New algorithm for QPSK demodulation. Added Turbodecoder precomputation of permutation tables. Added LUT for DCI size calculation. Using Volk for descrambling.

cmake/modules/FindVolk.cmake

@@ -34,6 +34,7 @@ CHECK_FUNCTION_EXISTS_MATH(volk_32fc_x2_multiply_32fc HAVE_VOLK_MULT2_FUNCTION)
 CHECK_FUNCTION_EXISTS_MATH(volk_32fc_x2_multiply_conjugate_32fc HAVE_VOLK_MULT2_CONJ_FUNCTION)
 CHECK_FUNCTION_EXISTS_MATH(volk_32fc_32f_multiply_32fc HAVE_VOLK_MULT_REAL_FUNCTION)
 CHECK_FUNCTION_EXISTS_MATH(volk_32f_s32f_multiply_32f HAVE_VOLK_MULT_FLOAT_FUNCTION)
+CHECK_FUNCTION_EXISTS_MATH(volk_32f_x2_multiply_32f HAVE_VOLK_MULT_REAL2_FUNCTION)
 CHECK_FUNCTION_EXISTS_MATH(volk_32fc_magnitude_32f HAVE_VOLK_MAG_FUNCTION)
 CHECK_FUNCTION_EXISTS_MATH(volk_32f_x2_divide_32f HAVE_VOLK_DIVIDE_FUNCTION)
 CHECK_FUNCTION_EXISTS_MATH(volk_32fc_32f_dot_prod_32fc HAVE_VOLK_DOTPROD_FC_FUNCTION)
@@ -78,6 +79,7 @@ IF(VOLK_FOUND)
   CHECK_FUNCTION_EXISTS_MATH(volk_32fc_x2_square_dist_32f HAVE_VOLK_SQUARE_DIST_FUNCTION)
   CHECK_FUNCTION_EXISTS_MATH(volk_32fc_deinterleave_real_32f HAVE_VOLK_DEINTERLEAVE_FUNCTION)
   CHECK_FUNCTION_EXISTS_MATH(volk_32fc_index_max_16u HAVE_VOLK_MAX_ABS_FUNCTION)
+  CHECK_FUNCTION_EXISTS_MATH(volk_32f_x2_multiply_32f HAVE_VOLK_MULT_REAL2_FUNCTION)
 
 
 

matlab/tests/pdcch_bler.m

@@ -1,3 +1,4 @@
+
 %% PDCCH Blind Search and DCI Decoding + PCFICH encoding/decoding
 
 %% Cell-Wide Settings

matlab/tests/pusch_test.m

@@ -14,7 +14,7 @@ for p=1:ueConfig.NULRB
                 for bri=1:length(betas)
                     for back=1:length(betas)          
                         for c=1:length(cqilen)
-                            for s=0
+                            for s=0:9
                                 ueConfig.NSubframe=s;
                                 puschConfig.PRBSet=(0:p-1)';
 

srslte/include/srslte/common/sequence.h

@@ -43,6 +43,7 @@
 typedef struct SRSLTE_API {
   uint8_t *c;
   uint8_t *c_bytes;
+  float *c_float;
   uint32_t len;
 } srslte_sequence_t;
 

srslte/include/srslte/fec/turbocoder.h

@@ -51,7 +51,6 @@
 typedef struct SRSLTE_API {
   uint32_t max_long_cb;
   uint8_t *temp;
-  srslte_tc_interl_t interl;
 } srslte_tcod_t;
 
 

srslte/include/srslte/fec/turbodecoder.h

@@ -42,6 +42,7 @@
 
 #include "srslte/config.h"
 #include "srslte/fec/tc_interl.h"
+#include "srslte/fec/cbsegm.h"
 
 #define SRSLTE_TCOD_RATE 3
 #define SRSLTE_TCOD_TOTALTAIL 12
@@ -67,7 +68,8 @@ typedef struct SRSLTE_API {
   srslte_llr_t *syst;
   srslte_llr_t *parity;
 
-  srslte_tc_interl_t interleaver;
+  int current_cbidx; 
+  srslte_tc_interl_t interleaver[SRSLTE_NOF_TC_CB_SIZES];
 } srslte_tdec_t;
 
 SRSLTE_API int srslte_tdec_init(srslte_tdec_t * h, 

srslte/include/srslte/phch/dci.h

@@ -49,7 +49,7 @@
 #define SRSLTE_RAR_GRANT_LEN 20
 
 typedef enum {
-  SRSLTE_DCI_FORMAT0, 
+  SRSLTE_DCI_FORMAT0 = 0, 
   SRSLTE_DCI_FORMAT1, 
   SRSLTE_DCI_FORMAT1A, 
   SRSLTE_DCI_FORMAT1C, 
@@ -161,4 +161,7 @@ SRSLTE_API int srslte_dci_msg_unpack_pdsch(srslte_dci_msg_t *msg,
 SRSLTE_API uint32_t srslte_dci_format_sizeof(srslte_dci_format_t format, 
                                              uint32_t nof_prb);
 
