Re: [aprssig] Re: [amsat-bb] RE: AO16/LO19 Uplink w ANY PC!

[Ghislain RUY <ruygh@xxxxxxx>]

Just right,
that's exactly what Christophe and i have done for the P3D demodulator : a
costas loop. But, from my experience and extensive tests i made with low
Eb/N0, the design of the loop filter of the Costas loop is not as dead simple.

Ghis, F1HDD.

Laura Halliday a écrit :

> This is an artifact of the demodulator, not of PSK itself. It's
> perfectly straightforward to make a PSK demodulator that tracks
> Doppler automatically. PLLs and Costas Loops are both dead easy
> to implement in either hardware or software at these bit rates.
>
> References: any decent text on communications. I like Haykin (see
> http://www.qsl.net/vaeldh/reading.html).
>
> Laura Halliday VA3LDH   "Que les nuages soient notre pied
> Grid: FN03gs                a terre..." - Hospital/Shafte

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