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Commit f0e7c3da authored by letr's avatar letr Committed by Florian Kaltenberger
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new algorithm

parent 1cdf7af3
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Showing with 229 additions and 185 deletions
openair1/PHY/CODING/TESTBENCH/ldpctest.c
View file @ f0e7c3da
...@@ -65,18 +65,7 @@ char quantize(double D,double x,unsigned char B) ...@@ -65,18 +65,7 @@ char quantize(double D,double x,unsigned char B)
} }
#define MAX_BLOCK_LENGTH 8448 #define MAX_BLOCK_LENGTH 8448
/*
int test_ldpc(unsigned int coded_bits,
double sigma,
unsigned char qbits,
unsigned int block_length,
unsigned int ntrials,
unsigned int *errors,
unsigned int *trials,
unsigned int *uerrors,
unsigned int *crc_misses,
unsigned int *iterations)
*/
int test_ldpc(short No_iteration, int test_ldpc(short No_iteration,
double rate, double rate,
double SNR, double SNR,
...@@ -87,6 +76,11 @@ int test_ldpc(short No_iteration, ...@@ -87,6 +76,11 @@ int test_ldpc(short No_iteration,
unsigned int *crc_misses) unsigned int *crc_misses)
{ {
//clock initiate
time_stats_t time;
opp_enabled=1;
cpu_freq_GHz = get_cpu_freq_GHz();
short test_input[block_length]; short test_input[block_length];
short *c; //padded codeword short *c; //padded codeword
short *esimated_output; short *esimated_output;
...@@ -98,7 +92,7 @@ int test_ldpc(short No_iteration, ...@@ -98,7 +92,7 @@ int test_ldpc(short No_iteration,
short *Gen_shift_values, *no_shift_values, *pointer_shift_values; short *Gen_shift_values, *no_shift_values, *pointer_shift_values;
short BG,Zc,Kb,nrows,ncols; short BG,Zc,Kb,nrows,ncols;
int i1,i2,i3,i4,t; int i1,i2,i3,i4,i5,i6,t,temp,k;
//Table of possible lifting sizes //Table of possible lifting sizes
short lift_size[51]={2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,18,20,22,24,26,28,30,32,36,40,44,48,52,56,60,64,72,80,88,96,104,112,120,128,144,160,176,192,208,224,240,256,288,320,352,384}; short lift_size[51]={2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,18,20,22,24,26,28,30,32,36,40,44,48,52,56,60,64,72,80,88,96,104,112,120,128,144,160,176,192,208,224,240,256,288,320,352,384};
...@@ -113,7 +107,9 @@ for (i=0; i<block_length; i++) { ...@@ -113,7 +107,9 @@ for (i=0; i<block_length; i++) {
//test_input[i] = (unsigned char)(taus()&0xff); //test_input[i] = (unsigned char)(taus()&0xff);
test_input[i]=rand()%2; test_input[i]=rand()%2;
//test_input[i]=i%2;
} }
start_meas(&time);
//determine number of bits in codeword //determine number of bits in codeword
if (block_length>3840) if (block_length>3840)
...@@ -156,8 +152,10 @@ for (i=0; i<block_length; i++) { ...@@ -156,8 +152,10 @@ for (i=0; i<block_length; i++) {
pointer_shift_values=(short*) pointer_shift_values_BG1; pointer_shift_values=(short*) pointer_shift_values_BG1;
if (Zc==2||Zc==4||Zc==8||Zc==16||Zc==32||Zc==64||Zc==128||Zc==256) if (Zc==2||Zc==4||Zc==8||Zc==16||Zc==32||Zc==64||Zc==128||Zc==256)
Gen_shift_values=(short*) Gen_shift_values_BG1_a_2; Gen_shift_values=(short*) Gen_shift_values_BG1_a_2;
else if (Zc==3||Zc==6||Zc==12||Zc==24||Zc==48||Zc==96||Zc==192||Zc==384) // else if (Zc==3||Zc==6||Zc==12||Zc==24||Zc==48||Zc==96||Zc==192||Zc==384)
