新型工业化
新型工業化
신형공업화
New Industrialization Straregy
2014年
3期
74-79
,共6页
智能天线%LMS 算法%变步长
智能天線%LMS 算法%變步長
지능천선%LMS 산법%변보장
smart antenna%LMS algorithm%variable step size
本文主要研究智能天线波束形成算法，智能天线是移动通信系统中的关键技术，自适应波束形成算法是智能天线的核心技术，算法的收敛性能和稳态误差及对期望信号的跟踪能力是衡量算法性能的重要因素。经研究最小均方（LMS）算法，本文提出基于双曲余弦函数的变步长 LMS 算法，通过建立误差ε和步长μ的函数关系，实时调整步长，解决了稳态失调系数和收敛速度的矛盾。matlab 仿真结果表示本文算法收敛速度更快，稳态误差更小，对期望信号的跟踪能力更好。仿真结果表明本文算法具有更好的实用性。
本文主要研究智能天線波束形成算法，智能天線是移動通信繫統中的關鍵技術，自適應波束形成算法是智能天線的覈心技術，算法的收斂性能和穩態誤差及對期望信號的跟蹤能力是衡量算法性能的重要因素。經研究最小均方（LMS）算法，本文提齣基于雙麯餘絃函數的變步長 LMS 算法，通過建立誤差ε和步長μ的函數關繫，實時調整步長，解決瞭穩態失調繫數和收斂速度的矛盾。matlab 倣真結果錶示本文算法收斂速度更快，穩態誤差更小，對期望信號的跟蹤能力更好。倣真結果錶明本文算法具有更好的實用性。
본문주요연구지능천선파속형성산법，지능천선시이동통신계통중적관건기술，자괄응파속형성산법시지능천선적핵심기술，산법적수렴성능화은태오차급대기망신호적근종능력시형량산법성능적중요인소。경연구최소균방（LMS）산법，본문제출기우쌍곡여현함수적변보장 LMS 산법，통과건립오차ε화보장μ적함수관계，실시조정보장，해결료은태실조계수화수렴속도적모순。matlab 방진결과표시본문산법수렴속도경쾌，은태오차경소，대기망신호적근종능력경호。방진결과표명본문산법구유경호적실용성。
This paper mainly research the adaptive beamforming algorithm of smart antenna. smart antenna becomes one of the key technologies of mobile communication systems,and Adaptive beamforming algorithm is a crucial technology of the smart antennas. The convergence speed and maladjustment error and the capability of acquisition and tracking of desired signal are main factors to determine algorithm performance. After the least mean square(LMS)algorithm is researched, A variable step least mean square(LMS)algorithm which based on hyperbolic tangent function is proposed in this paper. A function relationship is established between signal error and step size,and the contradiction between convergence speed and maladjustment error is solved. The simulation with MATLAB indicates that the proposed algorithm has faster convergence and smaller maladjustment error and better performance of acquisition and tracking of desired signal . The simulation results prove that the new method has better practicability.
