From a51c1f93b5c741247662c4bddae8a0aaa328235f Mon Sep 17 00:00:00 2001
From: Laurent THOMAS <laurent.thomas@open-cells.com>
Date: Tue, 24 May 2022 08:52:13 +0200
Subject: [PATCH] Remove unused code

---
 openair1/PHY/NR_REFSIG/dmrs_nr.c    | 68 -----------------------------
 openair1/PHY/NR_REFSIG/dmrs_nr.h    |  1 -
 openair1/PHY/NR_REFSIG/ss_pbch_nr.h |  2 -
 3 files changed, 71 deletions(-)

diff --git a/openair1/PHY/NR_REFSIG/dmrs_nr.c b/openair1/PHY/NR_REFSIG/dmrs_nr.c
index 2e270318f8..ca901e1452 100644
--- a/openair1/PHY/NR_REFSIG/dmrs_nr.c
+++ b/openair1/PHY/NR_REFSIG/dmrs_nr.c
@@ -295,74 +295,6 @@ uint16_t get_dmrs_freq_idx_ul(uint16_t n, uint8_t k_prime, uint8_t delta, uint8_
 
 #define CHECK_DMRS_PBCH_SEQUENCE
 
-void generate_dmrs_pbch(uint32_t dmrs_pbch_bitmap[DMRS_PBCH_I_SSB][DMRS_PBCH_N_HF][DMRS_BITMAP_SIZE], uint16_t Nid_cell)
-{
-  uint32_t cinit;
-  int i_ssb;
-  int n_hf;
-  int _i_ssb;
-
-#ifdef CHECK_DMRS_PBCH_SEQUENCE
-
-  uint32_t dmrs_bitmap[DMRS_PBCH_I_SSB][DMRS_PBCH_N_HF][DMRS_BITMAP_SIZE];
-  uint32_t *dmrs_sequence =  calloc(CELL_DMRS_LENGTH, sizeof(uint32_t));
-  if (dmrs_sequence == NULL) {
-    msg("Fatal error: memory allocation problem \n");
-  	assert(0);
-  }
-  else
-  {
-    printf("Check of demodulation reference signal of pbch sequence \n");
-  }
-
-#endif
-
-  /* for each slot number */
-  for (i_ssb = 0; i_ssb<DMRS_PBCH_I_SSB; i_ssb++) {
-
-    /* for each ofdm position */
-    for (n_hf=0; n_hf<DMRS_PBCH_N_HF; n_hf++) {
-
-      _i_ssb = i_ssb + 4*n_hf;
-
-      cinit = (((_i_ssb + 1)*((Nid_cell>>4) + 1))<<11) + ((_i_ssb + 1)<<6) + (Nid_cell%4);
-
-      pseudo_random_sequence_optimised(DMRS_BITMAP_SIZE, &(dmrs_pbch_bitmap[i_ssb][n_hf][0]), cinit);
-
-#ifdef CHECK_DMRS_PBCH_SEQUENCE
-
-      /* it allows checking generated with standard generation code */
-      pseudo_random_sequence(DMRS_BITMAP_SIZE*sizeof(uint32_t), dmrs_sequence, cinit);
-
-      int j = 0;
-      int k = 0;
-
-      /* format for getting bitmap from uint32_t */
-      for (int i=0; i<DMRS_BITMAP_SIZE; i++) {
-    	dmrs_bitmap[i_ssb][n_hf][i] = 0;
-    	/* convert to bitmap */
-      	for (; j < k + 32; j++) {
-          dmrs_bitmap[i_ssb][n_hf][i] |= (dmrs_sequence[j]<<j);
-      	}
-      	k = j;
-      }
-
-      for (int i=0; i<DMRS_BITMAP_SIZE; i++) {
-        if (dmrs_pbch_bitmap[i_ssb][n_hf][i] != dmrs_bitmap[i_ssb][n_hf][i]) {
-          printf("Error in gold sequence computation for ns %d l %d and index %i : 0x%x 0x%x \n", i_ssb, n_hf, i, dmrs_pbch_bitmap[i_ssb][n_hf][i], dmrs_bitmap[i_ssb][n_hf][i]);
-      	  assert(0);
-        }
-      }
-
-#endif
-
-    }
-  }
-
-#ifdef CHECK_DMRS_PBCH_SEQUENCE
-  free(dmrs_sequence);
-#endif
-}
 /* return the position of next dmrs symbol in a slot */
 int8_t get_next_dmrs_symbol_in_slot(uint16_t  ul_dmrs_symb_pos, uint8_t counter, uint8_t end_symbol)
 {
diff --git a/openair1/PHY/NR_REFSIG/dmrs_nr.h b/openair1/PHY/NR_REFSIG/dmrs_nr.h
index b9e9ca6f0d..13a83be53f 100644
--- a/openair1/PHY/NR_REFSIG/dmrs_nr.h
+++ b/openair1/PHY/NR_REFSIG/dmrs_nr.h
@@ -53,7 +53,6 @@
 
 int pseudo_random_sequence(int M_PN, uint32_t *c, uint32_t cinit);
 void lte_gold_new(LTE_DL_FRAME_PARMS *frame_parms, uint32_t lte_gold_table[20][2][14], uint16_t Nid_cell);
-void generate_dmrs_pbch(uint32_t dmrs_pbch_bitmap[DMRS_PBCH_I_SSB][DMRS_PBCH_N_HF][DMRS_BITMAP_SIZE], uint16_t Nid_cell);
 uint16_t get_dmrs_freq_idx_ul(uint16_t n, uint8_t k_prime, uint8_t delta, uint8_t dmrs_type);
 
 uint8_t allowed_xlsch_re_in_dmrs_symbol(uint16_t k,
diff --git a/openair1/PHY/NR_REFSIG/ss_pbch_nr.h b/openair1/PHY/NR_REFSIG/ss_pbch_nr.h
index 44f8549258..5572604e55 100644
--- a/openair1/PHY/NR_REFSIG/ss_pbch_nr.h
+++ b/openair1/PHY/NR_REFSIG/ss_pbch_nr.h
@@ -80,8 +80,6 @@
 /* see TS 38211 7.4.1.4 Demodulation reference signals for PBCH */
 #define  DMRS_PBCH_I_SSB              (8)         /* maximum index value for SSB/PBCH which can have alength of L=4 or L=8 */
 #define  DMRS_PBCH_N_HF               (2)         /* half frame indication - 0 for first part of frame and 1 for second part of frame */
-#define  DMRS_ALIGNMENT_32_BIT        (20)        /* it is just for ensuring a 32 bits alignment for storing dmrs pbch into a 32 bits map */
-#define  DMRS_BITMAP_SIZE             ((DMRS_PBCH_NUMBER-DMRS_ALIGNMENT_32_BIT)/32)   /* size is divided by 32 (to get bitmap on uint32) DMRS_PBCH_NUMBER should be a multiple of 32 */
 
 #endif /* SS_PBCH_NR_H */