本文研究相控阵雷达中的重复录取现象和为消除这种现象所采用的观测数据预处理方法．首先研究了出现重复观测的概率随信噪比和波位间距等参数变化的规律．而后在重复观测预处理算法中引入最大合并数和合并距离的先验信息，以减小错误合并概率．最后，研究合并前后的观测误差．比较了这种合并方法与不加任何约束合并算法的性能 This paper studies the phenomenon of repeated admission in phased array radar and pretreatment of observation data to eliminate this phenomenon. First of all, we study the law of probability of repeated observation with parameters such as signal-to-noise ratio and spacing of wave-bits. Then, prior information of the maximum merger number and the merge distance is introduced into the repeated observation preprocessing algorithm to reduce the error mergence probability. Finally, the observation error before and after the merger. The merging method is compared with that without any constrained merging algorithm