Gen_shift_values=(short*) Gen_shift_values_BG1_a_3; //Gen_shift_values=(short*) Gen_shift_values_BG1_a_3;
else if (Zc==384)
Gen_shift_values=(short*) Gen_shift_values_BG1_Z_384;
else if (Zc==5||Zc==10||Zc==20||Zc==40||Zc==80||Zc==160||Zc==320) else if (Zc==5||Zc==10||Zc==20||Zc==40||Zc==80||Zc==160||Zc==320)
Gen_shift_values=(short*) Gen_shift_values_BG1_a_5; Gen_shift_values=(short*) Gen_shift_values_BG1_a_5;
else if (Zc==7||Zc==14||Zc==28||Zc==56||Zc==112||Zc==224) else if (Zc==7||Zc==14||Zc==28||Zc==56||Zc==112||Zc==224)
...@@ -176,8 +174,10 @@ for (i=0; i<block_length; i++) { ...@@ -176,8 +174,10 @@ for (i=0; i<block_length; i++) {
{ {
no_shift_values=(short*) no_shift_values_BG2; no_shift_values=(short*) no_shift_values_BG2;
pointer_shift_values=(short*) pointer_shift_values_BG2; pointer_shift_values=(short*) pointer_shift_values_BG2;
if (Zc==2||Zc==4||Zc==8||Zc==16||Zc==32||Zc==64||Zc==128||Zc==256) //if (Zc==2||Zc==4||Zc==8||Zc==16||Zc==32||Zc==64||Zc==128||Zc==256)
Gen_shift_values=(short*) Gen_shift_values_BG2_a_2; // Gen_shift_values=(short*) Gen_shift_values_BG2_a_2;
if (Zc==128)
Gen_shift_values=(short*) Gen_shift_values_BG2_Z_128;
else if (Zc==3||Zc==6||Zc==12||Zc==24||Zc==48||Zc==96||Zc==192||Zc==384) else if (Zc==3||Zc==6||Zc==12||Zc==24||Zc==48||Zc==96||Zc==192||Zc==384)
Gen_shift_values=(short*) Gen_shift_values_BG2_a_3; Gen_shift_values=(short*) Gen_shift_values_BG2_a_3;
else if (Zc==5||Zc==10||Zc==20||Zc==40||Zc==80||Zc==160||Zc==320) else if (Zc==5||Zc==10||Zc==20||Zc==40||Zc==80||Zc==160||Zc==320)
...@@ -194,55 +194,82 @@ for (i=0; i<block_length; i++) { ...@@ -194,55 +194,82 @@ for (i=0; i<block_length; i++) {
Gen_shift_values=(short*) Gen_shift_values_BG2_a_15; Gen_shift_values=(short*) Gen_shift_values_BG2_a_15;
} }
c=(short *)malloc(sizeof(short) * Kb * Zc); c=(short *)malloc(sizeof(short) * Kb * Zc);
channel_input = (short *)malloc( (Kb+nrows) * Zc*sizeof(short)); channel_input = (short *)malloc( (Kb+nrows) * Zc *sizeof(short));
modulated_input = (double *)malloc( (Kb+nrows) * Zc*sizeof(double));
//channel_output = (short *)malloc( (Kb+nrows) * Zc*sizeof(short));
channel_output = (double *)malloc( (Kb+nrows) * Zc*sizeof(double));
channel_output_fixed = (short *)malloc( (Kb+nrows) * Zc*sizeof(short));
//padded input sequence //padded input sequence
memset(c,0,sizeof(short) * Kb * Zc); memset(c,0,sizeof(short) * Kb * Zc);
memcpy(c,test_input,block_length * sizeof(short)); memcpy(c,test_input,block_length * sizeof(short));
//start_meas(&time);
//encode the input sequence //encode the input sequence
memset(channel_input,0,(Kb+nrows) * Zc*sizeof(short)); memset(channel_input,0,(Kb+nrows) * Zc*sizeof(short));
// parity check part // parity check part
for (i1=0,t=Kb*Zc; i1 < nrows; i1++)
{
for (i2=0; i2 < Zc; i2++) for (i2=0; i2 < Zc; i2++)
{
t=Kb*Zc+i2;
//rotate matrix here
for (i5=0; i5 < Kb; i5++)
{
temp = c[i5*Zc];
memmove(&c[i5*Zc], &c[i5*Zc+1], (Zc-1)*sizeof(short));
c[i5*Zc+Zc-1] = temp;
//for (i6 = 0; i6 < Zc-1; i6++)
//for (i6 = i5*Zc; i6 < i5*Zc + Zc-1; i6++)
//{
//c[i5*Zc+i6] = c[i5*Zc+i6+1];
//c[i6] = c[i6+1];
//}
//c[i5*Zc+i6] = temp;
//c[i6] = temp;
}
for (i1=0; i1 < nrows; i1++)
