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https://github.com/saitohirga/WSJT-X.git
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f3703e0241
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6926 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
738 lines
20 KiB
C
738 lines
20 KiB
C
// main.c
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// Word Error Rate test example for Q-ary RA codes over GF(64)
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//
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// (c) 2016 - Nico Palermo, IV3NWV
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//
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// Thanks to Andrea Montefusco IW0HDV for his help on adapting the sources
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// to OSs other than MS Windows
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//
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// ------------------------------------------------------------------------------
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// This file is part of the qracodes project, a Forward Error Control
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// encoding/decoding package based on Q-ary RA (Repeat and Accumulate) LDPC codes.
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//
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// Files in this package:
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// main.c - this file
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// normrnd.c/.h - random gaussian number generator
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// npfwht.c/.h - Fast Walsh-Hadamard Transforms
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// pdmath.c/.h - Elementary math on probability distributions
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// qra12_63_64_irr_b.c/.h - Tables for a QRA(12,63) irregular RA code over GF(64)
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// qra13_64_64_irr_e.c/.h - Tables for a QRA(13,64) irregular RA code " "
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// qracodes.c/.h - QRA codes encoding/decoding functions
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//
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// -------------------------------------------------------------------------------
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//
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// qracodes is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// qracodes is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with qracodes source distribution.
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// If not, see <http://www.gnu.org/licenses/>.
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// -----------------------------------------------------------------------------
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// Two codes are available for simulations in this sowftware release:
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// QRA12_63_64_IRR_B: K=12 N=63 Q=64 irregular QRA code (defined in qra12_63_64_irr_b.h /.c)
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// QRA13_64_64_IRR_E: K=13 N=64 Q=64 irregular QRA code (defined in qra13_64_64_irr_b.h /.c)
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// Codes with K=13 are designed to include a CRC as the 13th information symbol
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// and improve the code UER (Undetected Error Rate).
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// The CRC symbol is not sent along the channel (the codes are punctured) and the
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// resulting code is still a (12,63) code with an effective code rate of R = 12/63.
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// ------------------------------------------------------------------------------
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// OS dependent defines and includes --------------------------------------------
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#if _WIN32 // note the underscore: without it, it's not msdn official!
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// Windows (x64 and x86)
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#include <windows.h> // required only for GetTickCount(...)
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#include <process.h> // _beginthread
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#endif
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#if defined(__linux__)
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// remove unwanted macros
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#define __cdecl
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// implements Windows API
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#include <time.h>
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unsigned int GetTickCount(void) {
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struct timespec ts;
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unsigned int theTick = 0U;
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clock_gettime( CLOCK_REALTIME, &ts );
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theTick = ts.tv_nsec / 1000000;
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theTick += ts.tv_sec * 1000;
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return theTick;
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}
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// Convert Windows millisecond sleep
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//
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// VOID WINAPI Sleep(_In_ DWORD dwMilliseconds);
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//
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// to Posix usleep (in microseconds)
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//
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// int usleep(useconds_t usec);
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//
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#include <unistd.h>
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#define Sleep(x) usleep(x*1000)
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#endif
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#if defined(__linux__) || ( defined(__MINGW32__) || defined (__MIGW64__) )
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#include <pthread.h>
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#endif
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#if __APPLE__
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include "qracodes.h"
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#include "normrnd.h" // gaussian numbers generator
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#include "pdmath.h" // operations on probability distributions
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// defined codes
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#include "qra12_63_64_irr_b.h"
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#include "qra13_64_64_irr_e.h"
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// -----------------------------------------------------------------------------------
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#define NTHREADS_MAX 160
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// channel types
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#define CHANNEL_AWGN 0
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#define CHANNEL_RAYLEIGH 1
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// amount of a-priori information provided to the decoder
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#define AP_NONE 0
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#define AP_28 1
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#define AP_44 2
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#define AP_56 3
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const char ap_str[4][16] = {
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"None",
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"28 bit",
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"44 bit",
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"56 bit"
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};
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const char fnameout_pfx[2][64] = {
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"wer-awgn-",
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"wer-rayleigh-"
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};
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const char fnameout_sfx[4][64] = {
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"-ap00.txt",
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"-ap28.txt",
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"-ap44.txt",
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"-ap56.txt"
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};
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const int ap_masks_jt65[4][13] = {
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// Each row must be 13 entries long (to handle puntc. codes 13,64)
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// The mask of 13th symbol (crc) is alway initializated to 0
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// AP0 - no a-priori knowledge
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{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
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// AP28 - 1st field known [cq ? ?] or [dst ? ?]
