Re: [Discuss-gnuradio] digital_ofdm_equalizer_simpledfe::equalize

[Martin Braun (CEL)]

On Tue, Aug 27, 2013 at 09:28:44AM +0200, Stefano Banti wrote:
> Hi all,
> the above method in gnuradio 3.6.5.1 and 3.7.0 seems to have an error, shown
> below:
> 
> if (...){
> }
> else {
>         sym_eq = frame[i*d_fft_len+k] / d_channel_state[k];
>         d_constellation->map_to_points(d_constellation->decision_maker(&
> sym_eq), &sym_est);
>         d_channel_state[k] = d_alpha * d_channel_state[k] + frame
> [i*d_fft_len+k] / sym_est;
>         frame[i*d_fft_len+k] = sym_est;
> }
> 
> but it should be:         d_channel_state[k] = d_alpha * d_channel_state[k] +
> (1-d_alpha)* frame[i*d_fft_len+k] / sym_est;

Hi Stefano,

looks like you're right. Will fix this.

MB

-- 
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