{ {
for (i3=0; i3 < Kb; i3++) for (i3=0; i3 < Kb; i3++)
{ {
for (i4=0; i4 < no_shift_values[i1 * ncols + i3]; i4++) for (i4=0; i4 < no_shift_values[i1 * ncols + i3]; i4++)
{ {
channel_input[t] = channel_input[t] + c[ i3*Zc + (Gen_shift_values[ pointer_shift_values[i1 * ncols + i3]+i4 ] + i2 + Zc) % Zc ]; channel_input[t+i1*Zc] = channel_input[t+i1*Zc] + c[ i3*Zc + Gen_shift_values[ pointer_shift_values[i1 * ncols + i3]+i4 ] ];
//start pointer %element %shift Z
} }
} }
channel_input[t]=channel_input[t]&1; channel_input[t+i1*Zc]=channel_input[t+i1*Zc]&1;
t++;
} }
/*
for (i1=0; i1 < nrows; i1++)
{
k=i1*Zc;
for (i3=0; i3 < Kb; i3++)
{
for (i4=0; i4 < no_shift_values[i1 * ncols + i3]; i4++)
{
channel_input[t+k] = channel_input[t+k] + c[ i3*Zc + Gen_shift_values[ i4] ];
} }
}
channel_input[t+k]=channel_input[t+k]&1;
}
*/
}
//stop_meas(&time);
// information part // information part
memcpy(channel_input,c,Kb*Zc*sizeof(short)); memcpy(channel_input,c,Kb*Zc*sizeof(short));
stop_meas(&time);
//for (i=0;i<(Kb+nrows) * Zc;i++) print_meas_now(&time, "", stdout);
//for (i=(Kb+nrows) * Zc-10;i<(Kb+nrows) * Zc;i++)
// printf("channel_input[%d]=%d\n",i,channel_input[i]); // printf("channel_input[%d]=%d\n",i,channel_input[i]);
//replace with ldpc encoder, write to channel_input //channel
/* modulated_input = (double *)malloc( (Kb+nrows) * Zc*sizeof(double));
dlsch_encoding(test_input, //channel_output = (short *)malloc( (Kb+nrows) * Zc*sizeof(short));
&PHY_vars_eNB->lte_frame_parms, channel_output = (double *)malloc( (Kb+nrows) * Zc*sizeof(double));
num_pdcch_symbols, channel_output_fixed = (short *)malloc( (Kb+nrows) * Zc*sizeof(short));
PHY_vars_eNB->dlsch_eNB[0][0], memset(channel_output_fixed,0,(Kb+nrows) * Zc*sizeof(short));
0, for (i = 2*Zc; i < (Kb+nrows) * Zc; i++) {
subframe,
&PHY_vars_eNB->dlsch_rate_matching_stats,
&PHY_vars_eNB->dlsch_turbo_encoding_stats,
&PHY_vars_eNB->dlsch_interleaving_stats);
*/
for (i = 0; i < (Kb+nrows) * Zc; i++) {
#ifdef DEBUG_CODER #ifdef DEBUG_CODER
if ((i&0xf)==0) if ((i&0xf)==0)
printf("\ne %d..%d: ",i,i+15); printf("\ne %d..%d: ",i,i+15);
...@@ -257,27 +284,20 @@ channel_output_fixed[i] = (short) ((channel_output[i]*128)<0?(channel_output[i]* ...@@ -257,27 +284,20 @@ channel_output_fixed[i] = (short) ((channel_output[i]*128)<0?(channel_output[i]*
//printf("%lf %d\n",channel_output[i], channel_output_fixed[i]); //printf("%lf %d\n",channel_output[i], channel_output_fixed[i]);
//printf("v[%d]=%lf\n",i,modulated_input[i]); //printf("v[%d]=%lf\n",i,modulated_input[i]);
} }
//for (i=(Kb+nrows) * Zc-5;i<(Kb+nrows) * Zc;i++)
//{
// printf("channel_input[%d]=%d\n",i,channel_input[i]);
//printf("%lf %d\n",channel_output[i], channel_output_fixed[i]);
//printf("v[%d]=%lf\n",i,modulated_input[i]);}
#ifdef DEBUG_CODER #ifdef DEBUG_CODER
printf("\n"); printf("\n");
exit(-1); exit(-1);
#endif #endif
/*
esimated_output=ldpc_decoder(channel_output_fixed, block_length, No_iteration, rate); esimated_output=ldpc_decoder(channel_output_fixed, block_length, No_iteration, rate);
//for (i=0;i<(Kb+nrows) * Zc;i++) //for (i=(Kb+nrows) * Zc-5;i<(Kb+nrows) * Zc;i++)
// printf("esimated_output[%d]=%d\n",i,esimated_output[i]); // printf("esimated_output[%d]=%d\n",i,esimated_output[i]);
