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中文摘要：
根据基于时延估计的多基地航空搜潜系统中目标、各被动浮标之间空间上的几何位置关系,建立目标位置的数学模型,确立了目标空间位置与声传播信号到各被动浮标的时延、布阵间距、声速之间的关系;在此基础上,根据时延估计方差的克拉莫-罗下限,分析信号信噪比、接收机带宽、信号中心频率及观测时间等参量测量误差对时延估计的影响,进而分析了各参量误差对目标定位误差影响,最后对所建模型及误差进行了仿真分析。
英文摘要：
According to the space geometry site relationship between passive buoys and target in multi-base aviation searching submarine system based on time delay, the target site mathematical model is established, and the relationship between target site and time delays of acoustic signal transmitting to passive buoys, deployed distance and acoustic speed is built. On this basis, the effect of SNR, receiver bandwidth, signal center frequency and observation time on time delay estimation according to Cramer-Rao bound of time delay variance is analyzed, and the effect of these parameters on target localization error is analyzed further. Finally, simulation is done to analyze the established localization and error models.
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