you might have a look at the frequency response, in particular the most
negative / positive frequency.
What happens to a sample stream [-1, 1, -1, 1, -1, 1, ...] when you run it
through Proakis B channel? Can the equalizer compensate? What happens if
you offset one of the coefficients slightly?

-mn

Hello 

I am trying to implement LMS and DFE equaliser for Proakis Channels. But I
am not able to get exact BER plots. If I remove the precursor of Channle B
and and implement the random channel e.g. [0.815 0.407 0.2] instead of
[0.407 0.815 0.407], I am getting good BER but not for exact Channel B.

Please help me in this respect.

Thanks

Chintan