A Time-Domain Approach to Computing Distortion of Linearly Filtered FM Signals

A digital time-domain method to calculate interchannel distortion of linearly filtered angle-modulated signals is described. The method can handle cases when a transmission medium produces large multipleechoes, or its frequency-domain characteristics can be approximated by a finite set of sinusoidal functions. Sums of sets of equally spaced sinusoids with random phases are used to simulate the baseband. Distortion is obtained by averaging the results of successive Monte Carlo trials.