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This paper is concerned with an analysis of the back scattering of an electromagnetic wave by a target moving along just above a random rough surface such as desert, hilly terrain, sea surface and so on. First we introduce the discrete ray tracing method (DRTM) for the field analysis of back scattering. Second we investigate the effect of clutter due to back scattering from the random rough surface...
An modified estimation algorithm for radio communication distance along random rough surfaces (RRS) is proposed in this paper. RRSs are generated by the convolution method, and its density functions are selected Gaussian, n-th order power law and exponential spectrum. First, electromagnetic fields are calculated numerically by using the Discrete Ray-Tracing Method (DRTM). Next, the conventional estimation...
This paper is concerned with an algorithm for generating inhomogeneous random rough surface (RRS) that can simulate physical environments such as desert, vegetation ground, sea surface and others, better than homogeneous RRS. First, we discuss statistics of RRS and the direct DFT method which can generate RRS with an arbitrary types of spectrum. Second, we review the essence of the convolution method...
This paper is concerned with the estimation of radio communication distance for wireless sensor networks when both the transmitters and receivers are arbitrarily distributed on a random rough surface such as desert, vegetation ground, sea surface and so on. First, we simulate electromagnetic wave propagation along the rough surface by using the discrete ray tracing method (DRTM). Second, we determine...
Discrete ray tracing method (DRTM) is applied to numerically analyze electromagnetic wave propagation along random rough surfaces. In the DRTM analysis, we make some assumptions in order to simplify the ray searching algorithm as well as to save computation time. First we discretize the rough surface in terms of linear piece wise edges (1D), and second we determine whether the two edges are on the...
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