多发多收单通道阵列雷达系统

Multiple Input & Output Transceiving Array Radar System with Single Channel

为扩展现有单通道阵列雷达的阵列孔径,提出一种多发多收单通道阵列雷达系统。该系统由L个发射阵元与一个发射通道以及M个接收阵元与一个接收通道等构成,采用一个发射通道贯续接入各发射阵元进行馈电的方式形成时间分集的连续调频波发射信号,可对动目标的方位角、径向速度与初始距离进行估计。一个接收通道贯续接入各接收阵元进行采样;通过一定的阵元配置使由阵元位置引起的接收时延共有L.M种不同取值,即利用L+M个阵元最多可处理L.M-1个目标。理论分析与仿真实验证明了该系统的孔径扩展效果与估计性能。

To extend the aperture of existing active switch antenna array radar, a switch antenna transeeiving array system was proposed. The proposed system composed of L transmitting antennas, a single transmitting channel, M receiving antennas and a single receiving channel to estimate azimuth angle, velocity, and initial range of moving targets. The transmitting antennas were switched periodically to the single transmitting channel for the time-diversity FMCW pulse signal feed; the receiving antennas were switched periodically to the single receiving channel for signal sampling. There were different numerical values of L · Mcaused by the time-delay according to the locations of antennas through the given antennas collocation rule; accordingly （ L · M-1 ） targets could be processed simultaneously with （L ＋ M） antennas. The theoretical analysis and simulation results demonstrated that the proposed radar system was able to extend aperture.