MMSE for OFDM or MC-CDMA

[dodohoo]

mmse for ofdm

Hello! Every One!

I'm looking for MMSE equalizer matlab code for OFDM or MC-CDMA. In fact, I don't know how to get the w(k,t) by the channel coefficient h. Of course, there are equations, but did h need the FFT transform? and how the w(k,t) affect the receiving data? only a simply multiplication?

Thank you in advance!

 

[jessi]

Simply put, the MMSE equalizer coefficients are given as w(k,t)=H*(k,t)/(sqr(|H(k,t)|)+1/SNR).
As SNR increases, MMSE criterion converges to zero-forcing one. In the above equation, H(k,t) is the DFT of h. So, you have to take the DFT of channel gains.
hope that helps