From c60d2078269d44705605a7807a78e4e56dd4a12b Mon Sep 17 00:00:00 2001
From: Xavier Arteaga <xavier@softwareradiosystems.com>
Date: Tue, 2 Feb 2021 09:16:20 +0100
Subject: [PATCH] Add fix phase shift in gNb PHY

---
 lib/src/phy/enb/enb_dl_nr.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/lib/src/phy/enb/enb_dl_nr.c b/lib/src/phy/enb/enb_dl_nr.c
index 4795f07f2..f61b39d4c 100644
--- a/lib/src/phy/enb/enb_dl_nr.c
+++ b/lib/src/phy/enb/enb_dl_nr.c
@@ -11,6 +11,7 @@
  */
 
 #include "srslte/phy/enb/enb_dl_nr.h"
+#include <complex.h>
 
 static int enb_dl_alloc_prb(srslte_enb_dl_nr_t* q, uint32_t new_nof_prb)
 {
@@ -155,6 +156,17 @@ void srslte_enb_dl_nr_gen_signal(srslte_enb_dl_nr_t* q)
     return;
   }
 
+  // Temporary symbol phase shift
+  uint32_t nof_re = SRSLTE_NRE * q->carrier.nof_prb;
+  for (uint32_t i = 0; i < 2; i++) {
+    for (uint32_t j = 0; j < 7; j++) {
+      srslte_vec_sc_prod_ccc(&q->sf_symbols[0][(i * 7 + j) * nof_re],
+                             cexpf(I * (11.0f * j - 2.0f) * M_PI / 16),
+                             &q->sf_symbols[0][(i * 7 + j) * nof_re],
+                             nof_re);
+    }
+  }
+
   for (uint32_t i = 0; i < q->nof_tx_antennas; i++) {
     srslte_ofdm_tx_sf(&q->fft[i]);
   }