多/双基地雷达检测性能研究

Research on Detection Performance of Multi—Bistatic Radar System

本文利用分布式检测原理,研究了地理上分散的五个接收站同时监视空中某一雷达单元的检测性能,各接收站的信噪比各不相同,并可以一定的方式随机设定。提出了全系统之总虚警概率、总发现概率和各接收支路的虚警概率、发现概率及中央处理器判决策略之间的关系通式。绘制了全系统总检测概率特性曲线,并与单接收支路的检测概率特性曲线作了比较。结果表明,多站分布总检测性能明显地优于单站。

The Detection performance of a multi-bistatic radar system with 5 physically separated peripheral receivers receiving simultaneousl returms from the same radar cell in the air is investigated in the paper using the distributed radar aetection theory. Various signal to noise ratios for the 5 receivers independently and randomly set by a computer are employed for the study. The paper offers a set of general formulae for calculating the detection performance of the wnole system dealing with the relationship among the probabilities of overalland peripheral false alarm and detection as well as central processor combining strategy. Receiver operating characterisitics (ROC)of the multi-receiver system responding to different Ravleigh fading radar targets (model Swerling Ⅰ and Ⅱ)in terms of the proposed formulae are pictured and comnared with that the mono-receiver system. Results show that the detection performance of the multi-receiver system is obviously better than that of the mono-receiver system.