diff options
| author | Niro Mahasinghe <niroshan@cellXica.net> | 2017-11-03 12:22:34 +0100 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2017-11-03 13:03:55 +0100 |
| commit | 834e2ac0ead4544c207ed365151c8c898b5a949c (patch) | |
| tree | e90f5141bc2c82f869ee39ddabaf5c2c081df0c6 | |
| parent | ed029dfab959bca74bd43d86922727c2047eeb4d (diff) | |
gsm0503_coding.c: Fix tch_efr_unreorder() of one bit
There's an error in tch_efr_unreorder() function in gsm0503_coding.c
that results in increased RBER. One of the indices used by repetition
bit recombining in this function doesn't match 3GPP TS 45.003 section
3.1.1.3, specifically "w(k) = s(223) for k = 231 and 232".
This bug resulted in RBER even under ideal conditions, with no
fading or AWGN present.
Change-Id: I153da7bbc1bb3e01ed31eb5a7417e90841cfcde3
| -rw-r--r-- | src/coding/gsm0503_coding.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/coding/gsm0503_coding.c b/src/coding/gsm0503_coding.c index 5213dc5f..c4bdb816 100644 --- a/src/coding/gsm0503_coding.c +++ b/src/coding/gsm0503_coding.c @@ -1751,7 +1751,7 @@ static void tch_efr_unreorder(ubit_t *s, ubit_t *p, const ubit_t *w) sum = s[172] + w[178] + w[179]; s[172] = (sum > 2); memcpy(s + 174, w + 180, 50); - sum = s[220] + w[230] + w[231]; + sum = s[222] + w[230] + w[231]; s[222] = (sum > 2); memcpy(s + 224, w + 232, 20); memcpy(p, w + 252, 8); |