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{0x3F,0x3F,0x3F,0x3F,0x3C, 0, 0, 0, 0, 0, 0, 0},
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// AP44 - 1st and 3rd fields known [cq ? 0] or [dst ? 0]
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{0x3F,0x3F,0x3F,0x3F,0x3C, 0, 0, 0, 0,0x0F,0x3F,0x3F},
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// AP56 - 1st and 2nd fields known [dst src ?]
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{0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x30, 0, 0}
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};
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void ix_mask(const qracode *pcode, float *r, const int *mask, const int *x);
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void printword(char *msg, int *x, int size)
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{
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int k;
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printf("\n%s ",msg);
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for (k=0;k<size;k++)
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printf("%02hx ",x[k]);
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printf("\n");
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}
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typedef struct {
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int channel_type;
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float EbNodB;
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volatile int nt;
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volatile int nerrs;
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volatile int nerrsu;
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volatile int stop;
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volatile int done;
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int ap_index; // index to the a priori knowledge mask
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const qracode *pcode; // pointer to the code descriptor
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int *x; //[qra_K]; input message buffer
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int *y, *ydec; //[qra_N]; encoded/decoded codewords buffers
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float *qra_v2cmsg; //[qra_NMSG*qra_M]; MP decoder v->c msg buffer
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float *qra_c2vmsg; //[qra_NMSG*qra_M]; MP decoder c->v msg buffer
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float *rp; // [qra_N*qra_M]; received samples (real component) buffer
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float *rq; // [qra_N*qra_M]; received samples (imag component) buffer
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float *chp; //[qra_N]; channel gains (real component) buffer
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float *chq; //[qra_N]; channel gains (imag component) buffer
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float *r; //[qra_N*qra_M]; received samples (amplitude) buffer
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float *ix; // [qra_N*qra_M]; // intrinsic information to the MP algorithm
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float *ex; // [qra_N*qra_M]; // extrinsic information from the MP algorithm
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} wer_test_ds;
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typedef void( __cdecl *pwer_test_thread)(wer_test_ds*);
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// crc-6 generator polynomial
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// g(x) = x^6 + a5*x^5 + ... + a1*x + a0
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// g(x) = x^6 + x + 1
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#define CRC6_GEN_POL 0x30 // MSB=a0 LSB=a5
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// g(x) = x^6 + x^2 + x + 1 (as suggested by Joe. See: https://users.ece.cmu.edu/~koopman/crc/)
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// #define CRC6_GEN_POL 0x38 // MSB=a0 LSB=a5. Simulation results are similar
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int calc_crc6(int *x, int sz)
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{
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int k,j,t,sr = 0;
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for (k=0;k<sz;k++) {
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t = x[k];
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for (j=0;j<6;j++) {
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if ((t^sr)&0x01)
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sr = (sr>>1) ^ CRC6_GEN_POL;
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else
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sr = (sr>>1);
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t>>=1;
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}
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}
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return sr;
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}
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void wer_test_thread(wer_test_ds *pdata)
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{
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const qracode *pcode=pdata->pcode;
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const int qra_K = pcode->K;
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const int qra_N = pcode->N;
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const int qra_M = pcode->M;
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const int qra_m = pcode->m;
