浅海信道单水听器多径被动定位

【作者】 陈励军； 张俊； 安良； 高翔； 张学峰；

【机构】 东南大学教育部水声信号处理重点实验室； 中国人民解放军91388部队；

【摘要】 本文研究浅海信道中单水听器被动定位方法。论文推导了零梯度下的测距测深公式,采用Bellhop模型对负梯度水声信道多径时延进行了仿真计算,分析了声速垂直负梯度对测距性能的影响。通过海上试验,对单水听器被动定位算法进行了实际验证,从单水听器接收信号的倒谱历程图中成功提取了实际信道的海面海底反射时延。利用本文的方法对海上数据处理结果表明,定位结果与目标声源的GPS值非常接近,由信道负梯度造成的测量偏差情况与数值仿真结果基本一致。更多还原

【Abstract】 In this paper a passive localization method using one single hydrophone is analyzed.Range and depth formula are derived.The multipath time-delay in shallow sea which has a negative sound speed gradient is simulated and the localization departure caused by negative gradient is discussed.The localization algorithm is examined by sea trial.The multipath time-delay of the real channel is estimated successfully from cepstrogram of single hydrophone signal.The results obtained with the method in this paper for data collected during the sea trial are very close to source GPS value,and the departure caused by negative gradient is basically consistent with the simulated rusults.更多还原