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bugfix for 4096 and 8192-point dfts.

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This commit is contained in:
Raymond Knopp
2016-09-26 12:08:33 -07:00
parent 3124cb2c00
commit ff90a54ad9
6 changed files with 112 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair1/PHY/LTE_TRANSPORT/prach.c
+39 -13
View File
@@ -46,7 +46,7 @@
#include "SCHED/extern.h"
#include "UTIL/LOG/vcd_signal_dumper.h"
//#define PRACH_DEBUG 1
#define PRACH_DEBUG 1
uint16_t NCS_unrestricted[16] = {0,13,15,18,22,26,32,38,46,59,76,93,119,167,279,419};
uint16_t NCS_restricted[15] = {15,18,22,26,32,38,46,55,68,82,100,128,158,202,237}; // high-speed case
@@ -818,11 +818,14 @@ int32_t generate_prach( PHY_VARS_UE *ue, uint8_t eNB_id, uint8_t subframe, uint1
break;
case 75:
memset((void*)prachF,0,4*19432);
memset((void*)prachF,0,4*18432);
break;
case 100:
memset((void*)prachF,0,4*24576);
if (ue->frame_parms.threequarter_fs == 0)
memset((void*)prachF,0,4*24576);
else
memset((void*)prachF,0,4*18432);
break;
}
@@ -886,6 +889,9 @@ int32_t generate_prach( PHY_VARS_UE *ue, uint8_t eNB_id, uint8_t subframe, uint1
break;
}
if (ue->frame_parms.threequarter_fs == 1)
Ncp=(Ncp*3)>>2;
prach2 = prach+(Ncp<<1);
// do IDFT
@@ -986,21 +992,41 @@ int32_t generate_prach( PHY_VARS_UE *ue, uint8_t eNB_id, uint8_t subframe, uint1
break;
case 100:
if (ue->frame_parms.threequarter_fs == 0) {
if (prach_fmt == 4) {
idft4096(prachF,prach2,1);
memmove( prach, prach+8192, Ncp<<2 );
prach_len = 4096+Ncp;
} else {
idft24576(prachF,prach2);
memmove( prach, prach+49152, Ncp<<2 );
prach_len = 24576+Ncp;
if (prach_fmt>1) {
memmove( prach2+49152, prach2, 98304 );
prach_len = 2* 24576+Ncp;
}
}
}
else {
if (prach_fmt == 4) {
idft4096(prachF,prach2,1);
memmove( prach, prach+8192, Ncp<<2 );
prach_len = 4096+Ncp;
idft3072(prachF,prach2);
//TODO: account for repeated format in dft output
memmove( prach, prach+6144, Ncp<<2 );
prach_len = 3072+Ncp;
} else {
idft24576(prachF,prach2);
memmove( prach, prach+49152, Ncp<<2 );
prach_len = 24576+Ncp;
idft18432(prachF,prach2);
memmove( prach, prach+36864, Ncp<<2 );
prach_len = 18432+Ncp;
if (prach_fmt>1) {
memmove( prach2+49152, prach2, 98304 );
prach_len = 2* 24576+Ncp;
memmove( prach2+36834, prach2, 73728 );
prach_len = 2*18432+Ncp;
}
}
}
break;
}
@@ -1496,7 +1522,7 @@ void rx_prach(PHY_VARS_eNB *eNB,
#ifdef PRACH_DEBUG
if (en>40) {
// if (en>40) {
k = (12*n_ra_prb) - 6*eNB->frame_parms.N_RB_UL;
if (k<0)
@@ -1510,7 +1536,7 @@ void rx_prach(PHY_VARS_eNB *eNB,
write_output("prach_rxF_comp0.m","prach_rxF_comp0",prachF,1024,1,1);
write_output("prach_ifft0.m","prach_t0",prach_ifft[0],1024,1,1);
exit(-1);
}
// }
#endif
} // new dft
openair1/PHY/TOOLS/lte_dfts.c
+55 -13
View File
@@ -5229,7 +5229,7 @@ void dft8192(int16_t *x,int16_t *y,int scale)
xtmpp = xtmp;
for (i=0; i<32; i++) {
for (i=0; i<16; i++) {
transpose4_ooff_simd256(x256 ,xtmpp,512);
transpose4_ooff_simd256(x256+2,xtmpp+1,512);
transpose4_ooff_simd256(x256+4,xtmpp+2,512);
@@ -5267,7 +5267,7 @@ void dft8192(int16_t *x,int16_t *y,int scale)
}
dft4096((int16_t*)(xtmp),(int16_t*)ytmp,1);
dft4096((int16_t*)(xtmp+1024),(int16_t*)(ytmp+512),1);
dft4096((int16_t*)(xtmp+512),(int16_t*)(ytmp+512),1);
for (i=0; i<512; i++) {
@@ -5319,7 +5319,7 @@ void idft8192(int16_t *x,int16_t *y,int scale)
xtmpp = xtmp;
for (i=0; i<32; i++) {
for (i=0; i<16; i++) {
transpose4_ooff_simd256(x256 ,xtmpp,512);
transpose4_ooff_simd256(x256+2,xtmpp+1,512);
transpose4_ooff_simd256(x256+4,xtmpp+2,512);
@@ -5357,7 +5357,7 @@ void idft8192(int16_t *x,int16_t *y,int scale)
}
idft4096((int16_t*)(xtmp),(int16_t*)ytmp,1);
idft4096((int16_t*)(xtmp+1024),(int16_t*)(ytmp+512),1);
idft4096((int16_t*)(xtmp+512),(int16_t*)(ytmp+512),1);
for (i=0; i<512; i++) {
@@ -5733,8 +5733,8 @@ void dft24576(int16_t *input, int16_t *output)
void idft24576(int16_t *input, int16_t *output)
{
int i,i2,j;
