The effect of band-limiting of a PCM/NRZ signal on the bit-error probability using a sample detector

The expression for the intersymbol interference as a function of bandwidth-bit duration product for pulse code modulation/non-return to zero systems operating in a band-limited channel is determined for the band limit and sample detector. It is shown that the optimum bandwidth of the detector is 0.9 of the bit rate. The average probability of bit-error is computed for various bandwidths.