Thread Subject:

Urgent Help, Adaptive Equalizer in Simulink

Hi Everbody,
My problem is cancelling ISI at the Receiver by using Adaptive Equalizer(Decision Feedback Equalizer)
I have a problem with Simulink Communication Toolbox. By using simulink communication toolbox I set up a baseband model Bernoulli Data Source=>QPSK Modulator=>Multipath Rayleigh Fading=>AWG=>LMS(DFE)Equalizer=>QPSK Demodulator.
when I ran model I took the below results,
*When there is no delay(no multipath) and no Equalizer the BER of the simulation is acceptable
*When there is 2e-8 delay(with ISI) and Equalizer I have a 0.5 BER so which is unacceptable.Let's get summurize it my problem is setting correct Equalizer settings and removing the ISI and better BER(acceptable)
I have the simulink model and send it who want to solve my problem and I will support with extra information.
I need urgent help,
Please contact with me.
Best Wishes

"Musa " <baltalyus2004@yahoo.com> wrote in message <i05nbp$4q$1@fred.mathworks.com>...
> Hi Everbody,
> My problem is cancelling ISI at the Receiver by using Adaptive Equalizer(Decision Feedback Equalizer)
> I have a problem with Simulink Communication Toolbox. By using simulink communication toolbox I set up a baseband model Bernoulli Data Source=>QPSK Modulator=>Multipath Rayleigh Fading=>AWG=>LMS(DFE)Equalizer=>QPSK Demodulator.
> when I ran model I took the below results,
> *When there is no delay(no multipath) and no Equalizer the BER of the simulation is acceptable
> *When there is 2e-8 delay(with ISI) and Equalizer I have a 0.5 BER so which is unacceptable.Let's get summurize it my problem is setting correct Equalizer settings and removing the ISI and better BER(acceptable)
> I have the simulink model and send it who want to solve my problem and I will support with extra information.
> I need urgent help,
> Please contact with me.
> Best Wishes


Is there nobody to help me about this problem? :(

i m also working on the very same problem u have discussed i think we both might be helpful to each other here is my mail id u can contact me on this <lovesangha@yahoo.com>