From ddfff3edad194e5f0ffe3c7a30dffabcb928a30a Mon Sep 17 00:00:00 2001
From: Xavier Arteaga <xavier@softwareradiosystems.com>
Date: Thu, 11 Mar 2021 19:09:20 +0100
Subject: [PATCH] SRSUE: Zero transmit buffer if the slot is not UL

---
 srsue/src/phy/nr/cc_worker.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/srsue/src/phy/nr/cc_worker.cc b/srsue/src/phy/nr/cc_worker.cc
index 4fd724988..1c6550a31 100644
--- a/srsue/src/phy/nr/cc_worker.cc
+++ b/srsue/src/phy/nr/cc_worker.cc
@@ -271,6 +271,8 @@ bool cc_worker::work_ul()
 {
   // Check if it is a DL slot, if not skip
   if (!srslte_tdd_nr_is_ul(&phy->cfg.tdd, 0, ul_slot_cfg.idx)) {
+    // No NR signal shall be transmitted
+    srslte_vec_cf_zero(tx_buffer[0], ue_ul.ifft.sf_sz);
     return true;
   }