From ac54521aed853a5d19bb71be6c36d85ad527a0c2 Mon Sep 17 00:00:00 2001
From: Cedric Roux <cedric.roux@eurecom.fr>
Date: Tue, 17 Oct 2017 12:31:35 +0200
Subject: [PATCH] do not put random bits in DCI, put 0 instead (to avoid false
DCI detections)
---
openair1/PHY/LTE_TRANSPORT/dci.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/openair1/PHY/LTE_TRANSPORT/dci.c b/openair1/PHY/LTE_TRANSPORT/dci.c
index b06f69181f3..3a42a4c5eaa 100755
--- a/openair1/PHY/LTE_TRANSPORT/dci.c
+++ b/openair1/PHY/LTE_TRANSPORT/dci.c
@@ -2257,11 +2257,18 @@ uint8_t generate_dci_top(uint8_t num_pdcch_symbols,
y[0] = &yseq0[0];
y[1] = &yseq1[0];
+#if 0
// reset all bits to <NIL>, here we set <NIL> elements as 2
// memset(e, 2, DCI_BITS_MAX);
// here we interpret NIL as a random QPSK sequence. That makes power estimation easier.
for (i=0; i<DCI_BITS_MAX; i++)
e[i]=taus()&1;
+#endif
+
+ /* clear all bits, the above code may generate too much false detections
+ * (not sure about this, to be checked somehow)
+ */
+ memset(e, 0, DCI_BITS_MAX);
e_ptr = e;
--
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