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Re: [Discuss-gnuradio] digital_ofdm_equalizer_simpledfe::equalize
From: |
Martin Braun (CEL) |
Subject: |
Re: [Discuss-gnuradio] digital_ofdm_equalizer_simpledfe::equalize |
Date: |
Tue, 27 Aug 2013 10:09:48 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
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
--
Karlsruhe Institute of Technology (KIT)
Communications Engineering Lab (CEL)
Dipl.-Ing. Martin Braun
Research Associate
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KIT -- University of the State of Baden-Württemberg and
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