1}, {-3, 1, 1, 3, -3, 3, -3, -3, 3, 1, 3, -1},
{-1, -3, 1, 1, 1, 1, 3, 1, -1, 1, -3, -1}, {-1, 3, -1, 1, -3, -3, -3, -3, -3, 1, -1, -3}, {-3, 3, 1, 1, -3, 1, -3, -3, -1, -1, 1, -3}, {-1, 3, 1, 3, 1, -1, -1, 3, -3, -1, -3, -1},
{1, 1, -3, -3, -3, -3, -1, 3, -3, 1, -3, 3}, {1, 1, -1, -3, -1, -3, 1, -1, 1, 3, -1, 1}, {-1, -3, 1, 1, 1, 1, 3, 1, -1, 1, -3, -1}, {-1, 3, -1, 1, -3, -3, -3, -3, -3, 1, -1, -3},
{1, 1, 3, 1, 3, 3, -1, 1, -1, -3, -3, 1}, {1, -3, 3, 3, 1, 3, 3, 1, -3, -1, -1, 3}, {1, 1, -3, -3, -3, -3, -1, 3, -3, 1, -3, 3}, {1, 1, -1, -3, -1, -3, 1, -1, 1, 3, -1, 1},
{1, 3, -3, -3, 3, -3, 1, -1, -1, 3, -1, -3}, {-3, -1, -3, -1, -3, 3, 1, -1, 1, 3, -3, -3}, {1, 1, 3, 1, 3, 3, -1, 1, -1, -3, -3, 1}, {1, -3, 3, 3, 1, 3, 3, 1, -3, -1, -1, 3},
{-1, 3, -3, 3, -1, 3, 3, -3, 3, 3, -1, -1}, {3, -3, -3, -1, -1, -3, -1, 3, -3, 3, 1, -1}}; {1, 3, -3, -3, 3, -3, 1, -1, -1, 3, -1, -3}, {-3, -1, -3, -1, -3, 3, 1, -1, 1, 3, -3, -3},
{-1, 3, -3, 3, -1, 3, 3, -3, 3, 3, -1, -1}, {3, -3, -3, -1, -1, -3, -1, 3, -3, 3, 1, -1}};
// Phi values for M_sc=24 Table 5.5.1.2-2 in 36.211 // Phi values for M_sc=24 Table 5.5.1.2-2 in 36.211
static const int phi_M_sc_24[30][24] = {{-1, 3, 1, -3, 3, -1, 1, 3, -3, 3, 1, 3, -3, 3, 1, 1, -1, 1, 3, -3, 3, -3, -1, -3}, static const int phi_M_sc_24[30][24] = {
{-3, 3, -3, -3, -3, 1, -3, -3, 3, -1, 1, 1, 1, 3, 1, -1, 3, -3, -3, 1, 3, 1, 1, -3}, {-1, 3, 1, -3, 3, -1, 1, 3, -3, 3, 1, 3, -3, 3, 1, 1, -1, 1, 3, -3, 3, -3, -1, -3},
{3, -1, 3, 3, 1, 1, -3, 3, 3, 3, 3, 1, -1, 3, -1, 1, 1, -1, -3, -1, -1, 1, 3, 3}, {-3, 3, -3, -3, -3, 1, -3, -3, 3, -1, 1, 1, 1, 3, 1, -1, 3, -3, -3, 1, 3, 1, 1, -3},
{-1, -3, 1, 1, 3, -3, 1, 1, -3, -1, -1, 1, 3, 1, 3, 1, -1, 3, 1, 1, -3, -1, -3, -1}, {3, -1, 3, 3, 1, 1, -3, 3, 3, 3, 3, 1, -1, 3, -1, 1, 1, -1, -3, -1, -1, 1, 3, 3},
{-1, -1, -1, -3, -3, -1, 1, 1, 3, 3, -1, 3, -1, 1, -1, -3, 1, -1, -3, -3, 1, -3, -1, -1}, {-1, -3, 1, 1, 3, -3, 1, 1, -3, -1, -1, 1, 3, 1, 3, 1, -1, 3, 1, 1, -3, -1, -3, -1},
{-3, 1, 1, 3, -1, 1, 3, 1, -3, 1, -3, 1, 1, -1, -1, 3, -1, -3, 3, -3, -3, -3, 1, 1}, {-1, -1, -1, -3, -3, -1, 1, 1, 3, 3, -1, 3, -1, 1, -1, -3, 1, -1, -3, -3, 1, -3, -1, -1},
{1, 1, -1, -1, 3, -3, -3, 3, -3, 1, -1, -1, 1, -1, 1, 1, -1, -3, -1, 1, -1, 3, -1, -3}, {-3, 1, 1, 3, -1, 1, 3, 1, -3, 1, -3, 1, 1, -1, -1, 3, -1, -3, 3, -3, -3, -3, 1, 1},
