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NR UE: add PI controller to continuous frequency offset compensation

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This commit is contained in:
Thomas Schlichter
2025-04-10 13:56:20 +00:00
parent 84712f5f92
commit 18469302d8
4 changed files with 15 additions and 2 deletions
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executables/nr-uesoftmodem.h
+6
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@@ -15,6 +15,8 @@
#define CONFIG_HLP_NTN_INIT_TIME_DRIFT "Initial NTN DL time drift (feeder link and service link), given in µs/s\n"
#define CONFIG_HLP_AUTONOMOUS_TA "Autonomously update TA based on DL drift (useful if main contribution to DL drift is movement, e.g. LEO satellite)\n"
#define CONFIG_HLP_INITIAL_FO "Initially compensated DL frequency offset (e.g. known Doppler shift in NTN LEO scenario)\n"
#define CONFIG_HLP_FREQ_SYNC_P "coefficient for Proportional part of continuous frequency offset compensation PI controller\n"
#define CONFIG_HLP_FREQ_SYNC_I "coefficient for Integrating part of continuous frequency offset compensation PI controller\n"
#define CONFIG_HLP_CONT_FO_COMP "Enable continuous frequency offset (FO) estimation and compensation and specify main FO source (1 = local oscillator, 2 = Doppler shift)\n"
#define CONFIG_HLP_AGC "Rx Gain control used for UE\n"
@@ -68,6 +70,8 @@
{"ntn-initial-time-drift", CONFIG_HLP_NTN_INIT_TIME_DRIFT, 0, .dblptr=&(nrUE_params.ntn_init_time_drift), .defdblval=0.0, TYPE_DOUBLE, 0}, \
{"autonomous-ta", CONFIG_HLP_AUTONOMOUS_TA, PARAMFLAG_BOOL, .iptr=&(nrUE_params.autonomous_ta), .defintval=0, TYPE_INT, 0}, \
{"initial-fo", CONFIG_HLP_INITIAL_FO, 0, .dblptr=&(nrUE_params.initial_fo), .defdblval=0.0, TYPE_DOUBLE, 0}, \
{"freq-sync-P", CONFIG_HLP_FREQ_SYNC_P, 0, .dblptr=&(nrUE_params.freq_sync_P), .defdblval=0.01, TYPE_DOUBLE, 0}, \
{"freq-sync-I", CONFIG_HLP_FREQ_SYNC_I, 0, .dblptr=&(nrUE_params.freq_sync_I), .defdblval=0.001, TYPE_DOUBLE, 0}, \
{"cont-fo-comp", CONFIG_HLP_CONT_FO_COMP, 0, .iptr=&(nrUE_params.cont_fo_comp), .defintval=0, TYPE_INT, 0}, \
{"agc", CONFIG_HLP_AGC, PARAMFLAG_BOOL, .iptr=&(nrUE_params.agc), .defintval=0, TYPE_INT, 0}, \
}
@@ -94,6 +98,8 @@ typedef struct {
double ntn_init_time_drift;
int autonomous_ta;
double initial_fo;
double freq_sync_P;
double freq_sync_I;
int cont_fo_comp;
int agc;
char *usrp_args;