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const int NSAMPLES = pcode->N*pcode->M;
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const float No = 1.0f; // noise spectral density
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const float sigma = (float)sqrt(No/2.0f); // std dev of noise I/Q components
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const float sigmach = (float)sqrt(1/2.0f); // std dev of channel I/Q gains
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// Eb/No value for which we optimize the bessel metric
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const float EbNodBMetric = 2.8f;
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const float EbNoMetric = (float)pow(10,EbNodBMetric/10);
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int k,t,j,diff;
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float R;
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float EsNoMetric;
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float EbNo, EsNo, Es, A;
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int channel_type, code_type;
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int nt=0; // transmitted codewords
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int nerrs = 0; // total number of errors
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int nerrsu = 0; // number of undetected errors
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int rc;
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// inizialize pointer to required buffers
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int *x=pdata->x; // message buffer
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int *y=pdata->y, *ydec=pdata->ydec; // encoded/decoded codeword buffers
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float *qra_v2cmsg=pdata->qra_v2cmsg; // table of the v->c messages
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float *qra_c2vmsg=pdata->qra_c2vmsg; // table of the c->v messages
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float *rp=pdata->rp; // received samples (real component)
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float *rq=pdata->rq; // received samples (imag component)
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float *chp=pdata->chp; // channel gains (real component)
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float *chq=pdata->chq; // channel gains (imag component)
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float *r=pdata->r; // received samples amplitudes
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float *ix=pdata->ix; // intrinsic information to the MP algorithm
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float *ex=pdata->ex; // extrinsic information from the MP algorithm
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channel_type = pdata->channel_type;
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code_type = pcode->type;
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// define the (true) code rate accordingly to the code type
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switch(code_type) {
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case QRATYPE_CRC:
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R = 1.0f*(qra_K-1)/qra_N;
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break;
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case QRATYPE_CRCPUNCTURED:
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R = 1.0f*(qra_K-1)/(qra_N-1);
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break;
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case QRATYPE_NORMAL:
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default:
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R = 1.0f*(qra_K)/(qra_N);
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}
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EsNoMetric = 1.0f*qra_m*R*EbNoMetric;
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EbNo = (float)pow(10,pdata->EbNodB/10);
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EsNo = 1.0f*qra_m*R*EbNo;
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Es = EsNo*No;
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A = (float)sqrt(Es);
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// encode the input
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if (code_type==QRATYPE_CRC || code_type==QRATYPE_CRCPUNCTURED) {
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// compute the information message symbol check as the (negated) xor of all the
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// information message symbols
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for (k=0;k<(qra_K-1);k++)
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x[k]=k%qra_M;
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x[k]=calc_crc6(x,qra_K-1);
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}
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else
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for (k=0;k<qra_K;k++)
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x[k]=k%qra_M;
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qra_encode(pcode,y,x);
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while (pdata->stop==0) {
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// simulate the channel
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// NOTE: in the case that the code is punctured, for simplicity
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// we compute the channel outputs and the metric also for the crc symbol
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// then we ignore its observation.