{-3, 3, 3, -1, -1, -3, -1, 3, 1, 3, 1, 3, 1, 1, -1, 3, 1, -1, 1, 3, -3, -1, -1, 1}, {1, 1, -1, -1, 3, -3, -3, 3, -3, 1, -1, -1, 1, -1, 1, 1, -1, -3, -1, 1, -1, 3, -1, -3},
{-3, 1, 3, -3, 1, -1, -3, 3, -3, 3, -1, -1, -1, -1, 1, -3, -3, -3, 1, -3, -3, -3, 1, -3}, {-3, 3, 3, -1, -1, -3, -1, 3, 1, 3, 1, 3, 1, 1, -1, 3, 1, -1, 1, 3, -3, -1, -1, 1},
{1, 1, -3, 3, 3, -1, -3, -1, 3, -3, 3, 3, 3, -1, 1, 1, -3, 1, -1, 1, 1, -3, 1, 1}, {-3, 1, 3, -3, 1, -1, -3, 3, -3, 3, -1, -1, -1, -1, 1, -3, -3, -3, 1, -3, -3, -3, 1, -3},
{-1, 1, -3, -3, 3, -1, 3, -1, -1, -3, -3, -3, -1, -3, -3, 1, -1, 1, 3, 3, -1, 1, -1, 3}, {1, 1, -3, 3, 3, -1, -3, -1, 3, -3, 3, 3, 3, -1, 1, 1, -3, 1, -1, 1, 1, -3, 1, 1},
{1, 3, 3, -3, -3, 1, 3, 1, -1, -3, -3, -3, 3, 3, -3, 3, 3, -1, -3, 3, -1, 1, -3, 1}, {-1, 1, -3, -3, 3, -1, 3, -1, -1, -3, -3, -3, -1, -3, -3, 1, -1, 1, 3, 3, -1, 1, -1, 3},
{1, 3, 3, 1, 1, 1, -1, -1, 1, -3, 3, -1, 1, 1, -3, 3, 3, -1, -3, 3, -3, -1, -3, -1}, {1, 3, 3, -3, -3, 1, 3, 1, -1, -3, -3, -3, 3, 3, -3, 3, 3, -1, -3, 3, -1, 1, -3, 1},
{3, -1, -1, -1, -1, -3, -1, 3, 3, 1, -1, 1, 3, 3, 3, -1, 1, 1, -3, 1, 3, -1, -3, 3}, {1, 3, 3, 1, 1, 1, -1, -1, 1, -3, 3, -1, 1, 1, -3, 3, 3, -1, -3, 3, -3, -1, -3, -1},
{-3, -3, 3, 1, 3, 1, -3, 3, 1, 3, 1, 1, 3, 3, -1, -1, -3, 1, -3, -1, 3, 1, 1, 3}, {3, -1, -1, -1, -1, -3, -1, 3, 3, 1, -1, 1, 3, 3, 3, -1, 1, 1, -3, 1, 3, -1, -3, 3},
{-1, -1, 1, -3, 1, 3, -3, 1, -1, -3, -1, 3, 1, 3, 1, -1, -3, -3, -1, -1, -3, -3, -3, -1}, {-3, -3, 3, 1, 3, 1, -3, 3, 1, 3, 1, 1, 3, 3, -1, -1, -3, 1, -3, -1, 3, 1, 1, 3},
{-1, -3, 3, -1, -1, -1, -1, 1, 1, -3, 3, 1, 3, 3, 1, -1, 1, -3, 1, -3, 1, 1, -3, -1}, {-1, -1, 1, -3, 1, 3, -3, 1, -1, -3, -1, 3, 1, 3, 1, -1, -3, -3, -1, -1, -3, -3, -3, -1},
{1, 3, -1, 3, 3, -1, -3, 1, -1, -3, 3, 3, 3, -1, 1, 1, 3, -1, -3, -1, 3, -1, -1, -1}, {-1, -3, 3, -1, -1, -1, -1, 1, 1, -3, 3, 1, 3, 3, 1, -1, 1, -3, 1, -3, 1, 1, -3, -1},
{1, 1, 1, 1, 1, -1, 3, -1, -3, 1, 1, 3, -3, 1, -3, -1, 1, 1, -3, -3, 3, 1, 1, -3}, {1, 3, -1, 3, 3, -1, -3, 1, -1, -3, 3, 3, 3, -1, 1, 1, 3, -1, -3, -1, 3, -1, -1, -1},
{1, 3, 3, 1, -1, -3, 3, -1, 3, 3, 3, -3, 1, -1, 1, -1, -3, -1, 1, 3, -1, 3, -3, -3}, {1, 1, 1, 1, 1, -1, 3, -1, -3, 1, 1, 3, -3, 1, -3, -1, 1, 1, -3, -3, 3, 1, 1, -3},
{-1, -3, 3, -3, -3, -3, -1, -1, -3, -1, -3, 3, 1, 3, -3, -1, 3, -1, 1, -1, 3, -3, 1, -1}, {1, 3, 3, 1, -1, -3, 3, -1, 3, 3, 3, -3, 1, -1, 1, -1, -3, -1, 1, 3, -1, 3, -3, -3},
