SRSENB: hard-coded parametrized PUCCH DMRS correlation threshold

lib/include/srslte/phy/phch/pucch.h

@@ -56,6 +56,7 @@
 #define SRSLTE_PUCCH_DEFAULT_THRESHOLD_FORMAT1 (0.2f)
 #define SRSLTE_PUCCH_DEFAULT_THRESHOLD_FORMAT1A (0.2f)
 #define SRSLTE_PUCCH_DEFAULT_THRESHOLD_FORMAT2 (0.2f)
+#define SRSLTE_PUCCH_DEFAULT_THRESHOLD_DMRS (0.2f)
 
 typedef struct {
   srslte_sequence_t seq_f2[SRSLTE_NOF_SF_X_FRAME];

lib/include/srslte/phy/phch/pucch_cfg.h

@@ -75,6 +75,7 @@ typedef struct SRSLTE_API {
   float threshold_format1;
   float threshold_data_valid_format1a;
   float threshold_data_valid_format2;
+  float threshold_dmrs_detection;
 
   // PUCCH configuration generated during a call to encode/decode
   srslte_pucch_format_t format;

lib/src/phy/phch/pucch.c

@@ -918,8 +918,8 @@ int srslte_pucch_decode(srslte_pucch_t*        q,
     float _pow       = srslte_vec_avg_power_cf(q->ce, nof_re);
     float _r         = _rms / _pow;
 
-    // Return not detected if the ratio is 0, NAN, +/- Infinity or below 0.1
+    // Return not detected if the ratio is 0, NAN, +/- Infinity or below threshold
-    if (!isnormal(_r) || _r < 0.1f) {
+    if (!isnormal(_r) || _r < cfg->threshold_dmrs_detection) {
       data->detected    = false;
       data->correlation = NAN;
       return SRSLTE_SUCCESS;

srsenb/src/phy/phy_ue_db.cc

@@ -106,6 +106,7 @@ inline void phy_ue_db::_set_common_config_rnti(uint16_t rnti)
     scell_info.phy_cfg.ul_cfg.pucch.threshold_format1             = SRSLTE_PUCCH_DEFAULT_THRESHOLD_FORMAT1;
     scell_info.phy_cfg.ul_cfg.pucch.threshold_data_valid_format1a = SRSLTE_PUCCH_DEFAULT_THRESHOLD_FORMAT1A;
     scell_info.phy_cfg.ul_cfg.pucch.threshold_data_valid_format2  = SRSLTE_PUCCH_DEFAULT_THRESHOLD_FORMAT2;
+    scell_info.phy_cfg.ul_cfg.pucch.threshold_dmrs_detection      = SRSLTE_PUCCH_DEFAULT_THRESHOLD_DMRS;
   }
 }