// replace this with ldpc decoder
/*
ret = dlsch_decoding(PHY_vars_UE,
channel_output,
&PHY_vars_UE->lte_frame_parms,
PHY_vars_UE->dlsch_ue[0][0],
PHY_vars_UE->dlsch_ue[0][0]->harq_processes[PHY_vars_UE->dlsch_ue[0][0]->current_harq_pid],
frame,
subframe,
PHY_vars_UE->dlsch_ue[0][0]->current_harq_pid,
num_pdcch_symbols,1);
*/
for (i=0;i<(Kb+nrows) * Zc;i++) { for (i=0;i<(Kb+nrows) * Zc;i++) {
if (esimated_output[i] != channel_input[i]) { if (esimated_output[i] != channel_input[i]) {
...@@ -286,6 +306,12 @@ esimated_output=ldpc_decoder(channel_output_fixed, block_length, No_iteration, r ...@@ -286,6 +306,12 @@ esimated_output=ldpc_decoder(channel_output_fixed, block_length, No_iteration, r
} }
} }
*/
free(c);
free(channel_input);
free(modulated_input);
free(channel_output);
free(channel_output_fixed);
} }
//printf("%d\n",*errors); //printf("%d\n",*errors);
...@@ -294,23 +320,23 @@ esimated_output=ldpc_decoder(channel_output_fixed, block_length, No_iteration, r ...@@ -294,23 +320,23 @@ esimated_output=ldpc_decoder(channel_output_fixed, block_length, No_iteration, r
} }
//#define NTRIALS 10000 //#define NTRIALS 10000
#define NTRIALS 300 #define NTRIALS 30
int main(int argc, char *argv[]) int main(int argc, char *argv[])
{ {
unsigned int errors,crc_misses; unsigned int errors,crc_misses;
unsigned int block_length=1280; unsigned int block_length=22*384;
short No_iteration=25; short No_iteration=25;
double rate=0.2; double rate=0.2;
double SNR,SNR_lin; double SNR,SNR_lin;
unsigned char qbits; unsigned char qbits;
time_stats_t time; //time_stats_t time;
int i=0; int i=0;
opp_enabled=1; //opp_enabled=1;
cpu_freq_GHz = get_cpu_freq_GHz(); // cpu_freq_GHz = get_cpu_freq_GHz();
randominit(0); randominit(0);
//logInit(); //logInit();
...@@ -324,7 +350,7 @@ int main(int argc, char *argv[]) ...@@ -324,7 +350,7 @@ int main(int argc, char *argv[])
unsigned int decoded_errors[100]; // initiate the size of matrix equivalent to unsigned int decoded_errors[100]; // initiate the size of matrix equivalent to
// size of SNR // size of SNR
for (SNR=-3.5; SNR<-2.5; SNR+=.1) { for (SNR=-2.1; SNR<-2; SNR+=.1) {
SNR_lin = pow(10,SNR/10); SNR_lin = pow(10,SNR/10);
...@@ -341,7 +367,7 @@ int main(int argc, char *argv[]) ...@@ -341,7 +367,7 @@ int main(int argc, char *argv[])
&iterations); &iterations);
*/ */
start_meas(&time); // start_meas(&time);
decoded_errors[i]=test_ldpc(No_iteration, decoded_errors[i]=test_ldpc(No_iteration,
rate, rate,
SNR_lin, // noise standard deviation SNR_lin, // noise standard deviation
...@@ -350,9 +376,9 @@ int main(int argc, char *argv[]) ...@@ -350,9 +376,9 @@ int main(int argc, char *argv[])
NTRIALS, NTRIALS,
&errors, &errors,
&crc_misses); &crc_misses);
stop_meas(&time); // stop_meas(&time);
print_meas_now(&time, "", stdout); //print_meas_now(&time, "", stdout);
printf("SNR %f, BLER %f (%d/%d)\n",SNR,(float)decoded_errors[i]/(float)NTRIALS,decoded_errors[i],NTRIALS); printf("SNR %f, BLER %f (%d/%d)\n",SNR,(float)decoded_errors[i]/(float)NTRIALS,decoded_errors[i],NTRIALS);
......
openair1/PHY/CODING/TESTBENCH/ldpctest.c~
View file @ f0e7c3da
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