Fixed ULSCH CQI receiver

srslte/include/srslte/phch/pdsch.h

@@ -95,6 +95,11 @@ SRSLTE_API int srslte_pdsch_set_rnti_multi(srslte_pdsch_t *q,
 SRSLTE_API uint16_t srslte_pdsch_get_rnti_multi(srslte_pdsch_t *q, 
                                                 uint32_t idx);
 
+SRSLTE_API float srslte_pdsch_coderate(uint32_t tbs, 
+                                       uint32_t nof_re); 
+
+SRSLTE_API void print_pdsch_coderate(); 
+
 SRSLTE_API int srslte_pdsch_cfg(srslte_pdsch_cfg_t *cfg, 
                                 srslte_cell_t cell, 
                                 srslte_ra_dl_grant_t *grant, 

srslte/include/srslte/utils/vector.h

@@ -156,6 +156,7 @@ SRSLTE_API float srslte_vec_avg_power_cf(cf_t *x, uint32_t len);
 SRSLTE_API uint32_t srslte_vec_max_fi(float *x, uint32_t len);
 SRSLTE_API uint32_t srslte_vec_max_abs_ci(cf_t *x, uint32_t len);
 SRSLTE_API int16_t srslte_vec_max_star_si(int16_t *x, uint32_t len);
+SRSLTE_API int16_t srslte_vec_max_abs_star_si(int16_t *x, uint32_t len);
 
 /* maximum between two vectors */
 SRSLTE_API void srslte_vec_max_fff(float *x, float *y, float *z, uint32_t len);

srslte/lib/phch/pdsch.c

@@ -57,6 +57,10 @@ extern int indices[100000];
 extern int indices_ptr; 
 #endif
 
+float srslte_pdsch_coderate(uint32_t tbs, uint32_t nof_re) 
+{
+  return (float) (tbs + 24)/(nof_re);
+}
 
 int srslte_pdsch_cp(srslte_pdsch_t *q, cf_t *input, cf_t *output, srslte_ra_dl_grant_t *grant, uint32_t lstart_grant, uint32_t nsubframe, bool put) 
 {

srslte/lib/phch/sch.c

@@ -646,16 +646,10 @@ int srslte_ulsch_uci_decode(srslte_sch_t *q, srslte_pusch_cfg_t *cfg, srslte_sof
   
   // Decode CQI (multiplexed at the front of ULSCH)
   if (uci_data->uci_cqi_len > 0) {
-    struct timeval t[3];
-    gettimeofday(&t[1], NULL);
     ret = srslte_uci_decode_cqi_pusch(&q->uci_cqi, cfg, g_bits, 
                                       beta_cqi_offset[cfg->uci_cfg.I_offset_cqi], 
                                       Q_prime_ri, uci_data->uci_cqi_len,
                                       uci_data->uci_cqi, &uci_data->cqi_ack);
-    gettimeofday(&t[2], NULL);
-    get_time_interval(t);
-    printf("texec=%d us\n", t[0].tv_usec);
-    
     if (ret < 0) {
       return ret; 
     }

srslte/lib/phch/uci.c

@@ -298,8 +298,8 @@ int decode_cqi_long(srslte_uci_cqi_pusch_t *q, int16_t *q_bits, uint32_t Q,
     srslte_rm_conv_rx_s(q_bits, Q, q->encoded_cqi_s, 3 * (nof_bits + 8));
 
     // Set viterbi normalization based on amplitude
-    int16_t max = srslte_vec_max_star_si(q->encoded_cqi_s, 3 * (nof_bits + 8));
-    srslte_viterbi_set_gain_quant_s(&q->viterbi, max/36); 
+    int16_t max = srslte_vec_max_abs_star_si(q->encoded_cqi_s, 3 * (nof_bits + 8));
+    srslte_viterbi_set_gain_quant_s(&q->viterbi, (float) abs(max)/36); 
 
     DEBUG("cconv_rx=", 0);
     if (SRSLTE_VERBOSE_ISDEBUG()) {

srslte/lib/utils/vector.c

@@ -729,6 +729,17 @@ int16_t srslte_vec_max_star_si(int16_t *x, uint32_t len) {
 #endif
 }
 
+int16_t srslte_vec_max_abs_star_si(int16_t *x, uint32_t len) {
+  uint32_t i;
+  int16_t m=-INT16_MIN;
+  for (i=0;i<len;i++) {
+    if (abs(x[i])>m) {
+      m=abs(x[i]);
+    }
+  }
+  return m;
+}
+
 void srslte_vec_max_fff(float *x, float *y, float *z, uint32_t len) {
 #ifdef HAVE_VOLK_MAX_VEC_FUNCTION
   volk_32f_x2_max_32f(z,x,y,len);