Correction to 'CPSK Signaling over Hard Limited Channels in Additive Gaussian Noise and Intersymbol Interference'

We wish to thank Dr. N. A. Mathews of Chelsea College, London, England, for pointing out an error in the derivation of (21) in the above paper,’ when Mary (M>2) coherent phaseshift-keyed (CPSK) transmission is being considered. In the case of binary (M-2) transmission, the analysis of the paper leads to the correct results, but in the Mary case a somewhat different approach must be used to find the probability density function