{-3, -3, 1, 1, -1, 1, -1, 1, -1, 3, 1, -3, -1, 1, -1, 1, -1, -1, 3, 3, -3, -1, 1, -3}, {-1, -3, 3, -3, -3, -3, -1, -1, -3, -1, -3, 3, 1, 3, -3, -1, 3, -1, 1, -1, 3, -3, 1, -1},
{-3, -1, -3, 3, 1, -1, -3, -1, -3, -3, 3, -3, 3, -3, -1, 1, 3, 1, -3, 1, 3, 3, -1, -3}, {-3, -3, 1, 1, -1, 1, -1, 1, -1, 3, 1, -3, -1, 1, -1, 1, -1, -1, 3, 3, -3, -1, 1, -3},
{-1, -1, -1, -1, 3, 3, 3, 1, 3, 3, -3, 1, 3, -1, 3, -1, 3, 3, -3, 3, 1, -1, 3, 3}, {-3, -1, -3, 3, 1, -1, -3, -1, -3, -3, 3, -3, 3, -3, -1, 1, 3, 1, -3, 1, 3, 3, -1, -3},
{1, -1, 3, 3, -1, -3, 3, -3, -1, -1, 3, -1, 3, -1, -1, 1, 1, 1, 1, -1, -1, -3, -1, 3}, {-1, -1, -1, -1, 3, 3, 3, 1, 3, 3, -3, 1, 3, -1, 3, -1, 3, 3, -3, 3, 1, -1, 3, 3},
{1, -1, 1, -1, 3, -1, 3, 1, 1, -1, -1, -3, 1, 1, -3, 1, 3, -3, 1, 1, -3, -3, -1, -1}, {1, -1, 3, 3, -1, -3, 3, -3, -1, -1, 3, -1, 3, -1, -1, 1, 1, 1, 1, -1, -1, -3, -1, 3},
{-3, -1, 1, 3, 1, 1, -3, -1, -1, -3, 3, -3, 3, 1, -3, 3, -3, 1, -1, 1, -3, 1, 1, 1}, {1, -1, 1, -1, 3, -1, 3, 1, 1, -1, -1, -3, 1, 1, -3, 1, 3, -3, 1, 1, -3, -3, -1, -1},
{-1, -3, 3, 3, 1, 1, 3, -1, -3, -1, -1, -1, 3, 1, -3, -3, -1, 3, -3, -1, -3, -1, -3, -1}, {-3, -1, 1, 3, 1, 1, -3, -1, -1, -3, 3, -3, 3, 1, -3, 3, -3, 1, -1, 1, -3, 1, 1, 1},
{-1, -3, -1, -1, 1, -3, -1, -1, 1, -1, -3, 1, 1, -3, 1, -3, -3, 3, 1, 1, -1, 3, -1, -1}, {-1, -3, 3, 3, 1, 1, 3, -1, -3, -1, -1, -1, 3, 1, -3, -3, -1, 3, -3, -1, -3, -1, -3, -1},
{1, 1, -1, -1, -3, -1, 3, -1, 3, -1, 1, 3, 1, -1, 3, 1, 3, -3, -3, 1, -1, -1, 1, 3}}; {-1, -3, -1, -1, 1, -3, -1, -1, 1, -1, -3, 1, 1, -3, 1, -3, -3, 3, 1, 1, -1, 3, -1, -1},
{1, 1, -1, -1, -3, -1, 3, -1, 3, -1, 1, 3, 1, -1, 3, 1, 3, -3, -3, 1, -1, -1, 1, 3}};
// Prime numbers used for Section 5.5.1.1 of 36.211
#define NOF_PRIME_NUMBERS 196
static const uint32_t prime_numbers[NOF_PRIME_NUMBERS] = {
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61,
67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151,
157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251,
257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, 353, 359,
367, 373, 379, 383, 389, 397, 401, 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463,
467, 479, 487, 491, 499, 503, 509, 521, 523, 541, 547, 557, 563, 569, 571, 577, 587, 593,
599, 601, 607, 613, 617, 619, 631, 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701,
709, 719, 727, 733, 739, 743, 751, 757, 761, 769, 773, 787, 797, 809, 811, 821, 823, 827,
829, 839, 853, 857, 859, 863, 877, 881, 883, 887, 907, 911, 919, 929, 937, 941, 947, 953,
