正交解调误差对宽带波束形成的影响  

The Influence of Quadrature Demodulation Errors on Broadband Beamforming

作　　者：李宁[1] 汤俊[1] 彭应宁[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《电子学报》2009年第6期1338-1342,共5页Acta Electronica Sinica

基　　金：国家自然科学基金资助项目(No.60602048);航空科学基金(No.20060112118);国家专项研究项目(No.20094010040)

摘　　要：宽带相控阵雷达中解调误差的存在会对自适应宽带波束形成造成影响.论文以宽带信号和正交解调误差模型为基础,求解了时域和频域宽带波束形成中自相关矩阵的表达式.通过对自相关矩阵的分析论文指出,误差会引起干扰自由度增加、波束形成性能下降.在宽带波束形成中需要更多的空间自由度.The quadrature demodulation errors in broadband phased array radar will influence the performance of the broadband beamforming. Based on the broadband signal model and demodulation error model the covariance matrices of the time-domain and frequency-domain broadband beamforming in error case are derived. Through the analysis of the covariance matrix, it is found that the degrees of freedom of the interference will increase and the performance of beamforming will become worse. Consider the demodulation errors, more degrees of freedom should be provided to a real radar system.

关 键 词：宽带相控阵雷达 宽带波束形成 正交解调误差 

分 类 号：TN958.92[电子电信—信号与信息处理]