polartest.c 7.14 KB
Newer Older
Guy De Souza's avatar
Guy De Souza committed
1 2 3 4 5 6 7 8 9
#include <math.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <time.h>

#include "PHY/CODING/nrPolar_tools/nr_polar_defs.h"
yilmazt's avatar
yilmazt committed
10
#include "SIMULATION/TOOLS/sim.h"
Guy De Souza's avatar
Guy De Souza committed
11

yilmazt's avatar
yilmazt committed
12
//#define DEBUG_POLAR_PARAMS
yilmazt's avatar
yilmazt committed
13

Guy De Souza's avatar
Guy De Souza committed
14 15 16 17 18 19 20 21 22 23 24
int main(int argc, char *argv[]) {

	//Initiate timing. (Results depend on CPU Frequency. Therefore, might change due to performance variances during simulation.)
	time_stats_t timeEncoder,timeDecoder;
	opp_enabled=1;
	cpu_freq_GHz = get_cpu_freq_GHz();
	reset_meas(&timeEncoder);
	reset_meas(&timeDecoder);

	randominit(0);
	//Default simulation values (Aim for iterations = 1000000.)
yilmazt's avatar
yilmazt committed
25
	int itr, iterations = 1000, arguments, polarMessageType = 0; //0=PBCH, 1=DCI, -1=UCI
yilmazt's avatar
yilmazt committed
26
	double SNRstart = -20.0, SNRstop = 0.0, SNRinc= 0.5; //dB
Guy De Souza's avatar
Guy De Souza committed
27 28 29 30

	double SNR, SNR_lin;
	int16_t nBitError = 0; // -1 = Decoding failed (All list entries have failed the CRC checks).
	int8_t decoderState=0, blockErrorState=0; //0 = Success, -1 = Decoding failed, 1 = Block Error.
yilmazt's avatar
yilmazt committed
31
	uint16_t testLength = 0, coderLength = 0, blockErrorCumulative=0, bitErrorCumulative=0;
Guy De Souza's avatar
Guy De Souza committed
32
	double timeEncoderCumulative = 0, timeDecoderCumulative = 0;
33
	uint8_t aggregation_level;
Guy De Souza's avatar
Guy De Souza committed
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71

	while ((arguments = getopt (argc, argv, "s:d:f:m:i:l:a:")) != -1)
	switch (arguments)
	{
		case 's':
			SNRstart = atof(optarg);
			printf("SNRstart = %f\n", SNRstart);
			break;

		case 'd':
			SNRinc = atof(optarg);
			break;

		case 'f':
			SNRstop = atof(optarg);
			break;

		case 'm':
			polarMessageType = atoi(optarg);
			break;

		case 'i':
			iterations = atoi(optarg);
			break;

		case 'l':
			decoderListSize = (uint8_t) atoi(optarg);
			break;

		case 'a':
			pathMetricAppr = (uint8_t) atoi(optarg);
			break;

		default:
			perror("[polartest.c] Problem at argument parsing with getopt");
			abort ();
	}

yilmazt's avatar
yilmazt committed
72
	if (polarMessageType == 0) { //PBCH
Guy De Souza's avatar
Guy De Souza committed
73 74
		testLength = NR_POLAR_PBCH_PAYLOAD_BITS;
		coderLength = NR_POLAR_PBCH_E;
75
		aggregation_level = NR_POLAR_PBCH_AGGREGATION_LEVEL;
yilmazt's avatar
yilmazt committed
76
	} else if (polarMessageType == 1) { //DCI
77 78 79
		//testLength = nr_get_dci_size(params_rel15->dci_format, params_rel15->rnti_type, &fp->initial_bwp_dl, cfg);
		testLength = 20;
		coderLength = 108; //to be changed by aggregate level function.
yilmazt's avatar
yilmazt committed
80
	} else if (polarMessageType == -1) { //UCI
Guy De Souza's avatar
Guy De Souza committed
81 82 83 84 85 86 87
		//testLength = ;
		//coderLength = ;
	}