967, 971, 977, 983, 991, 997, 1009, 1013, 1019, 1021, 1031, 1033, 1039, 1049, 1051, 1061, 1063, 1069,
1087, 1091, 1093, 1097, 1103, 1109, 1117, 1123, 1129, 1151, 1153, 1163, 1171, 1181, 1187, 1193};
#endif #endif

34
lib/include/srslte/phy/utils/primes.h
Unescape Escape View File

@ -0,0 +1,34 @@
/**
*
* \section COPYRIGHT
*
* Copyright 2013-2020 Software Radio Systems Limited
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the distribution.
*
*/
#ifndef SRSLTE_PRIMES_H
#define SRSLTE_PRIMES_H
#include "srslte/config.h"
#include <stdint.h>
/**
* @brief Finds the smallest prime number greater than n
* @param[in] n Provide the number
* @return A prime number below 1193, SRSLTE_ERROR code otherwise
*/
SRSLTE_API int srslte_prime_greater_than(uint32_t n);
/**
* @brief Finds the biggest prime number lesser than n
* @attention the maximum prime number it can return is 1193
* @param[in] n Provide the number
* @return A prime number below 1193, SRSLTE_ERROR code otherwise
*/
SRSLTE_API int srslte_prime_lower_than(uint32_t n);
#endif // SRSLTE_PRIMES_H

30
lib/src/phy/ch_estimation/chest_sl.c
Unescape Escape View File

@ -20,6 +20,7 @@
#include "srslte/phy/ch_estimation/refsignal_ul.h" #include "srslte/phy/ch_estimation/refsignal_ul.h"
#include "srslte/phy/mimo/precoding.h" #include "srslte/phy/mimo/precoding.h"
#include "srslte/phy/utils/debug.h" #include "srslte/phy/utils/debug.h"
#include "srslte/phy/utils/primes.h"
#include "srslte/phy/utils/vector.h" #include "srslte/phy/utils/vector.h"
static int chest_sl_init(srslte_chest_sl_t* q, uint32_t nof_cyclic_shift_seq) static int chest_sl_init(srslte_chest_sl_t* q, uint32_t nof_cyclic_shift_seq)
@ -120,13 +121,12 @@ static int chest_sl_psbch_gen(srslte_chest_sl_t* q)
u[ns] = (f_gh + f_ss) % SRSLTE_SL_N_RU_SEQ; u[ns] = (f_gh + f_ss) % SRSLTE_SL_N_RU_SEQ;
} }
int32_t N_zc = prime_numbers[0]; // N_zc - Zadoff Chu Sequence Length int32_t N_zc = srslte_prime_lower_than(q->M_sc_rs); // N_zc - Zadoff Chu Sequence Length
for (uint32_t i = NOF_PRIME_NUMBERS - 1; i > 0; i--) { if (N_zc < SRSLTE_SUCCESS) {
if (prime_numbers[i] < q->M_sc_rs) { ERROR("Could not find prime number\n");
N_zc = prime_numbers[i]; return SRSLTE_ERROR;
break;
}
} }
for (int j = 0; j < q->nof_dmrs_symbols; ++j) { for (int j = 0; j < q->nof_dmrs_symbols; ++j) {
