An Error-Probability Upper Bound for Coherent Phase-Shift Keying with Peak-Limited Interference

An upper bound on the probability of error for coherent phase-shift-keyed (CPSK) systems operating in the presence of peaklimited interference is derived. Such a bound is particularly useful in analyzing the effect of co-channel and adjacent channel interference on CPSK systems. The bound is often tight enough to be employed as a system design tool, and is computationally simple to apply.