舰载无源综合脉冲孔径雷达射频干扰抑制  

Cochannel interference suppression for the ship-based passive synthetic impulse and aperture radar

作　　者：张雅斌[1] 陈伯孝[1] 张守宏[1] 尚海燕[1] 

机构地区：[1]西安电子科技大学雷达信号处理重点实验室

出　　处：《西安电子科技大学学报》2007年第4期514-517,537,共5页Journal of Xidian University

基　　金：国家部委预研基金资助(40106020203)

摘　　要：对舰载无源综合脉冲孔径雷达射频干扰的功率谱分布与相关特性进行了定量分析.利用距离拉伸后部分正距离单元和所有负距离单元内的回波数据,使用距离余弦加权对待检单元内干扰统计特性进行精确估算.然后,根据干扰功率明显强于雷达回波的先验信息,在自适应波束形成前由时域卡亨南-洛厄维分解对待检单元回波中的干扰进行了滤除.实测数据表明了分析与干扰抑制方法的有效性.The power distribution and correlation characteristic of cochannel interference are quantitatively analyzed in the ship-based passive Synthetic Impulse and Aperture Radar（SIAR） scenario. The statistical characteristic of interference at the interested range bin is estimated accurately using echoes from some positive and all negative frequency range bins after stretching with consine weight. Thereafter, the Karhunen-Loeve transformation in the temporal domain is used to the echo at the interested range bin and interference is suppressed before adaptive beamforming provided that its power is stronger than radar echoes. Effectiveness of interference suppression is confirmed by real data.

关 键 词：射频干扰抑制 综合脉冲孔径雷达 相关矩阵 

分 类 号：TN957.51[电子电信—信号与信息处理]