+SRSLTE_API uint32_t srslte_dci_format_sizeof_lut(srslte_dci_format_t format, 
+                                                 uint32_t nof_prb);
+
 #endif // DCI_

srslte/include/srslte/utils/debug.h

@@ -46,7 +46,7 @@
 #include <sys/time.h>
 SRSLTE_API void get_time_interval(struct timeval * tdata);
 
-#ifndef SRSLTE_DEBUG_DISABLED
+#define SRSLTE_DEBUG_ENABLED 0
 
 SRSLTE_API extern int srslte_verbose;
 
@@ -58,17 +58,11 @@ SRSLTE_API extern int srslte_verbose;
 #define PRINT_INFO srslte_verbose=SRSLTE_VERBOSE_INFO
 #define PRINT_NONE srslte_verbose=SRSLTE_VERBOSE_NONE
 
-#define DEBUG(_fmt, ...) if (srslte_verbose >= SRSLTE_VERBOSE_DEBUG) \
+#define DEBUG(_fmt, ...) if (SRSLTE_DEBUG_ENABLED && srslte_verbose >= SRSLTE_VERBOSE_DEBUG) \
   fprintf(stdout, "[DEBUG]: " _fmt, __VA_ARGS__)
 
-#define INFO(_fmt, ...) if (srslte_verbose >= SRSLTE_VERBOSE_INFO) \
+#define INFO(_fmt, ...) if (SRSLTE_DEBUG_ENABLED && srslte_verbose >= SRSLTE_VERBOSE_INFO) \
   fprintf(stdout, "[INFO]:  " _fmt, __VA_ARGS__)
 
-#else // SRSLTE_DEBUG_DISABLED
-
-#define DEBUG
-#define INFO
-
-#endif // SRSLTE_DEBUG_DISABLED
 
 #endif // DEBUG_H

srslte/include/srslte/utils/vector.h

@@ -119,6 +119,9 @@ SRSLTE_API void srslte_vec_prod_cfc(cf_t *x, float *y, cf_t *z, uint32_t len);
 /* conjugate vector product (element-wise) */
 SRSLTE_API void srslte_vec_prod_conj_ccc(cf_t *x, cf_t *y, cf_t *z, uint32_t len);
 
+/* real vector product (element-wise) */
+SRSLTE_API void srslte_vec_prod_fff(float *x, float *y, float *z, uint32_t len);
+
 /* Dot-product */
 SRSLTE_API cf_t srslte_vec_dot_prod_cfc(cf_t *x, float *y, uint32_t len);
 SRSLTE_API cf_t srslte_vec_dot_prod_ccc(cf_t *x, cf_t *y, uint32_t len);

srslte/lib/common/src/sequence.c

@@ -83,6 +83,9 @@ int srslte_sequence_LTE_pr(srslte_sequence_t *q, uint32_t len, uint32_t seed) {
   q->len = len;
   srslte_sequence_set_LTE_pr(q, seed);
   srslte_bit_pack_vector(q->c, q->c_bytes, len);
+  for (int i=0;i<len;i++) {
+    q->c_float[i] = (1-2*q->c[i]);
+  }
   return SRSLTE_SUCCESS;
 }
 
@@ -92,6 +95,9 @@ int srslte_sequence_init(srslte_sequence_t *q, uint32_t len) {
     if (q->c_bytes) {
       free(q->c_bytes);
     }
+    if (q->c_float) {
+      free(q->c_float);
+    }
   }
   if (!q->c) {
     q->c = srslte_vec_malloc(len * sizeof(uint8_t));
@@ -102,6 +108,10 @@ int srslte_sequence_init(srslte_sequence_t *q, uint32_t len) {
     if (!q->c_bytes) {
       return SRSLTE_ERROR;
     }
+    q->c_float = srslte_vec_malloc(len * sizeof(float));
+    if (!q->c_float) {
+      return SRSLTE_ERROR;
+    }
     q->len = len;
   }
   return SRSLTE_SUCCESS;
@@ -114,6 +124,9 @@ void srslte_sequence_free(srslte_sequence_t *q) {
   if (q->c_bytes) {
     free(q->c_bytes);
   }
+  if (q->c_float) {
+    free(q->c_float);
+  }
   bzero(q, sizeof(srslte_sequence_t));
 }
 

srslte/lib/fec/src/turbocoder.c

@@ -49,9 +49,6 @@ static bool table_initiated = false;
 
 int srslte_tcod_init(srslte_tcod_t *h, uint32_t max_long_cb) {
 
-  if (srslte_tc_interl_init(&h->interl, max_long_cb)) {
-    return -1;
-  }
   h->max_long_cb = max_long_cb;
   h->temp = srslte_vec_malloc(max_long_cb/8);
   
