Added: command-line options for time drift and frequency offset simulations in RfSimulator

executables/nr-softmodem-common.h

@@ -115,6 +115,11 @@
 #define CONFIG_HLP_UEK2          "Set the additional k2 for NTN at UE\n"
 #define CONFIG_HLP_GNBK2         "Set the additional k2 for NTN at gNB\n"
 #define CONFIG_HLP_ULSCHEDF      "Set the maximum number of buffered UL scheduled frames at gNB\n"
+#define CONFIG_HLP_FDoppler      "Set the maximum Doppler frequency shift\n"
+#define CONFIG_HLP_FDopplerComp  "Execute continous frequency offset compensation\n"
+#define CONFIG_HLP_TDRIFT        "Set the timing offset/drift per frame in the RF simulator (expressed in number of samples per frame)\n"
+#define CONFIG_HLP_FDopplerRate  "Set the Doppler rate in Hz/s\n"
+#define CONFIG_HLP_FDopplerVar   "Set Doppler variance, [fdoppler +/- fdopplerVar]\n"
 /*--------------------------------------------------------------------------------------------------------------------------------*/
 /*                                            command line parameters for LOG utility                                             */
 /*   optname         helpstr          paramflags          XXXptr                     defXXXval            type           numelt   */
@@ -164,5 +169,10 @@ extern uint16_t NTN_UE_slot_Rx_to_Tx; //the additional Rx to Tx slot number at U
 extern uint16_t NTN_UE_k2; //the additional k2 value at UE
 extern uint16_t NTN_gNB_k2; //the additional k2 value at gNB
 extern uint16_t max_ul_sched_frame; //Set the maximum number of buffered UL scheduled frames at gNB, for UL_tti_req_ahead and vrb_map_UL
+extern int fdoppler;             //maximum Doppler frequency shift in Hz
+extern int fdopplerComp;         // flag to activate/deactivate continous frequency offset compensation
+extern int RFsim_DriftPerFrame; //the timing offset/drift per frame in the RF simulator (expressed in number of samples per frame)
+extern int32_t fdopplerRate; //Doppler rate in Hz/s
+extern uint32_t fdopplerVar; //Doppler variance, [fdoppler +/- fdopplerVar]
 
 #endif

executables/nr-softmodem.c

@@ -571,6 +571,11 @@ void init_pdcp(void) {
 uint64_t RFsim_PropDelay = 0;
 uint16_t NTN_gNB_k2 = 0;
 uint16_t max_ul_sched_frame = 1;
+int fdoppler = 0;
+int fdopplerComp = 1;
+int RFsim_DriftPerFrame = 0;
+int32_t fdopplerRate;
+uint32_t fdopplerVar;
 
 int main( int argc, char **argv ) {
   int ru_id, CC_id = 0;

executables/nr-softmodem.h

@@ -35,6 +35,10 @@
   {"P" ,                    CONFIG_HLP_PROPD,          0,                .u64ptr=&RFsim_PropDelay,            .defintval=0,                     TYPE_UINT64, 0},        \
   {"gnb_k2" ,               CONFIG_HLP_GNBK2,          0,                .u16ptr=&NTN_gNB_k2,                 .defintval=0,                     TYPE_UINT16, 0},        \
   {"ul_sched_f" ,           CONFIG_HLP_ULSCHEDF,       0,                .u16ptr=&max_ul_sched_frame,         .defintval=1,                     TYPE_UINT16, 0},        \
+  {"FD" ,                   CONFIG_HLP_FDoppler,       0,                .iptr=&fdoppler,                     .defintval=0,                     TYPE_INT,    0},        \
+  {"TD" ,                   CONFIG_HLP_TDRIFT,         0,                .iptr=&RFsim_DriftPerFrame,          .defintval=0,                     TYPE_INT,    0},        \
+  {"DSR" ,                  CONFIG_HLP_FDopplerRate,   0,                .iptr=&fdopplerRate,                 .defintval=0,                     TYPE_INT32,  0},        \
+  {"DSV" ,                  CONFIG_HLP_FDopplerVar,    0,                .uptr=&fdopplerVar,                  .defintval=0,                     TYPE_UINT32, 0},        \
 }
 // clang-format on
 

executables/nr-uesoftmodem.c

@@ -427,6 +427,12 @@ int NB_UE_INST = 1;
 uint64_t RFsim_PropDelay = 0;
 uint16_t NTN_UE_k2 = 0;
 uint16_t NTN_UE_slot_Rx_to_Tx = 0;
+int RFsim_DriftPerFrame = 0;
+int32_t fdoppler = 0; //center Doppler frequency shift
+int32_t fdopplerRate; //Doppler rate in Hz/s
+uint32_t fdopplerVar; //Doppler variance, [fdoppler +/- fdopplerVar]
+int fdopplerComp = 1; // flag to activate continous frequency offset compensation (=0 deacticated, =1 activated (default case))
+
 
 int main( int argc, char **argv ) {
   int set_exe_prio = 1;

executables/nr-uesoftmodem.h

@@ -66,6 +66,11 @@
   {"P" ,                           CONFIG_HLP_PROPD,           0,               .u64ptr=&RFsim_PropDelay,                    .defintval=0,      TYPE_UINT64,   0}, \
   {"ue_slot_Rx_Tx" ,               CONFIG_HLP_UESLOTRXTX,      0,               .u16ptr=&NTN_UE_slot_Rx_to_Tx,               .defintval=0,      TYPE_UINT16,   0}, \
   {"ue_k2" ,                       CONFIG_HLP_UEK2,            0,               .u16ptr=&NTN_UE_k2,                          .defintval=0,      TYPE_UINT16,   0}, \
+  {"FD" ,                          CONFIG_HLP_FDoppler,    0,                   .iptr=&fdoppler,                             .defintval=0,      TYPE_INT,      0}, \
+  {"FC" ,                          CONFIG_HLP_FDopplerComp,    0,               .iptr=&fdopplerComp,                         .defintval=1,      TYPE_INT,      0}, \
+  {"D" ,                           CONFIG_HLP_TDRIFT,      0,                   .iptr=&RFsim_DriftPerFrame,                  .defintval=0,      TYPE_INT,      0}, \
+  {"DSR" ,                         CONFIG_HLP_FDopplerRate,0,                   .iptr=&fdopplerRate,                         .defintval=0,      TYPE_INT32,    0}, \
+  {"DSV" ,                         CONFIG_HLP_FDopplerVar, 0,                   .uptr=&fdopplerVar,                          .defintval=0,      TYPE_UINT32,   0}, \
 }
 // clang-format on