关键词: 几何圆盘散射模型, 水声通信, 到达时间, 到达角, 发射角

Abstract:

For underwater wireless communication scenario, a disk scattering model which is closer to the actual environment is introduced. Assuming that the local scatterers are distributed within a disk centered on the receiver（Rx）. The scatterers are in a higher concentration around the disk center and a lower concentration far from it. Polar coordinates are used to model the distribution of the scatterers which result in the simplicity of computational complexity. Furthermore, closed-form expressions for the joint density function（PDF） of the time-of-arrival（TOA） and angle-of-arrival（AOA） have been derived, as well as for the joint PDF of the angle of departure（AOD） and AOA. From the joint distributions, the marginal PDFs of the TOA, AOA, and AOD are derived. Finally, the average delay and the delay spread of the proposed disk scattering model are analyzed. Based on the above research results, it provides an important channel model tool for underwater acoustic systems analysis.

Key words: geometrical disk scattering model, underwater acoustic communication, time of arrival, angle of arrival, angle of departure