一种级联结构的空时二维信号处理算法

A Cascaded Jammer and Clutter Cancellation Architecture of STAP

在研究R.K lemm博士的级联抑制噪声干扰和杂波算法以及旁瓣对消算法的基础上,针对噪声干扰和地杂波同时存在的情况,提出了一种采用旁瓣对消结构级联抑制干扰和杂波的算法。该算法首先利用相控阵天线合成一个辅助天线和多个主天线,多个主天线共用一个辅助天线,针对每一对主辅天线,采用旁瓣对消算法在空域抑制噪声干扰;然后对多个主天线的输出结合时域进行STAP(空时二维信号处理)抑制地杂波。并且证明了该级联结构等效于一种同时抑制干扰和杂波的结构。计算机仿真结果及性能分析验证了该算法能有效地抑制干扰和杂波,且与其他级联结构相比,所提出的结构更利于工程实现。

Based on analysis of the cascaded jammer and clutter cancellation from R. Klemm＇s book and side lobe canceller, a method first using the side lobe canceller to cancel jammers then using STAP to cancel the clutter is presented for the environment where jammer and clutter exist at the same time. First some main antennas and one auxiliary antenna are synthesized using phased array, the main antennas share the only one auxiliary antenna, then the side lobe canceller is used for canceling the jammer in the space for every pair of main and auxiliary antenna. After that STAP is used by those main antennas for suppressing the clutter. The method is proved to be equivalent to a structure of simultaneous jammer and clutter cancellation. Computer simulation results are given to illustrate the method＇s validity. Compared with other cascaded architectures, this structure is more engineering realizable.