多通道雷达成像与DOA外场试验研究

Research on field experiment of MIMO radar imaging and DOA

多输入多输出(multiple-input multiple-output,MIMO)技术用于多通道雷达,可以扩展阵列孔径,提高系统分辨力。证明了一个发射阵元和一个接收阵元通过分时移位模拟MIMO雷达工作状态的可行性,提出以一发一收构建一套MIMO雷达试验系统。给出了系统搭建原理和测量方法,设计了实孔径阵列和等效阵列外场试验,结果表明,阵列孔径得到了扩展,成像与DOA估计的分辨力得到了提高。

MIMO technology having been applied,the multichannel radar can extend the array aperture and improve the performance of resolution.This paper shows that an MIMO radar may be simulated through the time-sharing motions of a single transmitter and a single receiver,and an MIMO radar simulated experimental system is constructed by a single transmitter and a single receiver.The constructed principle and measures are given.Finally,the experiment using real array and equivalent array shows the array virtual aperture is expanded,and the resolution of both imaging and DOA estimation is improved.