@@ -63,7 +60,6 @@ int srslte_tcod_init(srslte_tcod_t *h, uint32_t max_long_cb) {
 }
 
 void srslte_tcod_free(srslte_tcod_t *h) {
-  srslte_tc_interl_free(&h->interl);
   h->max_long_cb = 0;
   if (h->temp) {
     free(h->temp);
@@ -86,12 +82,13 @@ int srslte_tcod_encode(srslte_tcod_t *h, uint8_t *input, uint8_t *output, uint32
     return -1;
   }
 
-  if (srslte_tc_interl_LTE_gen(&h->interl, long_cb)) {
+  int longcb_idx = srslte_cbsegm_cbindex(long_cb);
-    fprintf(stderr, "Error initiating TC interleaver\n");
+  if (longcb_idx < 0) {
+    fprintf(stderr, "Invalid CB size %d\n", long_cb);
     return -1;
   }
  
-  per = h->interl.forward;
+  per = tcod_per_fw[longcb_idx];
 
   reg1_0 = 0;
   reg1_1 = 0;

srslte/lib/fec/src/turbodecoder.c

@@ -239,10 +239,13 @@ int srslte_tdec_init(srslte_tdec_t * h, uint32_t max_long_cb)
     goto clean_and_exit;
   }
 
-  if (srslte_tc_interl_init(&h->interleaver, h->max_long_cb) < 0) {
+  for (int i=0;i<SRSLTE_NOF_TC_CB_SIZES;i++) {
+    if (srslte_tc_interl_init(&h->interleaver[i], srslte_cbsegm_cbsize(i)) < 0) {
       goto clean_and_exit;
     }
-
+    srslte_tc_interl_LTE_gen(&h->interleaver[i], srslte_cbsegm_cbsize(i));
+  }
+  h->current_cbidx = -1; 
   ret = 0;
 clean_and_exit:if (ret == -1) {
     srslte_tdec_free(h);
@@ -270,7 +273,9 @@ void srslte_tdec_free(srslte_tdec_t * h)
 
   srslte_map_gen_free(&h->dec);
 
-  srslte_tc_interl_free(&h->interleaver);
+  for (int i=0;i<SRSLTE_NOF_TC_CB_SIZES;i++) {
+    srslte_tc_interl_free(&h->interleaver[i]);    
+  }
 
   bzero(h, sizeof(srslte_tdec_t));
 }
@@ -279,6 +284,11 @@ void srslte_tdec_iteration(srslte_tdec_t * h, srslte_llr_t * input, uint32_t lon
 {
   uint32_t i;
 
+  if (h->current_cbidx >= 0) {
+
+    uint32_t *inter = h->interleaver[h->current_cbidx].forward;
+    uint32_t *deinter = h->interleaver[h->current_cbidx].reverse;
+    
     // Prepare systematic and parity bits for MAP DEC #1
     for (i = 0; i < long_cb; i++) {
       h->syst[i] = input[SRSLTE_TCOD_RATE * i] + h->w[i];
@@ -294,8 +304,8 @@ void srslte_tdec_iteration(srslte_tdec_t * h, srslte_llr_t * input, uint32_t lon
 
     // Prepare systematic and parity bits for MAP DEC #1
     for (i = 0; i < long_cb; i++) {
-    h->syst[i] = h->llr1[h->interleaver.forward[i]]
+      h->syst[i] = h->llr1[inter[i]]
-      - h->w[h->interleaver.forward[i]];
+        - h->w[inter[i]];
       h->parity[i] = input[SRSLTE_TCOD_RATE * i + 2];
     }
     for (i = long_cb; i < long_cb + SRSLTE_TCOD_RATE; i++) {
@@ -310,9 +320,11 @@ void srslte_tdec_iteration(srslte_tdec_t * h, srslte_llr_t * input, uint32_t lon
   
     // Update a-priori LLR from the last iteration
     for (i = 0; i < long_cb; i++) {
-    h->w[i] += h->llr2[h->interleaver.reverse[i]] - h->llr1[i];
+      h->w[i] += h->llr2[deinter[i]] - h->llr1[i];
+    }
+  } else {
+    fprintf(stderr, "Error CB index not set (call srslte_tdec_reset() first\n");    
   }
-
 }
 
 int srslte_tdec_reset(srslte_tdec_t * h, uint32_t long_cb)
@@ -323,28 +335,41 @@ int srslte_tdec_reset(srslte_tdec_t * h, uint32_t long_cb)
     return -1;
   }
   memset(h->w, 0, sizeof(srslte_llr_t) * long_cb);
-  return srslte_tc_interl_LTE_gen(&h->interleaver, long_cb);
+  h->current_cbidx = srslte_cbsegm_cbindex(long_cb);
+  if (h->current_cbidx < 0) {
+    fprintf(stderr, "Invalid CB length %d\n", long_cb);
+    return -1; 
+  }
+  return 0;
 }
 
 void srslte_tdec_decision(srslte_tdec_t * h, uint8_t *output, uint32_t long_cb)
 {
+  uint32_t *deinter = h->interleaver[h->current_cbidx].reverse;
   uint32_t i;
   for (i = 0; i < long_cb; i++) {
-    output[i] = (h->llr2[h->interleaver.reverse[i]] > 0) ? 1 : 0;    
+    output[i] = (h->llr2[deinter[i]] > 0) ? 1 : 0;    
   }
 }
 
