[Elecraft] FT8: "Magic radio"?

[Wes Stewart]

I quoted the context.

On 7/3/2018 6:35 PM, Neil Zampella wrote:
> Wes,
>
> you're taking that out of context.   The structured messages allow for 
> redundancy if some of the original message is missing. The decoder can take 
> the sync symbols so that the system can understand what type of message it is, 
> it still needs the callsign and signal report.
>
> More details can be found here: 
> https://physics.princeton.edu/pulsar/k1jt/wsjtx-doc/wsjtx-main-1.9.1.html#PROTOCOLS
> and here https://physics.princeton.edu/pulsar/k1jt/FrankeTaylor_QEX_2016.pdf 
> which covers JT65, but which forms some of the basis for the other JT/FT 
> protocols.
>
> Neil, KN3ILZ
>
>
> On 7/3/2018 5:16 PM, Wes Stewart wrote:
>> In a message to this group back in February I wrote:
>>
>>    Quoting G4WJS: "For FT8 the net effect is that
>>    up to about 5 seconds of a message may be missing yet still
>>    be decoded. The amount missing can be either a truncation or
>>    parts of the message below the decoding threshold. The FT8
>>    message is structured with sync symbols at the start, middle
>>    and end so missing the start or end may have less impact
>>    than missing other parts since mostly sync symbols may be
>>    lost and they contain no message information."
>>
>> Hence, I dubbed the mode, "Imaginary"  since it hears things that aren't there.
>>
>> Wes  N7WS