基于主瓣杂波补偿的多约束直接数据域方法

Scheme Based on Mainlobe Clutter Compensation of Multiple Constrains Direct Data Domain

在雷达天线应用的研究中,传统的直接数据域空时自适应处理算法在利用空域对消实现SOI滤除时,与SOI同方向的主瓣杂波也会被滤除掉,使得主瓣杂波得不到有效的抑制,从而影响输出信干噪比(SINR)。为了有效抑制主瓣杂波,提出了一种对空域对消目标后的数据进行主瓣杂波补偿的算法,以有效抑制主瓣杂波,提高输出信干噪比。同时针对SOI方向估计有偏差的情况,采用多约束的方法来保护SOI不被抑制,并进行了仿真。仿真结果验证了算法的有效性。

In the traditional direct data domain （DDD） space-time adaptive processing （STAP）,when signal of interest（SOI） is filtered by canceling in airspace,the mainlobe clutter with the same direction of SOI is also filtered,so that the mainlobe clutter cannot be suppressed effectively,and influenced output SINR. In order to suppressing clutter effectively and increasing the output SINR,the mainlobe clutter compensation algorithm suitable for the data which SOI had been eliminated in airspace cancellation is proposed. SOI can be protected by using mulptipal space_time constrains when SOI arrivals slightly offset. The simulation results show the effectiveness of the proposed algorithm.