When are the MLSD respectively the matched filter receiver optimal with respect to the BER?
We reconsider the minimum/optimal bit-error probability receiver (OBER) for intersymbol interference channels with Gaussian noise and the reception of finite b1oc:ks of bits. We view the OBER as a function with two inputs: the received sequence and an expected signalto- noise ratio; and one output: the estimated block of bits. Assuming that all sequences are equally probable to be t.ransmitted we