CAJ | 학술논문

在水平不变海洋声道中,基于声源和接收器运动情况下窄带脉冲声传播表达式,导出了收发合置声呐在水平运动情况下的海底混响信号模型.针对模型仿真,提出了一种基于距离-方位角单元结构的混响时间序列仿真方法,该方法能够有效解决时延一多普勒单元内不同模态简正波相关散射系数难以表达的问题,并且实现了任意单元的时延一多普勒间隔小于额定分辨率.仿真结果的功率谱及概率密度分布情况显示了建模及仿真方法的有效性.
재수평불변해양성도중,기우성원화접수기운동정황하착대맥충성전파표체식,도출료수발합치성눌재수평운동정황하적해저혼향신호모형.침대모형방진,제출료일충기우거리-방위각단원결구적혼향시간서렬방진방법,해방법능구유효해결시연일다보륵단원내불동모태간정파상관산사계수난이표체적문제,병차실현료임의단원적시연일다보륵간격소우액정분변솔.방진결과적공솔보급개솔밀도분포정황현시료건모급방진방법적유효성.
Based on the representation of impulsive sound propagation with the moving source and reciver, a seafloor reverberation signal model is derived from the monostatic sonar moving horizontally in horizontally stratified oceans. Then, a method for simulating reverberation time series is presented with the seafloor divided into range-azimuth cell. It is found that the method can effectively solve the problem that correlated scatter coefficient between different normal modes is difficult to be expressed, and the delay-doppler distance for any cell is less than rated resolution. The power spectrum and the probability density of simulation results show the validity of the model- ing and simulation method.