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normrnd_s(rp,NSAMPLES,0,sigma);
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normrnd_s(rq,NSAMPLES,0,sigma);
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if (channel_type == CHANNEL_AWGN) {
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for (k=0;k<qra_N;k++)
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rp[k*qra_M+y[k]]+=A;
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}
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else if (channel_type == CHANNEL_RAYLEIGH) {
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normrnd_s(chp,qra_N,0,sigmach);
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normrnd_s(chq,qra_N,0,sigmach);
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for (k=0;k<qra_N;k++) {
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rp[k*qra_M+y[k]]+=A*chp[k];
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rq[k*qra_M+y[k]]+=A*chq[k];
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}
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}
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else {
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pdata->done = 1;
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return; // unknown channel type
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}
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// compute the squares of the amplitudes of the received samples
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for (k=0;k<NSAMPLES;k++)
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r[k] = rp[k]*rp[k] + rq[k]*rq[k];
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// compute the intrinsic symbols probabilities
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qra_mfskbesselmetric(ix,r,pcode->m,pcode->N,EsNoMetric);
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if (code_type==QRATYPE_CRCPUNCTURED) {
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// ignore observations of the CRC symbol as it is not actually sent
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// over the channel
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pd_init(PD_ROWADDR(ix,qra_M,qra_K),pd_uniform(qra_m),qra_M);
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}
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if (pdata->ap_index!=0)
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// mask channel observations with a priori knowledge
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ix_mask(pcode,ix,ap_masks_jt65[pdata->ap_index],x);
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// compute the extrinsic symbols probabilities with the message-passing algorithm
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// stop if extrinsic information does not converges to 1 within the given number of iterations
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rc = qra_extrinsic(pcode,ex,ix,100,qra_v2cmsg,qra_c2vmsg);
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if (rc>=0) { // the MP algorithm converged to Iex~1 in rc iterations
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// decode the codeword
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qra_mapdecode(pcode,ydec,ex,ix);
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// look for undetected errors
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if (code_type==QRATYPE_CRC || code_type==QRATYPE_CRCPUNCTURED) {
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j = 0; diff = 0;
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for (k=0;k<(qra_K-1);k++)
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diff |= (ydec[k]!=x[k]);
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t = calc_crc6(ydec,qra_K-1);
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if (t!=ydec[k]) // error detected - crc doesn't matches
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nerrs += 1;
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else
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if (diff) { // decoded message is not equal to the transmitted one but
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// the crc test passed
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// add as undetected error
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nerrsu += 1;
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nerrs += 1;
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// uncomment to see what the undetected error pattern looks like
