Bounds on the Spectra of Angle-Modulated Waves

The quantitative evaluation of the spectrum of anglemodulated waves is considered. Bounds are obtained by exploiting the similarity of a spectrum to a probability density and by making use of the known bounds on the tails of probability distributions. This approach applies to cases of modulation by Gaussian processes and some non-Gaussian processes. For a Gaussian modulation, a method is presented which achieves successively tighter results at the expense of increased computation.