do not put random bits in DCI, put 0 instead (to avoid false DCI detections)

openair1/PHY/LTE_TRANSPORT/dci.c

@@ -2257,11 +2257,18 @@ uint8_t generate_dci_top(uint8_t num_pdcch_symbols,
   y[0] = &yseq0[0];
   y[1] = &yseq1[0];
 
+#if 0
   // reset all bits to <NIL>, here we set <NIL> elements as 2
   // memset(e, 2, DCI_BITS_MAX);
   // here we interpret NIL as a random QPSK sequence. That makes power estimation easier.
   for (i=0; i<DCI_BITS_MAX; i++)
     e[i]=taus()&1;
+#endif
+
+  /* clear all bits, the above code may generate too much false detections
+   * (not sure about this, to be checked somehow)
+   */
+  memset(e, 0, DCI_BITS_MAX);
 
   e_ptr = e;