uint32_t tmp[3][16384] __attribute__((aligned(32)));
uint32_t tmpo[3][16384] __attribute__((aligned(32)));
uint32_t tmp[3][8192] __attribute__((aligned(32)));
uint32_t tmpo[3][8192] __attribute__((aligned(32)));
for (i=0,j=0; i<8192; i++) {
tmp[0][i] = ((uint32_t *)input)[j++];
@@ -5746,13 +5746,6 @@ void idft24576(int16_t *input, int16_t *output)
idft8192((int16_t*)(tmp[1]),(int16_t*)(tmpo[1]),1);
idft8192((int16_t*)(tmp[2]),(int16_t*)(tmpo[2]),1);
/*
for (i=1; i<8192; i++) {
tmpo[0][i] = tmpo[0][i<<1];
tmpo[1][i] = tmpo[1][i<<1];
tmpo[2][i] = tmpo[2][i<<1];
}*/
/*
write_output("in.m","in",input,24576,1,1);
write_output("out0.m","o0",tmpo[0],8192,1,1);
@@ -19129,6 +19122,55 @@ int main(int argc, char**argv)
write_output("y2048.m","y2048",y,2048,1,1);
write_output("x2048.m","x2048",x,2048,1,1);
memset((void*)x,0,2048*sizeof(int32_t));
for (i=2;i<2402;i++) {
if ((taus() & 1)==0)
((int16_t*)x)[i] = 364;
else
((int16_t*)x)[i] = -364;
}
for (i=2*(4096-1200);i<8192;i++) {
if ((taus() & 1)==0)
((int16_t*)x)[i] = 364;
else
((int16_t*)x)[i] = -364;
}
reset_meas(&ts);
for (i=0; i<10000; i++) {
start_meas(&ts);
idft4096((int16_t *)x,(int16_t *)y,1);
stop_meas(&ts);
}
printf("\n\n4096-point(%f cycles)\n",(double)ts.diff/(double)ts.trials);
write_output("y4096.m","y4096",y,4096,1,1);
write_output("x4096.m","x4096",x,4096,1,1);
memset((void*)x,0,8192*sizeof(int32_t));
for (i=2;i<4802;i++) {
if ((taus() & 1)==0)
((int16_t*)x)[i] = 364;
else
((int16_t*)x)[i] = -364;
}
for (i=2*(4096-1200);i<8192;i++) {
if ((taus() & 1)==0)
((int16_t*)x)[i] = 364;
else
((int16_t*)x)[i] = -364;
}
reset_meas(&ts);
for (i=0; i<10000; i++) {
start_meas(&ts);
idft8192((int16_t *)x,(int16_t *)y,1);
stop_meas(&ts);
}
printf("\n\n8192-point(%f cycles)\n",(double)ts.diff/(double)ts.trials);
write_output("y8192.m","y8192",y,8192,1,1);
write_output("x8192.m","x8192",x,8192,1,1);
return(0);
}
openair1/PHY/TOOLS/twiddle12288.h
+2 -2
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File diff suppressed because one or more lines are too long
openair1/PHY/TOOLS/twiddle24576.h
+2 -2
View File
File diff suppressed because one or more lines are too long
openair1/PHY/TOOLS/twiddle6144.h
+2 -2
View File
File diff suppressed because one or more lines are too long
openair1/SIMULATION/LTE_PHY/prachsim.c
+12 -5
View File
@@ -104,13 +104,15 @@ int main(int argc, char **argv)
double delay_avg=0;
double ue_speed = 0;
int NCS_config = 1,rootSequenceIndex=0;
int threequarter_fs = 0;
logInit();
number_of_cards = 1;
while ((c = getopt (argc, argv, "hHaA:Cr:p:g:n:s:S:t:x:y:v:V:z:N:F:d:Z:L:R:")) != -1) {
while ((c = getopt (argc, argv, "hHaA:Cr:p:g:n:s:S:t:x:y:v:V:z:N:F:d:Z:L:R:E")) != -1) {
switch (c) {
case 'a':
printf("Running AWGN simulation\n");
@@ -182,6 +184,10 @@ int main(int argc, char **argv)
break;
case 'E':
threequarter_fs=1;
break;
case 'n':
n_frames = atoi(optarg);
break;
@@ -316,7 +322,7 @@ int main(int argc, char **argv)
Nid_cell,
3,
N_RB_DL,
0,
threequarter_fs,
osf,
0);
@@ -395,8 +401,9 @@ int main(int argc, char **argv)
eNB->frame_parms.prach_config_common.prach_ConfigInfo.highSpeedFlag=hs_flag;
eNB->frame_parms.prach_config_common.prach_ConfigInfo.prach_FreqOffset=0;
eNB->node_function = eNodeB_3GPP;
eNB->proc.subframe_rx = subframe;
eNB->node_function = eNodeB_3GPP;
eNB->proc.subframe_rx = subframe;
eNB->proc.subframe_prach = subframe;
/* N_ZC not used later, so prach_fmt is also useless, don't set */
//prach_fmt = get_prach_fmt(eNB->frame_parms.prach_config_common.prach_ConfigInfo.prach_ConfigIndex,
@@ -530,7 +537,7 @@ int main(int argc, char **argv)
write_output("rxsig0.m","rxs0",
&eNB->common_vars.rxdata[0][0][subframe*frame_parms->samples_per_tti],
frame_parms->samples_per_tti,1,1);
write_output("rxsigF0.m","rxsF0", &eNB->common_vars.rxdataF[0][0][0],512*nsymb*2,2,1);
write_output("rxsigF0.m","rxsF0", eNB->prach_vars.rxsigF[0],6144,1,1);
write_output("prach_preamble.m","prachp",&eNB->X_u[0],839,1,1);
}
}