采用包络检波去除SISAR直达波干扰的新方法  

A novel method to eliminate interference of direct transmitted echo in SISAR by envelope demodulation

作　　者：陈觉之[1] 袁领峰[1] 罗斌凤[1] 张守宏[2] 

机构地区：[1]海军工程大学电子工程学院,湖北武汉430033 [2]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《海军工程大学学报》2005年第2期23-27,共5页Journal of Naval University of Engineering

基　　金：信息产业部预研基金资助项目(57.7.2.10)

摘　　要：为了去除直达波干扰,从强的直达波干扰背景中有效提取SISAR侧影成像的目标全息信号,提出了对接收的含有目标全息信号和强直达波的混合信号直接进行包络检波,然后通过对检波后的输出进行时域的正交分解,恢复目标的全息信号的新方法.仿真结果验证了理论分析的正确性.In order to eliminate the interference of direct transmitted echo and extract target radio holographic signal used in SISAR imaging from the background of intensive direct transmitted echo effectively, a novel method is proposed, by which the mixed signal of direct transmitted echo and target radio holographic signal received is processed with envelope demodulation, and then the target radio holographic signal is recovered by applying orthogonal decomposition to the output of demodulated signal in time domain. This method is validated by the computer simulation.

关 键 词：包络检波 阴影逆合成孔径雷达(SISAR) 直达波 目标全息信号 正交分解 

分 类 号：TN911.7[电子电信—通信与信息系统]