>From: Bill Somerville [mailto:[email protected]] On 26/05/2020 10:33, Reino Talarmo wrote: > Just a single bit error in a proper place adds e.g. /R to the decoded message.
>that is far from the actual position. A single bit error will never result in an incorrect decode, the amount of FEC information incuded can recover a lot more than single bit errors. On top of that the FT4/T8/MSK144 message encoding includes a CRC value used to validate the message, because of this the vast majority of incorrect message decodes are rejected because the CRC does not match the message content. Bill, I should have more clearly stated that a single bit in decoded message data part that passes CRC test can be the cause of a '/R' or not a '/R' and that is reason why there are so many false decodes containing the '/R'. I assumed that the source coding behaves like that! Of course that message is never actually sent and so there is no relevant bit error rate and if only that bit is changed in the decoded message, then CRC will catch it, hi! 73, Reino OH3mA _______________________________________________ wsjt-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/wsjt-devel
