基于优化多相编码和天线设计的MIMO STAP研究

多发多收（MIMO，multiple input and multiple output）雷达发射正交波形以获得良好的波形分集增益和更高的自由度。为了提高信号的自相关和互相关性能，采用循环算法（CA，cyclic algorithm），得到了具有低自相关旁瓣峰值（ASP，auto correlation sidelobe peak）和互相关峰值（CP，cross correlation peak）的多相编码信号。仿真实验基于优化多相编码信号和天线阵列结构实现STAP（space-time adaptive processing），克服了多信号间相互影响、稀疏天线布阵结构导致的盲速和密布天线布阵影响孔径大小等问题，验证了本文方法有效性。

Research on MIMO STAP Based on Optimized Poly-phase Codes and Array Design

A MIMO radar can achieve waveform diversity advantage and higher degrees of freedom via transmitting orthogonal waveforms. To enhance the performance of auto-correlation and cross-correlation of transmitted coeds, Cyclic Algorithm is used to optimize a set of poly-phase codes with low ASP and low CP. Optimized poly-phase codes and array structure design are proposed to solve the problems such as mutual interference caused by different codes, blind speed caused by sparse array structure and short aperture caused by dense array structure. Numerical experiments show that good STAP performance has been acquired and the efficiency of the research is demonstrated as well.