Re: [Discuss-gnuradio] PSK demodulation of a sub-carrier sent over FM

2014-10-24 Thread Martin Braun 
On 10/23/2014 03:36 PM, Raydel Abreu (CM2ESP) wrote:
> Thank you Lou and Martin.
> 
> Will try and take a look. One more thing is there any extra to do if the
> PSK signal is +-67 degrees instead of nomal 90 degrees or the PSK
> demodulator just handles it as usual.

I've never seen this before, but you'll have to play around with the
constellation objects. Look at the Python code for PSK for some pointers.

M

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Re: [Discuss-gnuradio] PSK demodulation of a sub-carrier sent over FM

2014-10-23 Thread Raydel Abreu (CM2ESP) 
Thank you Lou and Martin.

Will try and take a look. One more thing is there any extra to do if the
PSK signal is +-67 degrees instead of nomal 90 degrees or the PSK
demodulator just handles it as usual.

Thanks,

Raydel

2014-10-23 8:32 GMT-04:00 Martin Braun :

> On 10/22/2014 11:27 PM, madengr wrote:
> > Raydel Abreu (CM2ESP) wrote
> >> However I would like to know how can I demodulate a PSK
> >> transmission which is carried over a typical FM signal.
> >
> > IIRC you would just do the WBFM demod, then the PSK demod.  See the
> > gr-rds: https://github.com/bastibl/gr-rds
>
> That sounds correct. I know hams sometimes do this to get better
> transmissions when using their HF gear.
>
> M
>
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Re: [Discuss-gnuradio] PSK demodulation of a sub-carrier sent over FM

2014-10-23 Thread Martin Braun 
On 10/22/2014 11:27 PM, madengr wrote:
> Raydel Abreu (CM2ESP) wrote
>> However I would like to know how can I demodulate a PSK
>> transmission which is carried over a typical FM signal.
> 
> IIRC you would just do the WBFM demod, then the PSK demod.  See the
> gr-rds: https://github.com/bastibl/gr-rds

That sounds correct. I know hams sometimes do this to get better
transmissions when using their HF gear.

M

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Re: [Discuss-gnuradio] PSK demodulation of a sub-carrier sent over FM

2014-10-22 Thread madengr 
Raydel Abreu (CM2ESP) wrote
> However I would like to know how can I demodulate a PSK transmission which
> is carried over a typical FM signal.

IIRC you would just do the WBFM demod, then the PSK demod.  See the gr-rds:
https://github.com/bastibl/gr-rds

Lou




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[Discuss-gnuradio] PSK demodulation of a sub-carrier sent over FM

2014-10-22 Thread Raydel Abreu (CM2ESP) 
Hello,

I had experimented with simple PSK reception with GNU-Radio when the
carrier is directly phase modulated.

However I would like to know how can I demodulate a PSK transmission which
is carried over a typical FM signal.

Kind regards,

Raydel
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