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智能天线的自适应算法通过迭代运算获取用于波束形成的最优权值矢量时,是否具有较快的收敛速度和较小的稳态误差成为决定波束形成性能的主要因素。据此提出在传统的LMS算法中引入变步长和变换域的思想,采用改进的自适应算法用于波束形成。MATLAB仿真结果表明,该算法具有较快的收敛速度和较小的稳态误差,波束形成的性能更优。
When the adaptive algorithm of smart antenna obtains the optimal weight vector for beamforming through iterative operation, whether it has faster convergence rate and smaller steady-state error becomes the main factor that determines the beamforming performance. Based on this, the idea of introducing variable step size and transform domain into the traditional LMS algorithm is proposed, and an improved adaptive algorithm is proposed for beamforming. MATLAB simulation results show that the proposed algorithm has faster convergence rate and smaller steady-state error, and the beamforming performance is better.