变步长自适应算法在GPS空时抗干扰中的应用  

Application of Variable Step Size Adaptive Algorithm in GPS Space Time Antijamming System

作　　者：潘延明[1] 卢艳娥[1] 李思佳[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《现代防御技术》2011年第5期51-54,共4页Modern Defence Technology

摘　　要：针对基于FROST阵列处理的最小均方算法(FROSR-least mean squares,FLMS)收敛速度较慢的缺点,将FLMS算法和变步长技术相结合,采用了一种基于Sigmoid函数的变步长快速自适应算法(variable step-size FROSR-least mean squares,VFLMS)。将该算法应用于GPS接收机空时自适应处理系统中,理论分析和计算机仿真表明,VFLMS算法能够抑制大于阵元个数的多个宽、窄带干扰,效果理想。Aimed at the disadvantage of slow convergence rate in least mean square （LMS） algorithm based on FORST array processing algorithm （FROSR-least mean squares, FLMS） , a fast variable step size adaptive algorithm （variable step-size FROSR-least mean squares, VFLMS） based on a new Sigmoid function is presented combining FLMS algorithm with variable step size technique. The algorithm is applied in GPS space time antijamming system. The academic analysis and the compute simulation indicate that the number of wideband and narrowband jam suppressed by VFLMS algorithm is restrained more than that of array antenna and the effect is perfect

关 键 词：抗干扰 空时自适应 FLMS算法 变步长 

分 类 号：TN973[电子电信—信号与信息处理] TP301.6[电子电信—信息与通信工程]