Comparison of PSK vs FSK and PSK-AM vs FSK-AM Binary-Coded Transmission Systems

The performance of phase shift keyed (PSK), frequency shift keyed (FSK), PSK amplitude modulation (PSK-AM), and FSK amplitude modulation (FSK-AM), systems are compared for binary coded transmission in the presence of additive white Gaussian noise. This performance is based on the relative probability of error, operating range, required system bandwidth, and system frequency instability. The important subjects of improvement thresholds, some aspects of statistical decision theory, and channel characterization are briefly discussed.