Reply by sair...@gmail.com October 5, 20072007-10-05
Hi,
      I am capturing that effect by just using circular convolution
instead of linear convolution and sending the blocks (packets)
independent from each other.

Best Regards,
-SaiRamesh.

Reply by julius October 5, 20072007-10-05
On Oct 4, 10:26 am, "sairam...@gmail.com" <nammisairam...@gmail.com>
wrote:
> Hello, > I am doing simulation studies for frequency and time domain > equalization. From the complexit point of view I completely agreed to > the fact that frequency domain is better in the number of > multiplications/additions. Regarding the performance (BER ) point of > view I can see there is a large 3-4 dB gap between time and domain > equalization.i.e. time domain equalizer is performing better. I am > not sure this result makes sense. Can anyone please clarify this. > My simulation parameters are as follows: > For time domain equalization I am using 31 tap MMSE filter > > For requency domain equalization I am using 128 point DFT. > > My channel impulse response is modeled as tapped delay line with 3 - > tap Rayleigh channel with delay profile equal to that of Proakis > channel B. > > Best Regards, > -SaiRamesh.
Did you use a cyclic prefix that is long enough to contain sufficient channel energy spread? Julius
Reply by sair...@gmail.com October 4, 20072007-10-04
Hello,
           I am doing simulation studies for frequency and time domain
equalization. From the complexit point of view I completely agreed to
the fact that frequency domain is better in the number of
multiplications/additions. Regarding the performance (BER ) point of
view I can see there is a large 3-4 dB gap between time and domain
equalization.i.e. time domain   equalizer is performing better. I am
not sure this result makes sense. Can anyone please clarify this.
My simulation parameters are as follows:
For time domain equalization I am using 31 tap MMSE filter

For requency domain equalization I am using 128 point DFT.

My channel impulse response is modeled as tapped delay line with 3 -
tap Rayleigh channel with  delay profile equal to that of Proakis
channel B.

Best Regards,
-SaiRamesh.