Performance comparison of two suboptimum detection procedures in real environment

Two suboptimum detection procedures, one based on the binary matched filtering and the other based on the weighting of partial decisions, were introduced earlier into the literature as very suitable for the cost-effective microprocessor-based implementation of the medium-speed voice-band data modems. Previous analysis of these two detection procedures was limited to the case when only Gaussian noise is present in the communications system. Here, both procedures are treated comparatively under conditions typical of realistic applications. These conditions refer to the cases when Gaussian noise is combined with intersymbol interference or timing jitter. To provide a reference against which the new detection procedures can be evaluated, results known from the literature for the optimal detector are here utilised and are comparatively presented.