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Re: [Discuss-gnuradio] Modulation order of FSK


From: Ron Economos
Subject: Re: [Discuss-gnuradio] Modulation order of FSK
Date: Wed, 1 May 2019 14:44:59 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1

Here's a flow graph that I created when I was fooling around with C4FM.

Ron

On 5/1/19 14:27, Batu Kaplan wrote:
Thanks for advice Ron. 

What should I do for getting M-FSK signal after the Chunks to Symbols block output?

Yours Sincerely.

Batu Kaplan <address@hidden>, 26 Nis 2019 Cum, 16:46 tarihinde şunu yazdı:
Dear Marcus,

Thanks for your response. First of all, it is been a while for answering your response and I am sorry about that. I could not try your solution until these days. Unfortunately, I still couldn't get over my problem on M-FSK modulation. When I try your solution, "bits to symbols and after that using frequency modulator", I managed to convert bits to integers using the packed to unpacked block. However, after subtracting data from 1.5(for M=4), that point I am stuck. Using frequency modulator will make an FSK modulated signal? 

If you can still help, I will be appreciated. Thanks in advance.

Yours sincerely. 



Müller, Marcus (CEL) <address@hidden>, 6 Mar 2019 Çar, 23:13 tarihinde şunu yazdı:
Really quickly, I need to get going:
with unpacked-to-packed (or vice versa) you can convert your bit stream
to integers between 0 and 3. Convert to float, subtract 1.5, use with
frequency modulator?

Best regards,
Marcus
On Wed, 2019-03-06 at 18:14 +0300, Batu Kaplan wrote:
> Hello, Marcus.
> First of all, I'm very grateful for your answer. But how I can make a
> connection between the bits and the "baseband frequency values" that
> you mentioned in the mail?
> For example, I have a 000110 bit series for 4FSK. And then, I think I
> need to pack into 2 bits like 00-01-10. But then how can I turn the
> bits to appropriate form for implement the frequency modulation
> block? After that, am I going to apply to the frequency modulation
> block for each group of symbols? Can you share a flow chart for
> understand better? like file txt ---> packed --->frequency mod ---->
> sink.
>
>  Yours sincerely.
> -Batuhan Kaplan
>
> Batu Kaplan <address@hidden>, 5 Mar 2019 Sal, 12:09 tarihinde
> şunu yazdı:
> > Hello, Marcus.
> > First of all, I'm very grateful for your answer. But how I can make
> > a connection between the bits and the "baseband frequency values"
> > that you mentioned in the mail?
> > For example, I have 000110 bit series for 4FSK. And then, I think I
> > need to pack into 2 bits like 00-01-10. But then how can I turn the
> > bits to appropriate form for implement the frequency modulation
> > block? After that, am I going to apply to the frequency modulation
> > block for each group of symbols? Can you share a flow chart for us
> > to understand better? like file txt ---> packed ---> frequency mod
> > ----> sink.
> >
> >  Yours sincerely.
> > -Batuhan Kaplan
> >
> > Müller, Marcus (CEL) <address@hidden>, 1 Mar 2019 Cum, 21:42
> > tarihinde şunu yazdı:
> > > Hi Batu,
> > >
> > > a really intuitive way of implementing FSKs is to convert your
> > > bit
> > > groups to baseband frequency values (e.g. -1.5, -0.5, 0.5, 1.5)
> > > and use
> > > them with the frequency mod block.
> > >
> > > Best regards,
> > > Marcus
> > >
> > > Marcus
> > >
> > > On Fri, 2019-03-01 at 16:59 +0300, Batu Kaplan wrote:
> > > > I am implementing the binary FSK with GFSK block and I think it
> > > is working correctly. For the next step I want to increase my
> > > modulation order of FSK modulation, like 4-FSK and 8-FSK,
> > > however, I could not move forward from the file source block. How
> > > can I implement the 4-FSK and 8-FSK on GNURadio?
>
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

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