SOC水声信道模型及其计算方法研究

Research on Underwater Acoustic Channel Model and Its Calculation Method Based on SOC

对水下声波通信环境中的无线传播信道直达与非直达环境进行研究,引入几何参考模型,设计出相关模型。假设在三维水下空间的一个二维竖直横截面上均匀分布着数量无限的散射体,文中推导了水声信号到达角的概率密度函数、时间自相关函数以及多普勒功率谱密度的表达式,并分析了其几项主要参数对信道统计特性的影响。文中根据假设的参考模型提出了SOC(Sum of Cisoids)水声信道模型,以及所需参数的两种有效计算方法,并对二者的性能进行了比较。该研究拓宽了水下无线信道建模的研究方向,并且很大程度地减少了数值计算开支,降低了模型的设计与仿真的复杂度。

In this paper,the line-of-sight and no-line-of-sight environment of wireless communication channel in underwater acoustic communication environment was studied.A geometric reference model was introduced and related models were designed.Assuming that an unlimited number of scatterers are uniformly distributed on a two-dimensional vertical cross section in 3D underwater space,this paper deduced the signal arriving time probability density function,time autocorrelation function and the expression of Doppler power spectral density,and analyzed the influence of several main parameters on the channel statistics.According to the assumed reference model,the Sum of Cisoids（SOC）underwater acoustic channel model and two effective calculation methods for the required parameters were proposed,and their performance was compared.The research broadens the research direction of underwater wireless channel modeling,greatly reduces the computational cost,and reduces the complexity of design and simulation of model.