Accession Number : AD0284651

Title :   ERROR PROBABILITIES FOR ADAPTIVE MULTICHANNEL RECEPTION OF BINARY SIGNALS

Corporate Author : MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s) : PRICE,ROBERT

Report Date : 23 JUL 1962

Pagination or Media Count : 1

Abstract : Exact solution is obtained for the error probability of an adaptive receiver that is part of a multichannel communication system over which binary data are conveyed. In the adaptive receiver, noisy measurements are made of presumably nonvarying channel signal strengths and phase shifts. The measurements are then applied to the signal processing in a manner that would be optimum if the measurements were perfect. Signaling in each channel is accomplished by means of a pair of equal-energy waveforms that are orthogonal or opposites, and all channels are affected by mutually independent white Gaussian noises of identical intensities. Several receiver options are available, among them quite arbitrary effective duration and location of the measurement time interval and choice of measurement implementation. One major conclusion is that the error probability does not depend directly on the signal strengths or phase shifts in the various channels, but instead is a function of the total average power received over all channels, exclusive of the noise. The error probability increases with the number of channels, provided that the system remains unchanged. A by-product of the analysis is the error expression for the special case of nonadaptive multichannel reception of nonorthogonal signals. (Author)

Descriptors :   *COMMUNICATION THEORY, *DATA TRANSMISSION SYSTEMS, *DIGITAL SYSTEMS, *ERRORS, *MULTIPLEXING, *PROBABILITY, *RADIO RECEIVERS, NOISE (RADIO), RADIO SIGNALS

Distribution Statement : APPROVED FOR PUBLIC RELEASE