MIMO雷达收发两级STAP原理与性能讨论

Discussion on the Principle and Performance of Transmitter-receiver-two-state MIMO Radar STAP

提出了一种基于多输人多输出雷达的收发两级空时自适应处理（STAP）算法。收发两级STAP与收发联合STAP不同在于：分别对等效发射端与接收端进行空时处理，从而达到降低运算量效果。文中给出收发两级STAP所构造的协方差矩阵与收发联合STAP协方差矩阵关系，并且给出输出信杂噪比（SCNR）表达式。从仿真结果看，收发两级法SCNR性能与收发联合STAP相近，且计算量有明显降低。此外，收发两级STAP也可应用到收发联合降维算法中，得到与收发联合降维算法一样的性能，且运算量进一步降低。

A transmitter-receiver-two-stage space time adaptive processing （STAPI for multiple input multiple output （MIMO} radar is proposed in this paper. The different between transmitter-receiver-two-stage STAP and transmitter-receiver-joint STAP is that solving equivalent transmitters and receiver data respectively, in order to reduce the amount of computation. A relationship between two-stage STAP covariance and joint STAP is given, and an analytical expression for signal-clutter-noise ratio （ SCNR} is derived in this paper. From simulation results, the two-stage STAP has a similar performance with transmitter-receiver-joint STAP, and reduces computation. Furthermore, the two-step STAP can be used in the traditional reduced dimension algorithms to obtain less calculation.