q->q[j] = srslte_refsignal_get_q(u[j], SRSLTE_SL_BASE_SEQUENCE_NUMBER, N_zc); q->q[j] = srslte_refsignal_get_q(u[j], SRSLTE_SL_BASE_SEQUENCE_NUMBER, N_zc);
float n_sz = (float)N_zc; float n_sz = (float)N_zc;
@ -358,11 +358,10 @@ static int chest_sl_pscch_gen(srslte_chest_sl_t* q, uint32_t cyclic_shift)
} }
break; break;
default: default:
for (uint32_t i = NOF_PRIME_NUMBERS - 1; i > 0; i--) { N_zc = srslte_prime_lower_than(q->M_sc_rs); // N_zc - Zadoff Chu Sequence Length
if (prime_numbers[i] < q->M_sc_rs) { if (N_zc < SRSLTE_SUCCESS) {
N_zc = prime_numbers[i]; ERROR("Could not find prime number\n");
break; return SRSLTE_ERROR;
}
} }
for (int j = 0; j < q->nof_dmrs_symbols; ++j) { for (int j = 0; j < q->nof_dmrs_symbols; ++j) {
q->q[j] = srslte_refsignal_get_q(u[j], SRSLTE_SL_BASE_SEQUENCE_NUMBER, N_zc); q->q[j] = srslte_refsignal_get_q(u[j], SRSLTE_SL_BASE_SEQUENCE_NUMBER, N_zc);
@ -585,11 +584,10 @@ static int chest_sl_pssch_gen(srslte_chest_sl_t* q)
} }
break; break;
default: default:
for (uint32_t i = NOF_PRIME_NUMBERS - 1; i > 0; i--) { N_zc = srslte_prime_lower_than(q->M_sc_rs); // N_zc - Zadoff Chu Sequence Length
if (prime_numbers[i] < q->M_sc_rs) { if (N_zc < SRSLTE_SUCCESS) {
N_zc = prime_numbers[i]; ERROR("Could not find prime number\n");
break; return SRSLTE_ERROR;
}
} }
for (int j = 0; j < q->nof_dmrs_symbols; ++j) { for (int j = 0; j < q->nof_dmrs_symbols; ++j) {
q->q[j] = srslte_refsignal_get_q(u[j], SRSLTE_SL_BASE_SEQUENCE_NUMBER, N_zc); q->q[j] = srslte_refsignal_get_q(u[j], SRSLTE_SL_BASE_SEQUENCE_NUMBER, N_zc);

15
lib/src/phy/ch_estimation/refsignal_ul.c
Unescape Escape View File

@ -22,6 +22,7 @@
#include "srslte/phy/dft/dft_precoding.h" #include "srslte/phy/dft/dft_precoding.h"
#include "srslte/phy/phch/pucch.h" #include "srslte/phy/phch/pucch.h"
#include "srslte/phy/utils/debug.h" #include "srslte/phy/utils/debug.h"
#include "srslte/phy/utils/primes.h"
#include "srslte/phy/utils/vector.h" #include "srslte/phy/utils/vector.h"
// n_dmrs_2 table 5.5.2.1.1-1 from 36.211 // n_dmrs_2 table 5.5.2.1.1-1 from 36.211
@ -204,17 +205,6 @@ int srslte_refsignal_ul_set_cell(srslte_refsignal_ul_t* q, srslte_cell_t cell)
return ret; return ret;
} }
static uint32_t largest_prime_lower_than(uint32_t x)
{
/* get largest prime n_zc<len */
for (uint32_t i = NOF_PRIME_NUMBERS - 1; i > 0; i--) {
if (prime_numbers[i] < x) {
return prime_numbers[i];
}
}
return 0;
}
static void arg_r_uv_2prb(float* arg, uint32_t u) static void arg_r_uv_2prb(float* arg, uint32_t u)
