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In this paper, a EM simulation modeling method for the two dimensional time varying sea surface microwave propagation is proposed. It is not only the electromagnetic simulation model, but also is a statistical analysis model of rough sea surface channel. Firstly, PM spectrum, Fourier transformation and Creamer transformation are adoped together to build typical linear and nonlinear sea surface models...
Technology of modern communication and channel estimation cannot be separated from the research on electromagnetic problems of the sea surface. Considering the cost and other factors, the electromagnetic simulation method is a very valuable research project. FDTD method can be applied to various electromagnetic problems very well, but when dealing with electrically large problems, there will be a...
The echo scattered from a slow-moving weak target on sea surface is nonstationary due to the influence of waves. Time–frequency distributions are good tools to analyze it. In this paper, we propose a method for detecting slow-moving weak targets in sea clutter, which is based on time–frequency iteration decomposition. This method consists of three stages. First, we present a fast signal synthesis...
This paper deals with modeling the GPR response from usual road diseases by the software tool called GprMax and presents the automatic identification of these disease responses. There are totally six kinds of road diseases being modeled, such as surface crack, base crack, base replacement, base breaking, void, ea al. Simulation results show that a 900MHz antenna has good detecting capability to such...
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