Re: [Discuss-gnuradio] header_payload_demux

[Martin Braun]

On 30.05.2014 03:28, xianda wrote:
> Hi<br/>     Thanks for your kindly reply.<br/>     1.The second
> question is:I see the fft block,it has one option:shift,and you set
> yes.<br/>     And in the transmit part,we should do the ifft.And in
> the receive part,we should do the fft.<br/>     They all set the
> shift:yes.<br/>     And now I want to save the data to file and
> analyse the data by matlab.<br/>     In the transmit maybe
> ifft(fftshift(symbol)),but in the receive what command?<br/>     2.I
> see maybe you don't use the pilot in the receive part.Am I
> right?<br/>     3.I see maybe the cyclic prefix is dropped in the
> header_payload_demux block.Am I right?<br/>     Thank you.Can you
> explain it?Thank you.<br/>Best regards At 2014-05-30 05:05:54,


Xianda,

sorry, I still have troubles understanding your question. It depends on 
where in the flow graph you're actually saving the file. If shift is set 
to yes, the output is shifted, or the input is regarded as shifted.

M