 void srslte_tdec_decision_byte(srslte_tdec_t * h, uint8_t *output, uint32_t long_cb)
 {
-  uint32_t i, j;
+  uint32_t i;
+  uint8_t mask[8] = {0x80, 0x40, 0x20, 0x10, 0x8, 0x4, 0x2, 0x1};
+  uint32_t *deinter = h->interleaver[h->current_cbidx].reverse;
+  
   // long_cb is always byte aligned
   for (i = 0; i < long_cb/8; i++) {
-    output[i] = 0; 
+    uint8_t out0 = h->llr2[deinter[8*i+0]]>0?mask[0]:0;
-    for (j=0;j<8;j++) {
+    uint8_t out1 = h->llr2[deinter[8*i+1]]>0?mask[1]:0;
-      if (h->llr2[h->interleaver.reverse[8*i+j]] > 0) {
+    uint8_t out2 = h->llr2[deinter[8*i+2]]>0?mask[2]:0;
-        output[i] |= 1<<(7-j);
+    uint8_t out3 = h->llr2[deinter[8*i+3]]>0?mask[3]:0;
-      }
+    uint8_t out4 = h->llr2[deinter[8*i+4]]>0?mask[4]:0;
-    }
+    uint8_t out5 = h->llr2[deinter[8*i+5]]>0?mask[5]:0;
+    uint8_t out6 = h->llr2[deinter[8*i+6]]>0?mask[6]:0;
+    uint8_t out7 = h->llr2[deinter[8*i+7]]>0?mask[7]:0;
+    
+    output[i] = out0 | out1 | out2 | out3 | out4 | out5 | out6 | out7; 
   }
 }
 

srslte/lib/modem/src/demod_soft.c

@@ -91,12 +91,19 @@ int srslte_demod_soft_demodulate(srslte_demod_soft_t *q, const cf_t* symbols, fl
     break;
   case SRSLTE_DEMOD_SOFT_ALG_APPROX:
     if (nsymbols <= q->max_symbols) {
+      
+      switch(q->table->nbits_x_symbol) {
+        case 2:
+          srslte_vec_sc_prod_fff((float*) symbols, -sqrt(2)/q->sigma, llr, nsymbols*2);
+          break;
+        default:
           llr_approx(symbols, llr, nsymbols, q->table->nsymbols, 
                 q->table->nbits_x_symbol,
                 q->table->symbol_table, q->table->soft_table.idx, 
                 q->table->soft_table.d_idx, q->table->soft_table.min_idx, q->sigma, 
                 q->zones, q->dd);
-      
+          break;
+      }
     } else {
       fprintf(stderr, "Too many symbols (%d>%d)\n", nsymbols, q->max_symbols);
       return -1; 

srslte/lib/modem/test/modem_test.c

@@ -40,14 +40,14 @@ time_t start, finish;
 struct timeval x, y;
 
 int num_bits = 1000;
-srslte_mod_t modulation;
+srslte_mod_t modulation = SRSLTE_MOD_BPSK;
-bool soft_output = false, soft_exact = false;
+bool soft_output = true, soft_exact = false;
 
 void usage(char *prog) {
   printf("Usage: %s [nmse]\n", prog);
   printf("\t-n num_bits [Default %d]\n", num_bits);
   printf("\t-m modulation (1: BPSK, 2: QPSK, 3: QAM16, 4: QAM64) [Default BPSK]\n");
-  printf("\t-s soft outputs [Default hard]\n");
+  printf("\t-s soft outputs [Default %s]\n", soft_output?"soft":"hard");
   printf("\t-e soft outputs exact algorithm [Default approx]\n");
 }
 
@@ -99,11 +99,7 @@ int main(int argc, char **argv) {
   srslte_demod_soft_t demod_soft;
   uint8_t *input, *input_bytes, *output;
   cf_t *symbols, *symbols_bytes;
-  float *llr;
+  float *llr, *llr2;
-
-//  unsigned long strt, fin;
-//  strt = x->tv_usec;
-//  fin = y->tv_usec;
 
   parse_args(argc, argv);
 
@@ -163,6 +159,12 @@ int main(int argc, char **argv) {
     exit(-1);
   }
 
+  llr2 = srslte_vec_malloc(sizeof(float) * num_bits);
+  if (!llr2) {
+    perror("malloc");
+    exit(-1);
+  }
+
   /* generate random data */
   for (i=0;i<num_bits;i++) {
     input[i] = rand()%2;

srslte/lib/phch/src/dci.c

@@ -40,6 +40,7 @@
 #include "srslte/utils/vector.h"
 #include "srslte/utils/debug.h"
 
+#include "dci_sz_table.h"
 
 /* Unpacks a DCI message and configures the DL grant object
  */
@@ -301,6 +302,13 @@ uint32_t srslte_dci_format_sizeof(srslte_dci_format_t format, uint32_t nof_prb)
   }
 }
 