	//Logging
	time_t currentTime;
	time (&currentTime);
yilmazt's avatar
yilmazt committed
88
	char *folderName, fileName[512], currentTimeInfo[25];
Guy De Souza's avatar
Guy De Souza committed
89

yilmazt's avatar
yilmazt committed
90 91 92
	folderName=getenv("HOME");
	strcat(folderName,"/Desktop/polartestResults");
	sprintf(fileName,"%s/_ListSize_%d_pmAppr_%d_Payload_%d_Itr_%d",folderName,decoderListSize,pathMetricAppr,testLength,iterations);
Guy De Souza's avatar
Guy De Souza committed
93 94 95
	strftime(currentTimeInfo, 25, "_%Y-%m-%d-%H-%M-%S.csv", localtime(&currentTime));
	strcat(fileName,currentTimeInfo);

yilmazt's avatar
yilmazt committed
96
	//Create "~/Desktop/polartestResults" folder if it doesn't already exist.
Guy De Souza's avatar
Guy De Souza committed
97
	struct stat folder = {0};
yilmazt's avatar
yilmazt committed
98
	if (stat(folderName, &folder) == -1) mkdir(folderName, S_IRWXU | S_IRWXG | S_IRWXO);
Guy De Souza's avatar
Guy De Souza committed
99

yilmazt's avatar
yilmazt committed
100
	FILE* logFile;
Guy De Souza's avatar
Guy De Souza committed
101 102 103 104 105 106 107 108 109 110 111 112 113 114
    logFile = fopen(fileName, "w");
    if (logFile==NULL) {
        fprintf(stderr,"[polartest.c] Problem creating file %s with fopen\n",fileName);
        exit(-1);
      }
    fprintf(logFile,",SNR,nBitError,blockErrorState,t_encoder[us],t_decoder[us]\n");

	uint8_t *testInput = malloc(sizeof(uint8_t) * testLength); //generate randomly
	uint8_t *encoderOutput = malloc(sizeof(uint8_t) * coderLength);
	double *modulatedInput = malloc (sizeof(double) * coderLength); //channel input

	double *channelOutput  = malloc (sizeof(double) * coderLength); //add noise
	uint8_t *estimatedOutput = malloc(sizeof(uint8_t) * testLength); //decoder output

yilmazt's avatar
yilmazt committed
115
	t_nrPolar_paramsPtr nrPolar_params = NULL;
116
	nr_polar_init(&nrPolar_params, polarMessageType, testLength, aggregation_level);
yilmazt's avatar
yilmazt committed
117 118 119 120 121 122
#ifdef DEBUG_POLAR_PARAMS
	nr_polar_init(&nrPolar_params, polarMessageType, testLength, aggregation_level);
	nr_polar_init(&nrPolar_params, 1, 20, 1);
	nr_polar_init(&nrPolar_params, 1, 21, 1);
	nr_polar_init(&nrPolar_params, polarMessageType, testLength, aggregation_level);
	nr_polar_print_polarParams(nrPolar_params);
yilmazt's avatar
yilmazt committed
123 124 125 126 127

	uint32_t in[4];
	in[0]=0x01189400;
	in[1]=0xffffff0f;
	uint8_t *out = malloc(sizeof(uint8_t) * 41);
yilmazt's avatar
yilmazt committed
128
	nr_bit2byte_uint32_8_t(in, 41, out);
yilmazt's avatar
yilmazt committed
129 130
	for (int i=0;i<41;i++)
		printf("out[%d]=%d\n",i,out[i]);
yilmazt's avatar
yilmazt committed
131 132 133
	uint32_t inn[4];
	nr_byte2bit_uint8_32_t(out, 41, inn);
	printf("inn[0]=%#x, inn[1]=%#x\n",inn[0],inn[1]);
yilmazt's avatar
yilmazt committed
134 135 136
	return (0);
#endif

137
	t_nrPolar_paramsPtr currentPtr = nr_polar_params(nrPolar_params, polarMessageType, testLength);
Guy De Souza's avatar
Guy De Souza committed
138 139

