Theoritical Performance of Binary Coherant PSK on AM SCA Channels

The performance of binary coherent PSK modulation when used for low speed signalling on AM broadcast carriers is evaluated. The analysis considers channel degradation resulting from constant amplitude interference with additive gaussian noise and with atmospheric noise. Phase deviations of ±90, ±57, and ±35 degrees are considered. Curves of error rate performance versus carrier-to-noise (CNR) and carrier-to-interference (CIR) ratios are presented. Approximations for extending the results to practical nighttime reception conditions with multiple interference sources are offered.