+uint32_t srslte_dci_format_sizeof_lut(srslte_dci_format_t format, uint32_t nof_prb) {
+  if (nof_prb < 100 && format < 4) {
+    return dci_sz_table[nof_prb][format];
+  } else {
+    return 0;
+  }
+}
 /**********************************
  *  DCI Resource Allocation functions
  * ********************************/
@@ -361,7 +369,7 @@ int dci_format0_pack(srslte_ra_ul_dci_t *data, srslte_dci_msg_t *msg, uint32_t n
   *y++ = data->cqi_request;
 
   // Padding with zeros
-  uint32_t n = dci_format0_sizeof(nof_prb);
+  uint32_t n = srslte_dci_format_sizeof_lut(SRSLTE_DCI_FORMAT0, nof_prb);
   while (y - msg->data < n) {
     *y++ = 0;
   }
@@ -380,7 +388,7 @@ int dci_format0_unpack(srslte_dci_msg_t *msg, srslte_ra_ul_dci_t *data, uint32_t
   uint32_t n_ul_hop;
 
   /* Make sure it's a SRSLTE_DCI_FORMAT0 message */
-  if (msg->nof_bits != srslte_dci_format_sizeof(SRSLTE_DCI_FORMAT0, nof_prb)) {
+  if (msg->nof_bits != srslte_dci_format_sizeof_lut(SRSLTE_DCI_FORMAT0, nof_prb)) {
     fprintf(stderr, "Invalid message length for format 0\n");
     return SRSLTE_ERROR;
   }
@@ -474,7 +482,7 @@ int dci_format1_pack(srslte_ra_dl_dci_t *data, srslte_dci_msg_t *msg, uint32_t n
   *y++ = 0;
 
   // Padding with zeros
-  uint32_t n = dci_format1_sizeof(nof_prb);
+  uint32_t n = srslte_dci_format_sizeof_lut(SRSLTE_DCI_FORMAT1, nof_prb);
   while (y - msg->data < n) {
     *y++ = 0;
   }
@@ -489,7 +497,7 @@ int dci_format1_unpack(srslte_dci_msg_t *msg, srslte_ra_dl_dci_t *data, uint32_t
   uint8_t *y = msg->data;
 
   /* Make sure it's a SRSLTE_DCI_FORMAT1 message */
-  if (msg->nof_bits != srslte_dci_format_sizeof(SRSLTE_DCI_FORMAT1, nof_prb)) {
+  if (msg->nof_bits != srslte_dci_format_sizeof_lut(SRSLTE_DCI_FORMAT1, nof_prb)) {
     fprintf(stderr, "Invalid message length for format 1\n");
     return SRSLTE_ERROR;
   }
@@ -614,7 +622,7 @@ int dci_format1As_pack(srslte_ra_dl_dci_t *data, srslte_dci_msg_t *msg, uint32_t
   }
 
   // Padding with zeros
-  uint32_t n = dci_format1A_sizeof(nof_prb);
+  uint32_t n = srslte_dci_format_sizeof_lut(SRSLTE_DCI_FORMAT1A, nof_prb);
   while (y - msg->data < n) {
     *y++ = 0;
   }
@@ -633,7 +641,7 @@ int dci_format1As_unpack(srslte_dci_msg_t *msg, srslte_ra_dl_dci_t *data, uint32
   uint8_t *y = msg->data;
 
   /* Make sure it's a SRSLTE_DCI_FORMAT0 message */
-  if (msg->nof_bits != srslte_dci_format_sizeof(SRSLTE_DCI_FORMAT1A, nof_prb)) {
+  if (msg->nof_bits != srslte_dci_format_sizeof_lut(SRSLTE_DCI_FORMAT1A, nof_prb)) {
     fprintf(stderr, "Invalid message length for format 1A\n");
     return SRSLTE_ERROR;
   }
@@ -757,7 +765,7 @@ int dci_format1Cs_unpack(srslte_dci_msg_t *msg, srslte_ra_dl_dci_t *data, uint32
   /* pack bits */
   uint8_t *y = msg->data;
 
-  if (msg->nof_bits != srslte_dci_format_sizeof(SRSLTE_DCI_FORMAT1C, nof_prb)) {
+  if (msg->nof_bits != srslte_dci_format_sizeof_lut(SRSLTE_DCI_FORMAT1C, nof_prb)) {
     fprintf(stderr, "Invalid message length for format 1C\n");
     return SRSLTE_ERROR;
   }
@@ -804,11 +812,11 @@ int srslte_dci_msg_pack_pdsch(srslte_ra_dl_dci_t *data, srslte_dci_msg_t *msg, s
 
