Click comparison of digital and matched filter receivers

We applied the click theory of errors to determine the performance of a digital FM receiver. The receiver had binary orthogonal FSK modulation in a channel that had a single random-phase echo at the symbol duration. We use practical bandwidth assumptions to show that this error performance is identical to that calculated for a matched filter receiver. Numerical results show, for example, that an increase in signal-to-noise ratio of 10 dB is required to maintain a 10⁻⁴ error rate when an echo of half the signal power is added.