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authorAlexander Chemeris <Alexander.Chemeris@gmail.com>2017-03-24 23:24:22 -0700
committerAlexander Chemeris <Alexander.Chemeris@gmail.com>2017-05-29 15:15:36 +0300
commit5e65b531e0b9253c33a476f50bffc23eb4f0afa0 (patch)
tree9e0613b2e30bf903ec148ad45ef1c95b351ce4b1
parentb992d0a51511598e37ed89aaf286e985f88ff5ec (diff)
sigProcLib: Fix number of tail bits in random Normal Bursts and zero Stealing Bits.
This bug only affects generation of normal bursts filled with random bits which are used in test mode. It doesn't affect operation of osmo-trx during normal operation. That's why it has stayed unnoticed for so long. Each Normal Burst has 3 tail bits, not 4. Also it's better to set stealing bits to 0 for maximum compatibility. We may want to introduce a selector for each bit whether to set it to 0, to 1 or to a random number. Change-Id: I0377029556c8b681b3ba3b635bf19572b34546ea
-rw-r--r--Transceiver52M/sigProcLib.cpp12
1 files changed, 9 insertions, 3 deletions
diff --git a/Transceiver52M/sigProcLib.cpp b/Transceiver52M/sigProcLib.cpp
index c51d094..9a8c824 100644
--- a/Transceiver52M/sigProcLib.cpp
+++ b/Transceiver52M/sigProcLib.cpp
@@ -927,19 +927,25 @@ signalVector *genRandNormalBurst(int tsc, int sps, int tn)
signalVector *burst;
/* Tail bits */
- for (; i < 4; i++)
+ for (; i < 3; i++)
(*bits)[i] = 0;
/* Random bits */
- for (; i < 61; i++)
+ for (; i < 60; i++)
(*bits)[i] = rand() % 2;
+ /* Stealing bit */
+ (*bits)[i++] = 0;
+
/* Training sequence */
for (int n = 0; i < 87; i++, n++)
(*bits)[i] = gTrainingSequence[tsc][n];
+ /* Stealing bit */
+ (*bits)[i++] = 0;
+
/* Random bits */
- for (; i < 144; i++)
+ for (; i < 145; i++)
(*bits)[i] = rand() % 2;
/* Tail bits */