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测距是声呐系统的主要功能之一,测距的精度在某些应用方面显得十分重要,本文从CDW-A型定位声响中使用的具体系统出发,导出了在白噪声背景影响下的测距统计误差的方差,并利用近似方法导出了白噪声通过此系统后的统计分布。同时对影响测距精度的一些参数进行了分析,提出了改善测距精度,减小测距误差的方法,为本系统的设计提供了理论依据。
Ranging is one of the main functions of sonar system. Ranging accuracy is very important in some applications. Based on the specific system used in CDW-A positioning sound system, this paper derives the ranging under the influence of white noise background Statistical error variance, and the approximate method is used to derive the statistical distribution of white noise after passing through the system. At the same time, some parameters that affect the accuracy of ranging are analyzed. The methods to improve the accuracy of ranging and reduce the ranging error are provided, which provide the theoretical basis for the design of the system.