Re: [Discuss-gnuradio] Questions about synchronization and modulation in benchmark

[Timothy Lawrence Sitorus]

Hi Adib

Thanks for the reply.

I check it in the net and download it. I don't know about costas loop and clock recovery in detail. may I know how they they estimate frequency offset, and recover it?
as far as I know,  they are using gr.quadrature_demod_cf(1) & and subtract it using gr.single_pole_iif_filter_ff(alpha) for frequency offset?is it right?

Tim

On Sun, Jan 31, 2010 at 4:03 PM, adib_sairi <address@hidden> wrote:

there is some work from Thomas Schmid which modulate and demodulate O-QPSK
which mean for IEEE802.15.4 standard.. you can search and download the code
online. good luck..

Adib

Timothy Lawrence Sitorus wrote:
>
> HI all,
>
> Please anyone help me.
>
> Is there anyone succeeded to modulate qpsk, even frequency offset occurs?
>
>
> Best Regards,
> Tim
>

> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>

--
View this message in context: http://old.nabble.com/Questions-about-synchronization-and-modulation-in-benchmark-tp27371719p27390702.html
Sent from the GnuRadio mailing list archive at Nabble.com.



_______________________________________________
Discuss-gnuradio mailing list
address@hidden
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio