一种基于回波数据的机载雷达通道均衡的方法  

A Method for Channel Equalization Based on Echo Data in Airborne Radar

作　　者：刘向阳[1,2] 周争光[1] 廖桂生[1] 毛志杰[1,2] 

机构地区：[1]西安电子科技大学雷达信号处理重点实验室,陕西西安710071 [2]西安通信学院,陕西西安710106

出　　处：《电子学报》2009年第3期658-663,共6页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60736009,60472097)

摘　　要：提出了一种适用于机载雷达的基于回波数据的通道频率响应均衡的方法.该方法从参考通道和待均衡通道中选取一组高相关性的回波,分别作为期望信号和均衡器输入,借助维纳滤波方法估计均衡器系数;理论分析表明,在杂噪比足够高的情况下,该均衡器响应逼近于实际的通道失配误差.无须改装现有的雷达设备,该方法就可以对馈线和接收机的失配一并进行均衡.实测数据实验验证了该方法有效性.In this paper,a new method for equalizing the channel frequency response errors is presented based on the echo data in airborne radar. The method selects a pair of highly-correlated echoes from the reference and under-eqnalization channels, which are taken as the expected signal and the input signal of the equalizer, respectively. The wiener filter theory can then be used to estimate the coefficients of the equalizer. Theory analysis shows that the estimated equalizer approaches the practical mismatch errors in the situation that the clutter-to-noise ratio （CNR） is high enough. This method can equalize the mismatch of the transmission line and the receiver simultaneously, without refitting the radar equipments in use. Experimental results of a pair of measured data are given to demonstrate the validity of the proposed method.

关 键 词：通道均衡 机载雷达 实测数据 地杂波模型 

分 类 号：TN957[电子电信—信号与信息处理]