 int srslte_dci_msg_unpack_pdsch(srslte_dci_msg_t *msg, srslte_ra_dl_dci_t *data, uint32_t nof_prb,
     bool crc_is_crnti) {
-  if (msg->nof_bits == srslte_dci_format_sizeof(SRSLTE_DCI_FORMAT1, nof_prb)) {
+  if (msg->nof_bits == srslte_dci_format_sizeof_lut(SRSLTE_DCI_FORMAT1, nof_prb)) {
     return dci_format1_unpack(msg, data, nof_prb);
-  } else if (msg->nof_bits == srslte_dci_format_sizeof(SRSLTE_DCI_FORMAT1A, nof_prb)) {
+  } else if (msg->nof_bits == srslte_dci_format_sizeof_lut(SRSLTE_DCI_FORMAT1A, nof_prb)) {
     return dci_format1As_unpack(msg, data, nof_prb, crc_is_crnti);
-  } else if (msg->nof_bits == srslte_dci_format_sizeof(SRSLTE_DCI_FORMAT1C, nof_prb)) {
+  } else if (msg->nof_bits == srslte_dci_format_sizeof_lut(SRSLTE_DCI_FORMAT1C, nof_prb)) {
     return dci_format1Cs_unpack(msg, data, nof_prb);
   } else {
     return SRSLTE_ERROR;
@@ -877,16 +885,16 @@ int srslte_dci_msg_get_type(srslte_dci_msg_t *msg, srslte_dci_msg_type_t *type,
     uint16_t msg_rnti) 
 {
   DEBUG("Get message type: nof_bits=%d, msg_rnti=0x%x\n", msg->nof_bits, msg_rnti);
-  if (msg->nof_bits == srslte_dci_format_sizeof(SRSLTE_DCI_FORMAT0, nof_prb)
+  if (msg->nof_bits == srslte_dci_format_sizeof_lut(SRSLTE_DCI_FORMAT0, nof_prb)
       && !msg->data[0]) {
     type->type = SRSLTE_DCI_MSG_TYPE_PUSCH_SCHED;
     type->format = SRSLTE_DCI_FORMAT0;
     return SRSLTE_SUCCESS;
-  } else if (msg->nof_bits == srslte_dci_format_sizeof(SRSLTE_DCI_FORMAT1, nof_prb)) {
+  } else if (msg->nof_bits == srslte_dci_format_sizeof_lut(SRSLTE_DCI_FORMAT1, nof_prb)) {
     type->type = SRSLTE_DCI_MSG_TYPE_PDSCH_SCHED; // only these 2 types supported
     type->format = SRSLTE_DCI_FORMAT1;
     return SRSLTE_SUCCESS;
-  } else if (msg->nof_bits == srslte_dci_format_sizeof(SRSLTE_DCI_FORMAT1A, nof_prb)) {
+  } else if (msg->nof_bits == srslte_dci_format_sizeof_lut(SRSLTE_DCI_FORMAT1A, nof_prb)) {
     /* The RNTI is not the only condition. Also some fields in the packet. 
      * if (msg_rnti >= SRSLTE_CRNTI_START && msg_rnti <= SRSLTE_CRNTI_END) {
       type->type = SRSLTE_DCI_MSG_TYPE_RA_PROC_PDCCH;
@@ -897,7 +905,7 @@ int srslte_dci_msg_get_type(srslte_dci_msg_t *msg, srslte_dci_msg_type_t *type,
       type->format = SRSLTE_DCI_FORMAT1A;
     //}
     return SRSLTE_SUCCESS;
-  } else if (msg->nof_bits == srslte_dci_format_sizeof(SRSLTE_DCI_FORMAT1C, nof_prb)) {
+  } else if (msg->nof_bits == srslte_dci_format_sizeof_lut(SRSLTE_DCI_FORMAT1C, nof_prb)) {
     if (msg_rnti == SRSLTE_MRNTI) {
       type->type = SRSLTE_DCI_MSG_TYPE_MCCH_CHANGE;
       type->format = SRSLTE_DCI_FORMAT1C;

