Re: [Discuss-gnuradio] Re: Ideas for improved FM reception

[Martin Dvh]

Patrick Strasser wrote:
> Martin Dvh schrieb am 2007-12-07 18:28:
> 
>> The second thing I want to do is detecting if multiple transmitters
>> (at different locations and frequencies) transmit the same radiostation.
>> With a single tuner I can capture all these signals at the same time.
> 
> Provided they are within 8 or 16MHz.
> 
>> Then do a correlation to get there phase and time relationship.
>> And then smartly combine them to get better signal quality.
> 
> Clever boy!
> 
> Do you have in mind that RD(B)S transmits "alternative frequencies"?
> This is a feature to enable seamless frequency switch for mobile users
> (cars). Never thought of it to use it simultaneously.
> This would spare you a lot of correlation.
Yes, that is exactly how I got the idea.
So I intend to use RDS.
I already have an RDS decoder in place.
You still need a correlation for the phase/time relationship but you don't have 
to correlate every frequency to determine if it is a "mirror" of
your current station.

Greetings,
Martin

> Do you have some code already?
> 
> Patrick