P波段SAR射频干扰信号分析及抑制方法研究  

Study on Radio Frequency Interference Signal Analysis and Suppression in P Band SAR

作　　者：丁斌[1,2] 梁兴东[1] 向茂生[1] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《宇航学报》2012年第6期788-795,共8页Journal of Astronautics

基　　金：国家"863计划"(2007AA120303);国家"973"项目(2009CB724003)

摘　　要：分析了实测P波段SAR静默接收数据,研究了模拟电视信号的频谱特性。针对P波段SAR回波中的模拟电视干扰信号,提出了一种新的干扰抑制方法。通过在时域拼接多个脉冲的回波数据增加模拟电视信号的观测时间以提高频率分辨率,进而在距离频域对其准确识别。根据模拟电视信号的频谱特征,在距离频域构造滤波器组滤除模拟电视信号的离散谱线,保留了谱线间SAR回波信号的频谱分量。实际回波数据的成像处理结果验证了方法的有效性。Both P band SAR received silent data and spectrum characteristics of analog television signal are analyzed. In order to suppress analog television signals in P band SAR echoes, a novel interference suppression algorithm is proposed. By splicing multi-pulse SAR echoes in time domain, high frequency resolution of analog television signal can be obtained. Therefore the analog television signal can be identified accurately. By designing filter bank in range-frequency domain according to spectrum characteristics of analog television signals, the discrete spectrum lines of analog television signals are removed and the spectrum of SAR echoes between these discrete spectrum lines are saved. Finally, the proposed algorithm is verified by processing real P band SAR data.

关 键 词：P波段 合成孔径雷达 干扰抑制 模拟电视信号 射频干扰信号 

分 类 号：TN974[电子电信—信号与信息处理]