Decreased ue_sync tracking threshold

lte/phy/include/liblte/phy/fec/viterbi.h

@@ -45,6 +45,7 @@ typedef struct LIBLTE_API{
   float gain_quant; 
   uint32_t poly[3];
   int (*decode) (void*, uint8_t*, uint8_t*, uint32_t);
+  int (*decode_f) (void*, float*, uint8_t*, uint32_t);
   void (*free) (void*);
   uint8_t *tmp;
   uint8_t *symbols_uc;

lte/phy/lib/fec/src/viterbi.c

@@ -96,6 +96,7 @@ int decode39(void *o, uint8_t *symbols, uint8_t *data, uint32_t frame_length) {
   return q->framebits;
 }
 
+
 void free37(void *o) {
   viterbi_t *q = o;
   if (q->symbols_uc) {
@@ -123,6 +124,7 @@ int init37(viterbi_t *q, uint32_t poly[3], uint32_t framebits, bool tail_biting)
   q->tail_biting = tail_biting;
   q->decode = decode37;
   q->free = free37;
+  q->decode_f = NULL;
   q->symbols_uc = malloc(3 * (q->framebits + q->K - 1) * sizeof(uint8_t));
   if (!q->symbols_uc) {
     perror("malloc");
@@ -145,7 +147,7 @@ int init37(viterbi_t *q, uint32_t poly[3], uint32_t framebits, bool tail_biting)
     return -1;
   } else {
     return 0;
-  }
+  }     
 }
 
 int init39(viterbi_t *q, uint32_t poly[3], uint32_t framebits, bool tail_biting) {
@@ -156,6 +158,7 @@ int init39(viterbi_t *q, uint32_t poly[3], uint32_t framebits, bool tail_biting)
   q->gain_quant = 32; 
   q->decode = decode39;
   q->free = free39;
+  q->decode_f = NULL;
   if (q->tail_biting) {
     fprintf(stderr,
         "Error: Tailbitting not supported in 1/3 K=9 decoder\n");
@@ -175,6 +178,8 @@ int init39(viterbi_t *q, uint32_t poly[3], uint32_t framebits, bool tail_biting)
   }
 }
 
+
+
 void viterbi_set_gain_quant(viterbi_t *q, float gain_quant) {
   q->gain_quant = gain_quant;
 }
@@ -212,8 +217,14 @@ int viterbi_decode_f(viterbi_t *q, float *symbols, uint8_t *data, uint32_t frame
   } else {
     len = 3 * (frame_length + q->K - 1);
   }
-  vec_quant_fuc(symbols, q->symbols_uc, q->gain_quant, 127.5, 255, len);
-  return q->decode(q, q->symbols_uc, data, frame_length);
+  if (!q->decode_f) {
+    vec_quant_fuc(symbols, q->symbols_uc, q->gain_quant, 127.5, 255, len);
+    return q->decode(q, q->symbols_uc, data, frame_length);    
+  } else {
+    return q->decode_f(q, symbols, data, frame_length);
+  }
+  
+  
 }
 
 int viterbi_decode_uc(viterbi_t *q, uint8_t *symbols, uint8_t *data,

lte/phy/lib/ue/src/ue_sync.c

@@ -119,7 +119,7 @@ int ue_sync_init(ue_sync_t *q,
       sync_set_em_alpha(&q->sfind, 1);
       q->nof_avg_find_frames = 1; 
       sync_set_threshold(&q->sfind, 2.0);
-      sync_set_threshold(&q->strack, 6.0);
+      sync_set_threshold(&q->strack, 1.4);
 
       /* Correct CFO in the find state but not in the track state, since is called only 
        * 1 every 5 subframes. Will do it in the ue_sync_get_buffer() function.