Experimental Measurement of the Second-Order Interfrequency Correlation Function of the Random Surface Scatter Channel

A series of experiments have been performed designed to confirm recently published calculations of the Fresnel corrected interfrequency correlation function of the time varying rough surface scatter channel. The experiments were performed in a physical model facility using a wind driven water surface. Preemphasized pulse probing was used to extract instantaneous transfer functions over a domain of 200 kHz-1.3 MHz. The results indicate good agreement with theory especially for large surface roughness and frequency domains higher than the cutoff of the coherent transfer function of the channel.