Fixed BCCH encoding bug

lte/examples/pdsch_enodeb.c

@@ -55,7 +55,7 @@ uint32_t mcs_idx = 12;
 int nof_frames = -1;
 
 char *uhd_args = "";
-float uhd_amp = 0.01, uhd_gain = 10.0, uhd_freq = 2400000000;
+float uhd_amp = 0.1, uhd_gain = 40.0, uhd_freq = 2400000000;
 
 filesink_t fsink;
 lte_fft_t ifft;
@@ -325,6 +325,9 @@ int main(int argc, char **argv) {
     exit(-1);
   }
   
+  bcch_bch_pack(&cell, 0, bch_payload_packed, BCH_PAYLOAD_LEN/8);
+  bit_pack_vector(bch_payload_packed, bch_payload, BCH_PAYLOAD_LEN);
+
   while (nf < nof_frames || nof_frames == -1) {
     for (sf_idx = 0; sf_idx < NSUBFRAMES_X_FRAME && (nf < nof_frames || nof_frames == -1); sf_idx++) {
       bzero(sf_buffer, sizeof(cf_t) * sf_n_re);
@@ -336,7 +339,6 @@ int main(int argc, char **argv) {
       }
       
       bcch_bch_pack(&cell, sfn, bch_payload_packed, BCH_PAYLOAD_LEN/8);
-      bit_pack_vector(bch_payload_packed, bch_payload, BCH_PAYLOAD_LEN);
       if (sf_idx == 0) {
         pbch_encode(&pbch, bch_payload, sf_symbols);
       }

lte/rrc/lib/messages/src/bcch.c

@@ -85,6 +85,7 @@ int bcch_bch_pack(lte_cell_t *cell, uint32_t sfn, uint8_t *buffer, uint32_t buff
   sfn=(sfn>>2);
   req.systemFrameNumber.buf = (uint8_t*) &sfn;
   req.systemFrameNumber.size = 1;
+  req.systemFrameNumber.bits_unused= 0;
   int spare = 0;
   req.spare.buf = (uint8_t*) &spare;
   req.spare.size = 2;
@@ -96,7 +97,7 @@ int bcch_bch_pack(lte_cell_t *cell, uint32_t sfn, uint8_t *buffer, uint32_t buff
     printf("Failed to encode element %s\n", n.failed_type ? n.failed_type->name : "");
     return LIBLTE_ERROR;
   } 
-  asn_fprint(stdout, &asn_DEF_MasterInformationBlock, &req); 
+
   return LIBLTE_SUCCESS;
 }