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//printword("U", ydec);
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}
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}
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else
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for (k=0;k<qra_K;k++)
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if (ydec[k]!=x[k]) { // decoded msg differs from the transmitted one
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nerrsu += 1; // it's a false decode
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nerrs += 1;
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// uncomment to see what the undetected error pattern looks like
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// printword("U", ydec);
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break;
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}
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}
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else // failed to converge to a solution within the given number of iterations
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nerrs++;
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nt = nt+1;
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pdata->nt=nt;
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pdata->nerrs=nerrs;
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pdata->nerrsu=nerrsu;
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}
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pdata->done=1;
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#if _WIN32
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_endthread();
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#endif
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}
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#if defined(__linux__) || ( defined(__MINGW32__) || defined (__MIGW64__) )
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void *wer_test_pthread(void *p)
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{
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wer_test_thread ((wer_test_ds *)p);
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return 0;
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}
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#endif
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void ix_mask(const qracode *pcode, float *r, const int *mask, const int *x)
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{
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// mask intrinsic information (channel observations) with a priori knowledge
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int k,kk, smask;
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const int qra_K=pcode->K;
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const int qra_M=pcode->M;
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const int qra_m=pcode->m;
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for (k=0;k<qra_K;k++) {
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smask = mask[k];
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if (smask) {
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for (kk=0;kk<qra_M;kk++)
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if (((kk^x[k])&smask)!=0)
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*(PD_ROWADDR(r,qra_M,k)+kk) = 0.f;
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pd_norm(PD_ROWADDR(r,qra_M,k),qra_m);
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}
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}
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}
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int wer_test_proc(const qracode *pcode, int nthreads, int chtype, int ap_index, float *EbNodB, int *nerrstgt, int nitems)
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{
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int k,nn,j,nt,nerrs,nerrsu,nd;
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int cini,cend;
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char fnameout[128];
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FILE *fout;
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wer_test_ds wt[NTHREADS_MAX];
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float pe,avgt;
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nn = sizeof(EbNodB)/sizeof(float); // size of the EbNo array to test
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if (nthreads>NTHREADS_MAX) {
