From d2a19c3043e5f62d092d74b3e25291bd60b91193 Mon Sep 17 00:00:00 2001
From: Xavier Arteaga <xavier@softwareradiosystems.com>
Date: Mon, 14 Jun 2021 18:47:08 +0200
Subject: [PATCH] SCH minimum number of iterations to 2 to reduce systematic
 false alarm probability

---
 lib/src/phy/phch/sch.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/src/phy/phch/sch.c b/lib/src/phy/phch/sch.c
index 50e41e0ec..aa2499d86 100644
--- a/lib/src/phy/phch/sch.c
+++ b/lib/src/phy/phch/sch.c
@@ -23,6 +23,7 @@
 #include <string.h>
 #include <strings.h>
 
+#define SRSRAN_PDSCH_MIN_TDEC_ITERS 2
 #define SRSRAN_PDSCH_MAX_TDEC_ITERS 10
 
 #ifdef LV_HAVE_SSE
@@ -433,8 +434,9 @@ bool decode_tb_cb(srsran_sch_t*           q,
           crc_ptr = &q->crc_tb;
         }
 
-        // CRC is OK
-        if (!srsran_crc_checksum_byte(crc_ptr, &data[cb_idx * rlen / 8], len_crc)) {
+        // CRC is OK and ran the minimum number of iterations
+        if (!srsran_crc_checksum_byte(crc_ptr, &data[cb_idx * rlen / 8], len_crc) &&
+            (cb_noi >= SRSRAN_PDSCH_MIN_TDEC_ITERS)) {
           softbuffer->cb_crc[cb_idx] = true;
           early_stop                 = true;