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, "Martin Braun" <martin.br...@ettus.com> wrote:
>On 05/29/2014 08:07 PM, xianda wrote:
>> Hi:
>> Thank you in advance.
>> I have two simple question:
>> 1.In the grc,i see a block: header_payload_demux
>> It has 3 input:in,trigger,header_data.But i see
>> the header_payload_demux_impl.cc:iosignature::make2(1,2,..,..).But it
>> has 3 input,why?
>
>Why 3 inputs or how come only 2 are in the io signature?
>header_data is a message port, I guess that's what you're after.
>
>> Thank you.
>> 2.fft:I see the shift:yes.
>> I want to save the symbol to file sink and analyse by matlab.But
>> now i don't know it's shift earlier or fft earlier?
>
>Can you rephrase that question?
>
>M
>
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