I have got the idea with my classmates.Sorry for disturb.Thanks.
2015-11-12 16:59 GMT+08:00 w xd <[email protected]>:
> Hi all,
>
> I have looked at the code of ofdm_frame_equalizer_vcvc_impl.cc
> and I have a question about it.Thank you in advance.
>
>
> To the payload route:
>
> The frame_len for example is 9.I think we should shift all the 9
> symbols respectively.To the below source gnuradio code,it have shifted all
> the frame_len*d_fft_len in one time.
>
> I think maybe it should like this:
>
> for(int i=1;i<=9;i++)
> {
> shift_symbol(i)
> }
> ....
>
>
>
>
> // Copy the frame and the channel state vector such that the
> symbols are shifted to the correct position
> if (carrier_offset < 0) {
> memset((void *) out, 0x00, sizeof(gr_complex) * (-carrier_offset));
> memcpy(
> (void *) &out[-carrier_offset], (void *) in,
> sizeof(gr_complex) * (d_fft_len * frame_len + carrier_offset)
> );
> } else {
> memset((void *) (out + d_fft_len * frame_len - carrier_offset), 0x00,
> sizeof(gr_complex) * carrier_offset);
> memcpy(
> (void *) out, (void *) (in+carrier_offset),
> sizeof(gr_complex) * (d_fft_len * frame_len - carrier_offset)
> );
> }
>
> Thank you so much.
>
> Best regards,
> xd
>
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