A Performance Monitoring Scheme for FSK Transmission over Fading Channels

A scheme for monitoring performance of a frequency-shift-keyed (FSK) transmission over a selectively fading channel with a nonfading component is treated. The design of the monitoring scheme is based heavily on the assumption that the received signal and additive noise are Gaussian. The monitoring requires no special test signal. An asymptotically unbiased estimate of error probability is obtained in terms of four measurements of the received signal. The measurement time required for a reliable estimate of error probability is determined.