{ {
for (int i = 0; i < 2 * SRSLTE_NRE; i++) { for (int i = 0; i < 2 * SRSLTE_NRE; i++) {
@ -239,8 +229,7 @@ uint32_t srslte_refsignal_get_q(uint32_t u, uint32_t v, uint32_t N_sz)
static void arg_r_uv_mprb(float* arg, uint32_t M_sc, uint32_t u, uint32_t v) static void arg_r_uv_mprb(float* arg, uint32_t M_sc, uint32_t u, uint32_t v)
{ {
int32_t N_sz = srslte_prime_lower_than(M_sc); // N_zc - Zadoff Chu Sequence Length
uint32_t N_sz = largest_prime_lower_than(M_sc);
if (N_sz > 0) { if (N_sz > 0) {
float q = srslte_refsignal_get_q(u, v, N_sz); float q = srslte_refsignal_get_q(u, v, N_sz);
float n_sz = (float)N_sz; float n_sz = (float)N_sz;

55
lib/src/phy/utils/primes.c
Unescape Escape View File

@ -0,0 +1,55 @@
/**
*
* \section COPYRIGHT
*
* Copyright 2013-2020 Software Radio Systems Limited
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the distribution.
*
*/
#include "srslte/phy/utils/primes.h"
#define NOF_PRIME_NUMBERS 196
static const uint32_t prime_numbers[NOF_PRIME_NUMBERS] = {
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61,
67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151,
157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251,
257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, 353, 359,
367, 373, 379, 383, 389, 397, 401, 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463,
467, 479, 487, 491, 499, 503, 509, 521, 523, 541, 547, 557, 563, 569, 571, 577, 587, 593,
599, 601, 607, 613, 617, 619, 631, 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701,
709, 719, 727, 733, 739, 743, 751, 757, 761, 769, 773, 787, 797, 809, 811, 821, 823, 827,
829, 839, 853, 857, 859, 863, 877, 881, 883, 887, 907, 911, 919, 929, 937, 941, 947, 953,
967, 971, 977, 983, 991, 997, 1009, 1013, 1019, 1021, 1031, 1033, 1039, 1049, 1051, 1061, 1063, 1069,
1087, 1091, 1093, 1097, 1103, 1109, 1117, 1123, 1129, 1151, 1153, 1163, 1171, 1181, 1187, 1193};
int srslte_prime_greater_than(uint32_t n)
{
for (uint32_t i = 0; i < NOF_PRIME_NUMBERS; i++) {
if (prime_numbers[i] > n) {
return n;
}
}
return SRSLTE_ERROR_OUT_OF_BOUNDS;
}
int srslte_prime_lower_than(uint32_t n)
{
if (n > prime_numbers[NOF_PRIME_NUMBERS - 1]) {
return SRSLTE_ERROR_OUT_OF_BOUNDS;
}
for (uint32_t i = NOF_PRIME_NUMBERS - 1; i > 0; i--) {
if (prime_numbers[i] < n) {
return n;
}
}
return 2;
}
Write Preview
Loading…
Cancel
Save