This paper presents the mathematics description of the adaptive antenna array and the basic principle of GPS anti-jamming based on LMS algorithm.The algorithm is simulated by Matlab.A Digital Beam Forming（DBF） technique which is better than LMS is introduced as well.Both its optimal weight vector is deduced.This algorithm has better effect for interfering suppression,and shows its advantage null.%介绍了自适应天线阵列信号响应的数学描述,论述了在GPS抗干扰应用中广泛采用的基于最小均平方（LMS）的自适应算法的原理和实现过程,并对算法进行了仿真。提出了一种优于LMS算法的自适应数字波束形成（DBF）技术,推导出了其最优权系数矢量的计算方法,并对该算法进行了仿真。仿真结果表明：4阵元LMS的自适应调零算法对于单干扰的抑制和双干扰的抑制都达到了较好的效果,同时也体现了该算法零陷的优点。
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