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printf("Error: nthreads should be <=%d\n",NTHREADS_MAX);
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return -1;
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}
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sprintf(fnameout,"%s%s%s",
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fnameout_pfx[chtype],
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pcode->name,
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fnameout_sfx[ap_index]);
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fout = fopen(fnameout,"w");
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fprintf(fout,"# Channel (0=AWGN,1=Rayleigh), Eb/No (dB), Transmitted codewords, Errors, Undetected Errors, Avg dec. time (ms), WER\n");
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printf("\nTesting the code %s over the %s channel\nSimulation data will be saved to %s\n",
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pcode->name,
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chtype==CHANNEL_AWGN?"AWGN":"Rayleigh",
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fnameout);
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fflush (stdout);
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// init fixed thread parameters and preallocate buffers
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for (j=0;j<nthreads;j++) {
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wt[j].channel_type=chtype;
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wt[j].ap_index = ap_index;
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wt[j].pcode = pcode;
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wt[j].x = (int*)malloc(pcode->K*sizeof(int));
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wt[j].y = (int*)malloc(pcode->N*sizeof(int));
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wt[j].ydec = (int*)malloc(pcode->N*sizeof(int));
|
|
wt[j].qra_v2cmsg = (float*)malloc(pcode->NMSG*pcode->M*sizeof(float));
|
|
wt[j].qra_c2vmsg = (float*)malloc(pcode->NMSG*pcode->M*sizeof(float));
|
|
wt[j].rp = (float*)malloc(pcode->N*pcode->M*sizeof(float));
|
|
wt[j].rq = (float*)malloc(pcode->N*pcode->M*sizeof(float));
|
|
wt[j].chp = (float*)malloc(pcode->N*sizeof(float));
|
|
wt[j].chq = (float*)malloc(pcode->N*sizeof(float));
|
|
wt[j].r = (float*)malloc(pcode->N*pcode->M*sizeof(float));
|
|
wt[j].ix = (float*)malloc(pcode->N*pcode->M*sizeof(float));
|
|
wt[j].ex = (float*)malloc(pcode->N*pcode->M*sizeof(float));
|
|
}
|
|
|
|
|
|
for (k=0;k<nitems;k++) {
|
|
|
|
printf("\nTesting at Eb/No=%4.1f dB...",EbNodB[k]);
|
|
fflush (stdout);
|
|
|
|
for (j=0;j<nthreads;j++) {
|
|
wt[j].EbNodB=EbNodB[k];
|
|
wt[j].nt=0;
|
|
wt[j].nerrs=0;
|
|
wt[j].nerrsu=0;
|
|
wt[j].done = 0;
|
|
wt[j].stop = 0;
|
|
#if defined(__linux__) || ( defined(__MINGW32__) || defined (__MIGW64__) )
|
|
if (pthread_create (&wt[j].thread, 0, wer_test_pthread, &wt[j])) {
|
|
perror ("Creating thread: ");
|
|
exit (255);
|
|
}
|
|
#else
|
|
_beginthread((void*)(void*)wer_test_thread,0,&wt[j]);
|
|
#endif
|
|
}
|
|
|
|
nd = 0;
|
|
cini = GetTickCount();
|
|
|
|
while (1) {
|
|
// count errors
|
|
nerrs = 0;
|
|
for (j=0;j<nthreads;j++)
|
|
nerrs += wt[j].nerrs;
|
|
// stop the working threads
|
|
// if number of errors reached at this Eb/No value
|
|
if (nerrs>=nerrstgt[k]) {
|
|
for (j=0;j<nthreads;j++)
|
|
wt[j].stop = 1;
|
|
break;
|
|
}
|
|
else { // continue with the simulation
|
|
Sleep(2);
|
|
nd = (nd+1)%100;
|
|
if (nd==0) {
|
|
printf(".");
|
|
fflush (stdout);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
cend = GetTickCount();
|
|
|
|
// wait for the working threads to exit
|
|
for (j=0;j<nthreads;j++)
|
|
#if defined(__linux__) || ( defined(__MINGW32__) || defined (__MIGW64__) )
|
|
{
|
|
void *rc;
|
|
if (pthread_join (wt[j].thread, &rc)) {
|
|
perror ("Waiting working threads to exit");
|
|
exit (255);
|
|
}
|
|
}
|
|
#else
|
|
while(wt[j].done==0)
|
|
Sleep(1);
|
|
|
|
#endif
|
|
printf("\n");
|
|
fflush (stdout);
|
|
|
|
// compute the total number of transmitted codewords
|
|
// the total number of errors and the total number of undetected errors
|
|
nt = 0;
|
|
nerrs =0;
|
|
nerrsu = 0;
|
|
for (j=0;j<nthreads;j++) {
|
|
nt += wt[j].nt;
|
|
nerrs += wt[j].nerrs;
|
|
nerrsu += wt[j].nerrsu;
|
|
}
|
|
|
|
pe = 1.0f*nerrs/nt; // word error rate
|
|
avgt = 1.0f*(cend-cini)/nt; // average time per decode (ms)
|
|
|
|
