正交解调接收机幅相不平衡对双频测距的影响  

Influence of Amplitude and Phase Imbalance of Quadrature Demodulation Receiver on Dual Frequency Ranging

作　　者：袁俊泉[1] 龚享铱[2] 皇甫堪[2] 

机构地区：[1]空军雷达学院,湖北武汉430010 [2]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《信号处理》2005年第1期95-97,共3页Journal of Signal Processing

摘　　要：采用正交解调接收机来获得I、Q信号时,接收机两个通道间不可避免地会存在一定的幅相误差。本文首先对存在幅相误差时双频测距的基本原理进行了理论分析,并与无幅相误差时进行了比较,得出了几个有用的结论,为双频连续波测距雷达的设计提供了一定的理论依据。最后通过仿真验证了理论分析的正确性。Quadrature demodulation receiver has necessarily amplitude and phase errors when producing in-phase(I) and quadrature(Q) components. First this paper theoretically analyzes the basic principle of dual frequency ranging in present of amplitude and phase errors while comparing with that in absence of them. Several useful conclusions are derived. They provide the theory basis for design of dual frequency CW ranging radar. Finally simulations prove the validity of theory.

关 键 词：雷达 数字信号处理机 正交解调接收机 幅相误差 双频测距 

分 类 号：TN957.51[电子电信—信号与信息处理]