Coded octal PSK system performance disturbed by imperfect recovered phase reference

Using the theoretical analysis and computer simulation, the coded 8PSK system performance when disturbed by the recovered carrier phase error and jitter, is investigated. The general equation of the bit error probability is derived as a function of the phase error. The asymptotic coding gain and the asymptotic equivalent CN ratio degradation are discussed, and a simple method for calculating the latter is presented. The equations are calculated numerically and the results provide insight into the property of the coded 8PSK system of the direct phase mapping type.