PentHertz
/
srsLTE
mirror of https://github.com/PentHertz/srsLTE.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

TA estimate correction factor calibrated for all bandwidths

This commit is contained in:
Ismael Gomez 2018-09-24 15:39:14 +02:00
parent 13cba873d5
commit 6f0c554445
3 changed files with 12 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
lib/src/phy/phch/prach.c
View File

@ -654,7 +654,15 @@ int srslte_prach_detect_offset(srslte_prach_t *p,
peak_to_avg[*n_indices] = p->peak_values[j] / corr_ave; peak_to_avg[*n_indices] = p->peak_values[j] / corr_ave;
} }
if (t_offsets) { if (t_offsets) {
t_offsets[*n_indices] = (float) p->peak_offsets[j] * p->T_seq / p->N_zc; float corr = 1.8;
if (p->peak_offsets[j] > 30) {
corr = 1.9;
}
if (p->peak_offsets[j] > 250) {
corr = 1.91;
}
t_offsets[*n_indices] = corr*p->peak_offsets[j]/(DELTA_F_RA * p->N_zc);
} }
(*n_indices)++; (*n_indices)++;
} }

2
srsenb/src/mac/mac.cc
View File

@ -489,7 +489,7 @@ int mac::rach_detected(uint32_t tti, uint32_t preamble_idx, uint32_t time_adv)
// Save RA info // Save RA info
pending_rars[ra_id].preamble_idx = preamble_idx; pending_rars[ra_id].preamble_idx = preamble_idx;
pending_rars[ra_id].ta_cmd = 2*time_adv; pending_rars[ra_id].ta_cmd = time_adv;
pending_rars[ra_id].temp_crnti = last_rnti; pending_rars[ra_id].temp_crnti = last_rnti;
// Add new user to the scheduler so that it can RX/TX SRB0 // Add new user to the scheduler so that it can RX/TX SRB0

4
srsue/src/phy/prach.cc
View File

@ -191,8 +191,8 @@ cf_t *prach::generate(float cfo, uint32_t *nof_sf, float *target_power) {
*target_power = target_power_dbm; *target_power = target_power_dbm;
} }
Info("PRACH: Transmitted preamble=%d, CFO=%.2f KHz, nof_sf=%d, target_power=%.1f dBm\n", Info("PRACH: Transmitted preamble=%d, tti=%d, CFO=%.2f KHz, nof_sf=%d, target_power=%.1f dBm\n",
preamble_idx, cfo*15, nsf, target_power_dbm); preamble_idx, transmitted_tti, cfo*15, nsf, target_power_dbm);
preamble_idx = -1; preamble_idx = -1;
return signal_buffer; return signal_buffer;