摘要
利用被动声呐的三元测距技术能对浅海水面非合作声源目标进行定位。针对浅海背景噪声强,目标信号稳定性差的特点,采取了预白化方法提高高频信号的利用率,从而提高互相关时延估计的稳定性,又使用后置筛选方法选出可信度高的定位结果,解决了浅海近距离定位中的稳定性问题。通过海上实验对定位方法的稳定性进行验证,并将被动定位轨迹与目标航行的GPS轨迹进行对比。结果表明,在浅海近距离的定位稳定性较高,定位精度可达到米的量级。
By using the three element ranging technique of passive sonar,the uncooperative noise target in shallow sea can be located.Because of strong background noise in shallow sea,the target signal is unstable.To make the estimation of time-delay more stable,the pre-whiting processing is used to enhance the effect of high-frequency components.By means of post processing,the reliable results are selected,and the problem on signal stability can be solved.The stability of this ranging technique is tested experimentally.Comparing the trace of passive ranging with GPS of the targets,the results show that this design has a good near range locating performance in shallow sea.
出处
《舰船科学技术》
2009年第10期29-32,共4页
Ship Science and Technology
关键词
被动定位
互相关
时延估计
预白化
后置处理
passive ranging
cross correlation
time delay estimation
pre-whiting
post processing
