From b6ab1eb9e1492d4666173a2cedee66b56716a92d Mon Sep 17 00:00:00 2001
From: rmagueta <rmagueta@allbesmart.pt>
Date: Mon, 22 Feb 2021 15:34:15 +0000
Subject: [PATCH] Fix RA preamble shift at gNB

---
 openair1/PHY/NR_TRANSPORT/nr_prach.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/openair1/PHY/NR_TRANSPORT/nr_prach.c b/openair1/PHY/NR_TRANSPORT/nr_prach.c
index b5a3c061e9..0fc2de2d0a 100644
--- a/openair1/PHY/NR_TRANSPORT/nr_prach.c
+++ b/openair1/PHY/NR_TRANSPORT/nr_prach.c
@@ -681,7 +681,7 @@ void rx_nr_prach(PHY_VARS_gNB *gNB,
         preamble_shift  -= NCS;
 	
         if (preamble_shift < 0)
-          preamble_shift+=N_ZC;
+          preamble_shift+=((N_ZC/NCS)*NCS);
       }
     } else { // This is the high-speed case
       new_dft = 0;