Two-frequency mutual coherence function and its applications to pulse scattering by random rough surface |
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Authors: | Ren YuChao Guo LiXin |
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Institution: | (1) School of Science, Xidian University, Xi’an, 710071, China |
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Abstract: | An analytic expression of the two-frequency mutual coherence function (MCF) was derived for a two-dimensional random rough
surface. The scattered field was calculated by the Kirchhoff approximation, which is valid in the case that the radius of
curvature of the surface is much larger than the incident wave length. The scattering problem of narrowband pulse was investigated
to simplify the analytic expression of the two-frequency MCF. Numerical simulations show that the two-frequency MCF is greatly
dependent on the root-mean-square (RMS) height, while less dependent on the correlation length. The analytic solutions were
compared with the results of Monte Carlo simulation to assess the accuracy and computational efficiency.
Supported by the National Natural Science Foundation of China (Grant No. 60571058) and the National Defense Foundation of
China (Grant No. 51403020505DZ0111) |
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Keywords: | mutual coherence function pulse scattering random rough surface |
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