	// We assume no a priori knowledge available about the payload.
yilmazt's avatar
yilmazt committed
140 141
	double aPrioriArray[currentPtr->payloadBits];
	for (int i=0; i<currentPtr->payloadBits; i++) aPrioriArray[i] = NAN;
Guy De Souza's avatar
Guy De Souza committed
142 143 144 145 146 147 148 149

	for (SNR = SNRstart; SNR <= SNRstop; SNR += SNRinc) {
		SNR_lin = pow(10, SNR/10);
		for (itr = 1; itr <= iterations; itr++) {

		for(int i=0; i<testLength; i++) testInput[i]=(uint8_t) (rand() % 2);

		start_meas(&timeEncoder);
yilmazt's avatar
yilmazt committed
150
		polar_encoder(testInput, encoderOutput, currentPtr);
Guy De Souza's avatar
Guy De Souza committed
151 152 153 154 155 156 157 158 159 160
		stop_meas(&timeEncoder);

		//BPSK modulation
		for(int i=0; i<coderLength; i++) {
			if (encoderOutput[i] == 0)
				modulatedInput[i]=1/sqrt(2);
			else
				modulatedInput[i]=(-1)/sqrt(2);

			channelOutput[i] = modulatedInput[i] + (gaussdouble(0.0,1.0) * (1/sqrt(2*SNR_lin)));
161
			printf("%f\n",channelOutput[i]);
Guy De Souza's avatar
Guy De Souza committed
162 163 164
		}


165

Guy De Souza's avatar
Guy De Souza committed
166
		start_meas(&timeDecoder);
167
		/*decoderState = polar_decoder(channelOutput,
yilmazt's avatar
yilmazt committed
168 169
									 estimatedOutput,
									 currentPtr,
170
									 NR_POLAR_DECODER_LISTSIZE,
yilmazt's avatar
yilmazt committed
171
									 aPrioriArray,
172 173 174 175 176 177 178
									 NR_POLAR_DECODER_PATH_METRIC_APPROXIMATION);*/
		decoderState = polar_decoder_aPriori(channelOutput,
											 estimatedOutput,
											 currentPtr,
											 NR_POLAR_DECODER_LISTSIZE,
											 NR_POLAR_DECODER_PATH_METRIC_APPROXIMATION,
											 aPrioriArray);
Guy De Souza's avatar
Guy De Souza committed
179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232
		stop_meas(&timeDecoder);

		//calculate errors
		if (decoderState==-1) {
			blockErrorState=-1;
			nBitError=-1;
		} else {
			for(int i=0; i<testLength; i++){
				if (estimatedOutput[i]!=testInput[i]) nBitError++;
			}
			if (nBitError>0) blockErrorState=1;
		}

		//Iteration times are in microseconds.
		timeEncoderCumulative+=(timeEncoder.diff_now/(cpu_freq_GHz*1000.0));
		timeDecoderCumulative+=(timeDecoder.diff_now/(cpu_freq_GHz*1000.0));
		fprintf(logFile,",%f,%d,%d,%f,%f\n", SNR, nBitError, blockErrorState,
				(timeEncoder.diff_now/(cpu_freq_GHz*1000.0)), (timeDecoder.diff_now/(cpu_freq_GHz*1000.0)));

		if (nBitError<0) {
			blockErrorCumulative++;
			bitErrorCumulative+=testLength;
		} else {
			blockErrorCumulative+=blockErrorState;
			bitErrorCumulative+=nBitError;
		}

		decoderState=0;
		nBitError=0;
		blockErrorState=0;

		}
		//Calculate error statistics for the SNR.
		printf("[ListSize=%d, Appr=%d] SNR=%+8.3f, BLER=%9.6f, BER=%12.9f, t_Encoder=%9.3fus, t_Decoder=%9.3fus\n",
				decoderListSize, pathMetricAppr, SNR, ((double)blockErrorCumulative/iterations),
				((double)bitErrorCumulative / (iterations*testLength)),
				(timeEncoderCumulative/iterations),timeDecoderCumulative/iterations);

		blockErrorCumulative = 0; bitErrorCumulative = 0;
		timeEncoderCumulative = 0; timeDecoderCumulative = 0;
	}

	print_meas(&timeEncoder,"polar_encoder",NULL,NULL);
	print_meas(&timeDecoder,"polar_decoder",NULL,NULL);

	fclose(logFile);
	free(testInput);
	free(encoderOutput);
	free(modulatedInput);
	free(channelOutput);
	free(estimatedOutput);

	return (0);
}