OPTIMUM PULSE TRANSMISSIONS FOR MULTIPATH CHANNELS

摘要

The problem of modulation and demodulation techniques for communicating through fluctuating multipath channels has been considered in rather general terms by several authors. In this report the performance of an incoherent Mary communication system operating via a fluctuating multipath channel is computed under very restrictive conditions on the channel behavior, namely, that the received signal consists of resolvable, independ¬ently Rayleigh fading paths each of which has been corrupted additively by independent gaussian noise. Probability of error expressions are given for the Mary receiver which are generalizations of results obtained earlier by Turin, Hahn, and Pierce. From these expressions the optimum time duration for pulse transmissions is computed for two channels the orbital dipole channel and the moon.