Discrete realization for receivers detecting signals over random dispersive channels. Part II: Doppler-spread channel

We propose a new suboptimal receiver for detecting signals transmitted over random doppler-spread channels. We discuss in particular the first order channel and a transmitted signal of a constant envelope. The proposed receiver is composed of an integrator, a sampler and a quadratic filter. We give numerical results concerning the performances of this receiver. In particular, we give the evolution of error probability versus the number of samples (or sampling rate). We show the important role of the ratio of signal duration to channel coherence time and we suggest how to choose the transmitted signal duration and the sampling rate for a given signal to noise ratio.