Re: [Discuss-gnuradio] Possiblity of Modulation without the usrp? PSK modulator?

[w w]

Yufeng,

Yes, I'm still looking at setting up BPSK, QPSK and 8PSK.  I was however able to TX and RX DPSK and GMSK without the USRP.  

 

However,  I was wondering if you had the history of TX of PSK with GNUradio.   In the past there was a block named BPSK.py but now it is not there.  It seemed very similar to the Digital BERT example using a costas loop and MM clock recovery. Then there is a MPSK receiver that was added there after.   It seemed to me like the natural progression was to add a MPSK transmitter or better yet hold to the schema with DPSK,GMSK and QAM and have a MPSK Mod and a MPSK Demod.   Do you know why BPSK.py dissappeared and it was not replaced with a MPSK transmitter or MPSK Mod?  

 

I took a look at PSK.py and got confused because it seemed to only deal with Gray coding only.....what am I missing?

 

Cheers,

Jody

On Wed, Mar 25, 2009 at 11:27 AM, yufeng wang <address@hidden> wrote:

Hi, Jody,

This is Yufeng. I was also working on modulating a data sequence with
PSK(or QAM) modulation, and then transmitting with USRP. Have you been
able to find how to modulate a signal with PSK?

On Tue, Mar 10, 2009 at 9:31 AM, w w <address@hidden> wrote:
> Greetings,
> I'm wondering if you all could tell me if it is possible to set up and
> modulate a signal without the usrp?   If so how do you insert the carrier?
> For a BPSK siganl do you just multiply carrier by the modulated signal?   I
> also notice that gnuradio did at one time have a PSK modulator but it is no
> longer available.....what took it's place?   Without a PSK modulator, how do
> you  modulate signals like BPSK, QPSK, 8PSK.?
>
> Thanks,
> Jody

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--
Best wishes,

Yufeng