Could you not use a standard time source such as that available from the GPS
satellite system, or where it can be received MSF.
Fred
G4SPR
----- Original Message -----
From: "Alberto di Bene" <[email protected]>
To: <[email protected]>
Sent: 27 April 2001 18:58
Subject: LF: Re: DFCW an idea.
Rik Strobbe wrote:
[snip]
> The most recent version of QRS supports 'time synchronisation'. I am not
a
> specialist in DSP stuff, but my 'intuition' says that the knowledge of
the
> exact start/stop time of a dot can be used to improve SNR.
>
> 73, Rik ON7YD
The ideal way would be to know the exact time (i.e. phase) and frequency
of
the audio tone, so that to implement a matched filter, but this requires
IMHO a Rubidium standard at least, an item not commonly found in the
average
OM shack (not in mine anyway).
73 Alberto I2PHD
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