BER vs SNR under BPSK bandlimited channel

Hi
I have done some work with BPSK modulation such modulating and
demodulating the waveform and plotting the BER vs SNR under BPSK for AWGN
channel. However I wonder how would I perform the simulation if the
channel is bandlimited meaining that assume frequency response of channel
is w/(w^3+w^2+w+1) then how to do demodulation and eventually finding the
bit-error ?

Thanks.


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chess <106766@DSPRelated> wrote:

>I have done some work with BPSK modulation such modulating and
>demodulating the waveform and plotting the BER vs SNR under BPSK for AWGN
>channel. However I wonder how would I perform the simulation if the
>channel is bandlimited meaining that assume frequency response of channel
>is w/(w^3+w^2+w+1) then how to do demodulation and eventually finding the
>bit-error ?

Probably the best approach is to use an Forney equalizer programmed 
with a truncated version of the impulse response of the above IIR
filter.

Most other approaches (matched filter, decision-feedback equalizer)
will give you somewhat worse results, but depending on the extent
of the bandlimiting, the effect could be pretty mild.

Steve