printf("Elapsed Time=%6.1fs (%5.2fms/word)\nTransmitted=%8d - Errors=%6d - Undetected=%3d - WER=%.2e\n",
|
|
0.001f*(cend-cini),
|
|
avgt, nt, nerrs, nerrsu, pe);
|
|
fflush (stdout);
|
|
|
|
// save simulation data to output file
|
|
fprintf(fout,"%01d %.2f %d %d %d %.2f %.2e\n",
|
|
chtype,
|
|
EbNodB[k],
|
|
nt,
|
|
nerrs,
|
|
nerrsu,
|
|
avgt,
|
|
pe);
|
|
|
|
}
|
|
|
|
fclose(fout);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
const qracode *codetotest[] = {
|
|
&qra_12_63_64_irr_b,
|
|
&qra_13_64_64_irr_e
|
|
};
|
|
|
|
void syntax(void)
|
|
{
|
|
printf("\nQ-ary Repeat-Accumulate Code Word Error Rate Simulator\n");
|
|
printf("2016, Nico Palermo - IV3NWV\n\n");
|
|
printf("Syntax: qracodes [-q<code_index>] [-t<threads>] [-c<ch_type>] [-a<ap_index>] [-f<fnamein>[-h]\n");
|
|
printf("Options: \n");
|
|
printf(" -q<code_index>: code to simulate. 0=qra_12_63_64_irr_b\n");
|
|
printf(" 1=qra_13_64_64_irr_e (default)\n");
|
|
printf(" -t<threads> : number of threads to be used for the simulation [1..24]\n");
|
|
printf(" (default=8)\n");
|
|
printf(" -c<ch_type> : channel_type. 0=AWGN 1=Rayleigh \n");
|
|
printf(" (default=AWGN)\n");
|
|
printf(" -a<ap_index> : amount of a-priori information provided to decoder. \n");
|
|
printf(" 0= No a-priori (default)\n");
|
|
printf(" 1= 28 bit \n");
|
|
printf(" 2= 44 bit \n");
|
|
printf(" 3= 56 bit \n");
|
|
printf(" -f<fnamein> : name of the file containing the Eb/No values to be simulated\n");
|
|
printf(" (default=ebnovalues.txt)\n");
|
|
printf(" This file should contain lines in this format:\n");
|
|
printf(" # Eb/No(dB) Target Errors\n");
|
|
printf(" 0.1 5000\n");
|
|
printf(" 0.6 5000\n");
|
|
printf(" 1.1 1000\n");
|
|
printf(" 1.6 1000\n");
|
|
printf(" ...\n");
|
|
printf(" (lines beginning with a # are treated as comments\n\n");
|
|
}
|
|
|
|
#define SIM_POINTS_MAX 20
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
|
|
float EbNodB[SIM_POINTS_MAX];
|
|
int nerrstgt[SIM_POINTS_MAX];
|
|
FILE *fin;
|
|
|
|
char fnamein[128]= "ebnovalues.txt";
|
|
char buf[128];
|
|
|
|
int nitems = 0;
|
|
int code_idx = 1;
|
|
int nthreads = 8;
|
|
int ch_type = CHANNEL_AWGN;
|
|
int ap_index = AP_NONE;
|
|
|
|
// parse command line
|
|
while(--argc) {
|
|
argv++;
|
|
if (strncmp(*argv,"-h",2)==0) {
|
|
syntax();
|
|
return 0;
|
|
}
|
|
else
|
|
if (strncmp(*argv,"-q",2)==0) {
|
|
code_idx = (int)atoi((*argv)+2);
|
|
if (code_idx>1) {
|
|
printf("Invalid code index\n");
|
|
syntax();
|
|
return -1;
|
|
}
|
|
}
|
|
else
|
|
if (strncmp(*argv,"-t",2)==0) {
|
|
nthreads = (int)atoi((*argv)+2);
|
|
printf("nthreads = %d\n",nthreads);
|
|
if (nthreads>NTHREADS_MAX) {
|
|
printf("Invalid number of threads\n");
|
|
syntax();
|
|
return -1;
|
|
}
|
|
}
|
|
else
|
|
if (strncmp(*argv,"-c",2)==0) {
|
|
ch_type = (int)atoi((*argv)+2);
|
|
if (ch_type>CHANNEL_RAYLEIGH) {
|
|
printf("Invalid channel type\n");
|
|
syntax();
|
|
return -1;
|
|
}
|
|
}
|
|
else
|
|
if (strncmp(*argv,"-a",2)==0) {
|
|
ap_index = (int)atoi((*argv)+2);
|
|
if (ap_index>AP_56) {
|
|
printf("Invalid a-priori information index\n");
|
|
syntax();
|
|
return -1;
|
|
}
|
|
}
|
|
else
|
|
if (strncmp(*argv,"-f",2)==0) {
|
|
strncpy(fnamein,(*argv)+2,127);
|
|
}
|
|
else
|
|
if (strncmp(*argv,"-h",2)==0) {
|
|
syntax();
|
|
return -1;
|
|
}
|
|
else {
|
|
printf("Invalid option\n");
|
|
syntax();
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
// parse points to be simulated from the input file
|
|
fin = fopen(fnamein,"r");
|
|
if (!fin) {
|
|
printf("Can't open file: %s\n",fnamein);
|
|
syntax();
|
|
}
|
|
|
|
while (fgets(buf,128,fin)!=0)
|
|
if (*buf=='#' || *buf=='\n' )
|
|
continue;
|
|
else
|
|
if (nitems==SIM_POINTS_MAX)
|
|
break;
|
|
else
|
|
if (sscanf(buf,"%f %u",&EbNodB[nitems],&nerrstgt[nitems])!=2) {
|
|
printf("Invalid input file format\n");
|
|
syntax();
|
|
return -1;
|
|
}
|
|
else
|
|
nitems++;
|
|
|
|
fclose(fin);
|
|
|
|
if (nitems==0) {
|
|
printf("No Eb/No point specified in file %s\n",fnamein);
|
|
syntax();
|
|
return -1;
|
|
}
|
|
|
|
printf("\nQ-ary Repeat-Accumulate Code Word Error Rate Simulator\n");
|
|
printf("2016, Nico Palermo - IV3NWV\n\n");
|
|
|
|
printf("Nthreads = %d\n",nthreads);
|
|
printf("Channel = %s\n",ch_type==CHANNEL_AWGN?"AWGN":"Rayleigh");
|
|
printf("Codename = %s\n",codetotest[code_idx]->name);
|
|
printf("A-priori = %s\n",ap_str[ap_index]);
|
|
printf("Eb/No input file = %s\n\n",fnamein);
|
|
|
|
wer_test_proc(codetotest[code_idx], nthreads, ch_type, ap_index, EbNodB, nerrstgt, nitems);
|
|
|
|
return 0;
|
|
}
|
|
|