MMDVM/MMDVMHost
1
0
Fork 0
mirror of https://github.com/g4klx/MMDVMHost synced 2025-12-21 23:45:49 +08:00
Code Issues Packages Projects Releases Wiki Activity

Correct max. number of possible V/D 2 errors and document its meaning.

Browse Source
This commit is contained in:
Mathias Weyland
2016-04-22 13:53:48 +02:00
parent b42d20d08e
commit 1852f140af
1 changed files with 6 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
YSFPayload.cpp
View File

@@ -423,7 +423,12 @@ void CYSFPayload::decodeVDMode2(unsigned char fn)
}
}
LogMessage("YSF, V/D Mode 2, Repetition FEC %u/270 (%.1f%%)", errors, float(errors) / 270.0F);
// "errors" is the number of triplets that were recognized to be corrupted
// and that were corrected. There are 27 of those per VCH and 5 VCH per CC,
// yielding a total of 27*5 = 135. I believe the expected value of this
// error distribution to be Bin(1;3,BER)+Bin(2;3,BER) which entails 75% for
// BER = 0.5.
LogMessage("YSF, V/D Mode 2, Repetition FEC %u/135 (%.1f%%)", errors, float(errors) / 135.0F);
unsigned char dch[25U];