From c7c2ab6ed5fa978d05231b1767ba3a179050f3b4 Mon Sep 17 00:00:00 2001
From: Ismael Gomez <ismagom@gmail.com>
Date: Fri, 22 Sep 2017 00:58:21 +0200
Subject: [PATCH] Fix to prevent USRP from disabling TX when transmitting zeros

---
 srsue/src/phy/phch_common.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/srsue/src/phy/phch_common.cc b/srsue/src/phy/phch_common.cc
index 6baf0b70e..d49b1ced2 100644
--- a/srsue/src/phy/phch_common.cc
+++ b/srsue/src/phy/phch_common.cc
@@ -61,6 +61,10 @@ phch_common::phch_common(uint32_t max_mutex_) : tx_mutex(max_mutex_)
   cur_pusch_power = 0;
   bzero(zeros, 50000*sizeof(cf_t));
 
+  // FIXME: This is an ungly fix to avoid the TX filters to empty
+  for (int i=0;i<50000;i++) {
+    zeros[i] = 0.01*cexpf(((float) i/50000)*0.1*_Complex_I);
+  }
   bzero(&dl_metrics, sizeof(dl_metrics_t));
   dl_metrics_read = true;
   dl_metrics_count = 0;