自适应技术在高频地波雷达接收系统中的应用  

Research on the application of adaptive techniques in high frequency ground wave radar

作　　者：桂任舟[1] 杨子杰[1] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430079

出　　处：《系统工程与电子技术》2006年第2期181-183,187,共4页Systems Engineering and Electronics

基　　金：国家"863"高技术计划基金资助课题(2001AA631050)

摘　　要：针对当前高频地波雷达工作频段内的噪声干扰和弱目标受强目标的旁瓣干扰的问题,提出了一种代价函数为三阶统计量的自适应技术来消除干扰的新方案。该方案通过灵活设计频谱监测部件的工作方式,不但能使雷达工作在干扰较低的频段,而且还可充分利用频谱监测所得的外界噪声数据。主要是依据噪声之间具有强相关性而噪声与有用回波信号之间不相关,从而可通过自适应方法实时调整系统参数实现对上述两问题的解决。Researchers have been focusing much attention on how to reduce noise disturbances in the frequency segment of high frequency （HF） ground wave radar and how to restrain the sidelobes of strong targets that interfere with the detection of weak targets. A new method based on adaptive technique is proposed to solve these problems. By changing the working mode of the frequency spectrum monitor （FSM）, the radar can run in the frequency segment with lower noise disturbances, and the ambient noise data obtained by FSM can be exploited efficiently. Though the correlation between noises over very short time periods is strong, there is no correlation between the noise and the useful echo signal. Based on this phenomenon, the system parameters can be adjusted in real time with adaptive techniques to solve the two previously mentioned problems.

关 键 词：频谱监测 高频地波雷达 自适应滤波 旁瓣干扰 

分 类 号：TN957.51[电子电信—信号与信息处理]