摘要
一般的多普勒后处理方法忽视了相邻多普勒通道间数据的相关性,这将造成杂波协方差矩阵估计的不准,因此本文提出了一种联合相邻多普勒通道信息的空时自适应处理方法。该方法先通过时域滑窗后滤波的处理方式来降低杂波的自由度,再利用相邻多普勒门上数据相关性进行联合处理,最终构造出新的杂波协方差矩阵。该方法在提高时域自适应能力的同时减轻了空域杂波相消的负担,提高了处理器的性能,并消除因信息泄露带来的影响,以达到有效抑制地杂波的目的。通过对仿真和实测数据处理,证明了该方法的有效性。
In post-Doppler processing methods of space-time adaptive processing （STAP） available, the correlation between the channels is ignored, thus leading to the inaccurate estimation of covariance matrix of clutter. Hence,a new post-Doppler processing STAP method is pro- posed to solve the problem. The method firstly reduces the degree of freedom （DOF） of clutter by time-delay filtering. Then, the method makes full use of the correlation among the adjacent Doppler bins to construct a new covariance matrix. It improves the ability of adapation in the time domain and releases the burden of clutter suppression in the spacing domain, eliminates the influence of diffuse information on covariance matrix, and combines the multi-Doppler bins followed by the clutter suppression. Thereby, the proposed method can effectively suppress clutter. Finally, the measured data is processed by the method. Analysis results show that the method improves the processing of effectiveness.
出处
《数据采集与处理》
CSCD
北大核心
2012年第2期125-130,共6页
Journal of Data Acquisition and Processing
基金
教育部新世纪优秀人才计划(NCET-08-0891)资助项目
陕西省自然科学基金(2010JQ80241)资助项目
陕西省教育厅自然科学基金(2010JK836)资助项目
关键词
机载相控阵雷达
降维
多普勒通道
airborne phased array radar
reduced rank （RR）
Doppler channel
