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在对智能天线波束形成相关理论研究的基础上,重点研究了LMS自适应滤波算法,并借用Matlab仿真平台,研究信号进入阵列以后,利用LMS算法对信号的幅度和相位进行调整加权求和,使输出的信号达到最优效果。并且分析了程序设计参数中的阵元个数、波达方向的角度等对信号性能的影响,使信号的收敛程度达到最佳。通过仿真可以看出LMS算法计算量小,可以达到较好的滤波效果,很好的抑制干扰,容易实现。
Based on the research on the theory of smart antenna beamforming, this paper focuses on the LMS adaptive filtering algorithm and borrows Matlab simulation platform to study the signal into the array, the use of LMS algorithm to adjust the signal amplitude and phase weighted sum The output signal to achieve the best results. The influences of the number of array element, the angle of the direction of arrival and so on on the signal performance are analyzed and the degree of signal convergence is optimized. It can be seen through the simulation LMS algorithm is a small amount of computation, can achieve better filtering effect, good suppression of interference, easy to implement.