srslte/lib/phch/src/dci_sz_table.h

@@ -0,0 +1,132 @@
+/**
+ *
+ * \section COPYRIGHT
+ *
+ * Copyright 2013-2015 The srsLTE Developers. See the
+ * COPYRIGHT file at the top-level directory of this distribution.
+ *
+ * \section LICENSE
+ *
+ * This file is part of the srsLTE library.
+ *
+ * srsLTE is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * srsLTE is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * A copy of the GNU Affero General Public License can be found in
+ * the LICENSE file in the top-level directory of this distribution
+ * and at http://www.gnu.org/licenses/.
+ *
+ */
+
+
+
+static uint32_t dci_sz_table[100][4] = {
+  {15, 13, 15, 5},
+  {15, 17, 15, 5},
+  {17, 15, 17, 5},
+  {18, 17, 18, 5},
+  {19, 17, 19, 7},
+  {19, 18, 19, 7},
+  {21, 19, 21, 8},
+  {21, 22, 21, 8},
+  {21, 22, 21, 9},
+  {21, 22, 21, 9},
+  {21, 23, 21, 9},
+  {22, 21, 22, 9},
+  {22, 21, 22, 9},
+  {22, 21, 22, 9},
+  {22, 21, 22, 10},
+  {22, 23, 22, 10},
+  {23, 22, 23, 11},
+  {23, 25, 23, 11},
+  {23, 25, 23, 11},
+  {23, 25, 23, 11},
+  {23, 25, 23, 11},
+  {23, 25, 23, 11},
+  {23, 25, 23, 11},
+  {25, 27, 25, 12},
+  {25, 27, 25, 12},
+  {25, 27, 25, 12},
+  {25, 27, 25, 12},
+  {25, 23, 25, 11},
+  {25, 27, 25, 11},
+  {25, 27, 25, 12},
+  {25, 27, 25, 12},
+  {25, 27, 25, 12},
+  {25, 27, 25, 12},
+  {25, 27, 25, 12},
+  {25, 27, 25, 13},
+  {25, 27, 25, 13},
+  {25, 27, 25, 13},
+  {25, 27, 25, 13},
+  {25, 27, 25, 13},
+  {25, 27, 25, 13},
+  {25, 28, 25, 13},
+  {25, 28, 25, 13},
+  {25, 28, 25, 13},
+  {25, 29, 25, 13},
+  {25, 29, 25, 13},
+  {27, 29, 27, 13},
+  {27, 30, 27, 13},
+  {27, 30, 27, 13},
+  {27, 30, 27, 13},
+  {27, 31, 27, 13},
+  {27, 31, 27, 13},
+  {27, 31, 27, 13},
+  {27, 33, 27, 13},
+  {27, 33, 27, 13},
+  {27, 33, 27, 13},
+  {27, 33, 27, 13},
+  {27, 33, 27, 13},
+  {27, 33, 27, 13},
+  {27, 34, 27, 13},
+  {27, 34, 27, 13},
+  {27, 34, 27, 13},
+  {27, 35, 27, 13},
+  {27, 35, 27, 13},
+  {27, 35, 27, 13},
+  {27, 30, 27, 14},
+  {27, 31, 27, 14},
+  {27, 31, 27, 14},
+  {27, 31, 27, 14},
+  {27, 31, 27, 14},
+  {27, 33, 27, 14},
+  {27, 33, 27, 14},
+  {27, 33, 27, 14},
+  {27, 33, 27, 14},
+  {27, 33, 27, 14},
+  {27, 33, 27, 14},
+  {27, 33, 27, 14},
+  {27, 33, 27, 14},
+  {27, 34, 27, 14},
+  {27, 34, 27, 14},
+  {27, 34, 27, 14},
+  {27, 34, 27, 14},
+  {27, 35, 27, 14},
+  {27, 35, 27, 14},
+  {27, 35, 27, 14},
+  {27, 35, 27, 14},
+  {27, 36, 27, 14},
+  {27, 36, 27, 14},
+  {27, 36, 27, 14},
+  {27, 36, 27, 14},
+  {27, 37, 27, 14},
+  {27, 37, 27, 14},
+  {28, 37, 28, 14},
+  {28, 37, 28, 14},
+  {28, 38, 28, 14},
+  {28, 38, 28, 15},
+  {28, 38, 28, 15},
+  {28, 38, 28, 15},
+  {28, 39, 28, 15},
+  {28, 39, 28, 15},
+  {28, 39, 28, 15}
+};
+

srslte/lib/phch/src/pdcch.c

@@ -333,7 +333,7 @@ int srslte_pdcch_decode_msg(srslte_pdcch_t *q,
       fprintf(stderr, "Invalid location: nCCE: %d, L: %d, NofCCE: %d\n", 
         location->ncce, location->L, q->nof_cce);
     } else {
-      uint32_t nof_bits = srslte_dci_format_sizeof(format, q->cell.nof_prb);
+      uint32_t nof_bits = srslte_dci_format_sizeof_lut(format, q->cell.nof_prb);
       uint32_t e_bits = PDCCH_FORMAT_NOF_BITS(location->L);
     
       DEBUG("Decoding DCI offset %d, e_bits: %d, msg_len %d (nCCE: %d, L: %d)\n", 
@@ -424,7 +424,8 @@ int srslte_pdcch_extract_llr(srslte_pdcch_t *q, cf_t *sf_symbols, cf_t *ce[SRSLT
     }
 
     /* demodulate symbols */
-    srslte_demod_soft_sigma_set(&q->demod, 1.0);
+    //srslte_vec_sc_prod_fff((float*) q->d, -sqrt(2), q->llr, nof_symbols*2);
+    srslte_demod_soft_sigma_set(&q->demod, sqrt(0.5));
     srslte_demod_soft_demodulate(&q->demod, q->d, q->llr, nof_symbols);
 
     /* descramble */

srslte/lib/phch/src/pusch.c

@@ -502,8 +502,6 @@ int srslte_pusch_uci_encode(srslte_pusch_t *q, srslte_pusch_cfg_t *cfg, srslte_s
   }
 }
 
