A Mobile-to-Mobile Fading Channel Simulator Based on an Orthogonal Expansion

This paper presents a Rayleigh fading mobile-to- mobile channel simulator based on a modified Karhunen-Loeve orthogonal expansion of a complex Gaussian fading process. The method is similar to the well-known IFFT method but with a different frequency mask. The simulation accuracy is assessed by the computation of power margins (for the autocorrelation) and of Kullback-Leibler divergence (for the envelope probability density function) of the simulated fading process. The results demonstrate a good agreement with the theory and a slight improvement relative to the IFFT method.