Wideband Troposcatter Radio Channel Simulator

A versatile troposcatter simulator has been built which can produce radio channels exhibiting frequency fiat or frequency selective fading over a band greater than l0 MHz and centered at 70 MHz. Frequency selective channels with Rayleigh or other fading are available with controllable cross-correlation of the multipath components. In addition, multiple diversity channels with controllable cross-correlations are provided. A method of estimating the delay and attenuation values for modeling a particular path in terms of intermodulation and thermal noise in an FDM-FM system is described. The actual path measurements and the simulated path measurements are shown to be in reasonably good agreement.