摘要：We present an analysis for evaluating the probability density
function (pdf) of the noise at the output of the frequency
demodulator. It is shown that the noise is non-Gaussian and that
for low to medium signal-to-noise power ratios, its pdf differs
very significantly from the Gaussian pdf commonly assumed in
simplified analysis. These results are very important for
analyzing the performance of the PCM/FM type of modulation schemes
used in telemetry systems as illustrated in the paper.
