一种变步长自适应算法在通道校准中的应用  

Application of variable step size adaptive algorithm to channel calibration

作　　者：苏郢[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：《华中科技大学学报（自然科学版）》2010年第6期57-59,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家高技术研究发展计划资助项目(2001AA631050)

摘　　要：针对相控阵雷达中多通道接收机的幅相这一保证波束形成的重要指标,在一种变步长的LMS(最小均方)算法基础上,引进动量项,并通过步长来调节动量项加权参数,提出一种新的变步长的自适应算法.通过理论分析,比较了新算法和变步长LMS算法的性能.仿真结果表明,新算法在对接收机窄带信号处理上,收敛性和稳定性相对于变步长的LMS算法都有提高,能较好地达到稳态误差和收敛速度之间的平衡,对信号具有良好的校准效果.The amplitude and phase balance is an important indicator of beam forming in phased array radar. Based on a variable LMS （least mean square） algorithm, a new variable step-size adaptive algorithm is proposed, in which adds momentum project is added and the weighted parameters of momen turn are modulated by step. According to theoretical analysis and simulation in handling receiver＇s narrow-band signal, the new algorithm is better than the variable LMS algorithm in convergence rate and steady state, furthermore it has the good adjustment effect to the signal.

关 键 词：相控阵雷达 幅相均衡 变步长算法 自适应算法 通道校准 

分 类 号：TN958[电子电信—信号与信息处理]