-uint8_t temp[1024*1024];
-
 /** Converts the PUSCH data bits to symbols mapped to the slot ready for transmission
  */
 int srslte_pusch_uci_encode_rnti(srslte_pusch_t *q, srslte_pusch_cfg_t *cfg, srslte_softbuffer_tx_t *softbuffer,
@@ -532,7 +530,7 @@ int srslte_pusch_uci_encode_rnti(srslte_pusch_t *q, srslte_pusch_cfg_t *cfg, srs
       return SRSLTE_ERROR;
     }
 
-    if (rnti != q->rnti) {
+    if (rnti != q->rnti || !q->rnti_is_set) {
       srslte_sequence_t seq; 
       if (srslte_sequence_pusch(&seq, rnti, 2 * cfg->sf_idx, q->cell.id, cfg->nbits.nof_bits)) {
         return SRSLTE_ERROR; 

srslte/lib/phch/test/pdcch_test.c

@@ -43,19 +43,21 @@ srslte_cell_t cell = {
 };
 
 uint32_t cfi = 1;
+bool print_dci_table; 
 
 void usage(char *prog) {
-  printf("Usage: %s [cell.cpv]\n", prog);
+  printf("Usage: %s [cfpndv]\n", prog);
   printf("\t-c cell id [Default %d]\n", cell.id);
   printf("\t-f cfi [Default %d]\n", cfi);
   printf("\t-p cell.nof_ports [Default %d]\n", cell.nof_ports);
   printf("\t-n cell.nof_prb [Default %d]\n", cell.nof_prb);
+  printf("\t-d Print DCI table [Default %s]\n", print_dci_table?"yes":"no");
   printf("\t-v [set srslte_verbose to debug, default none]\n");
 }
 
 void parse_args(int argc, char **argv) {
   int opt;
-  while ((opt = getopt(argc, argv, "cell.cpnfv")) != -1) {
+  while ((opt = getopt(argc, argv, "cfpndv")) != -1) {
     switch (opt) {
     case 'p':
       cell.nof_ports = atoi(argv[optind]);
@@ -69,6 +71,9 @@ void parse_args(int argc, char **argv) {
     case 'c':
       cell.id = atoi(argv[optind]);
       break;
+    case 'd':
+      print_dci_table = true;
+      break;
     case 'v':
       srslte_verbose++;
       break;
@@ -102,6 +107,25 @@ int test_dci_payload_size() {
     printf("  %2d:\t%2d\t%2d\t%2d\t%2d\n", n, x[0], x[1], x[2], x[3]);
   }
   printf("Ok\n");
+  
+  if (print_dci_table) {
+    printf("dci_sz_table[100][4] = {\n");
+    for (i=0;i<100;i++) {
+      printf("  {");
+      for (int j=0;j<4;j++) {
+        printf("%d",srslte_dci_format_sizeof(formats[j], i));
+        if (j<3) {
+          printf(", ");
+        }
+      }
+      if (i<99) {
+        printf("},\n");
+      } else {
+        printf("}\n");
+      }
+    }
+    printf("};\n");
+  }
   return 0;
 }
 

srslte/lib/scrambling/src/scrambling.c

@@ -37,12 +37,8 @@ void srslte_scrambling_f(srslte_sequence_t *s, float *data) {
 }
 
 void srslte_scrambling_f_offset(srslte_sequence_t *s, float *data, int offset, int len) {
-  int i;  
   assert (len + offset <= s->len);
-
+  srslte_vec_prod_fff(data, &s->c_float[offset], data, len);
-  for (i = 0; i < len; i++) {
-    data[i] = data[i] * (1-2*s->c[i + offset]);
-  }
 }
 
 void srslte_scrambling_c(srslte_sequence_t *s, cf_t *data) {
@@ -50,12 +46,8 @@ void srslte_scrambling_c(srslte_sequence_t *s, cf_t *data) {
 }
 
 void srslte_scrambling_c_offset(srslte_sequence_t *s, cf_t *data, int offset, int len) {
-  int i;
   assert (len + offset <= s->len);
-
+  srslte_vec_prod_cfc(data, &s->c_float[offset], data, len);
-  for (i = 0; i < len; i++) {
-    data[i] = data[i] * (1 - 2 * s->c[i + offset]);
-  }
 }
 
 void scrambling_b(uint8_t *c, uint8_t *data, int offset, int len) {

srslte/lib/utils/src/vector.c

@@ -381,6 +381,17 @@ void srslte_vec_prod_cfc(cf_t *x, float *y, cf_t *z, uint32_t len) {
 #endif
 }
 
+void srslte_vec_prod_fff(float *x, float *y, float *z, uint32_t len) {
+#ifndef HAVE_VOLK_MULT_REAL2_FUNCTION
+  int i;
+  for (i=0;i<len;i++) {
+    z[i] = x[i]*y[i];
+  }
+#else
+  volk_32f_x2_multiply_32f(z,x,y,len);
+#endif
+}
+
 void srslte_vec_prod_ccc(cf_t *x,cf_t *y, cf_t *z, uint32_t len) {
 #ifndef HAVE_VOLK_MULT2_FUNCTION
   int i;