无线电通信技术
無線電通信技術
무선전통신기술
RADIO COMMUNICATIONS TECHNOLOGY
2012年
4期
48-50
,共3页
LMS算法%失调系数%变步长%波束赋形%稳态性
LMS算法%失調繫數%變步長%波束賦形%穩態性
LMS산법%실조계수%변보장%파속부형%은태성
LMS algorithm%disorder coefficient%variable step size%beam shaping%steady state
为了弥补传统的LMS算法采用固定步长无法解决收敛速度和稳态误差之间矛盾的缺陷,改进了失调系数,提出了一种改进的LMS算法用于求解自适应波束赋形的最佳权值。理论分析证实归一化的LMS算法可以通过采用一个可变因子使瞬时输出误差最小化。仿真结果表明,归一化的LMS算法采用了可变步长比传统LMS算法收敛快,稳态误差和失调相对于LMS都有所改善。
為瞭瀰補傳統的LMS算法採用固定步長無法解決收斂速度和穩態誤差之間矛盾的缺陷,改進瞭失調繫數,提齣瞭一種改進的LMS算法用于求解自適應波束賦形的最佳權值。理論分析證實歸一化的LMS算法可以通過採用一箇可變因子使瞬時輸齣誤差最小化。倣真結果錶明,歸一化的LMS算法採用瞭可變步長比傳統LMS算法收斂快,穩態誤差和失調相對于LMS都有所改善。
위료미보전통적LMS산법채용고정보장무법해결수렴속도화은태오차지간모순적결함,개진료실조계수,제출료일충개진적LMS산법용우구해자괄응파속부형적최가권치。이론분석증실귀일화적LMS산법가이통과채용일개가변인자사순시수출오차최소화。방진결과표명,귀일화적LMS산법채용료가변보장비전통LMS산법수렴쾌,은태오차화실조상대우LMS도유소개선。
This paper puts forward a new improved LMS algorithm to solve the best weights of adaptive beam shaping,and improve disorder coefficients based on the traditional LMS algorithm. Through theoretical analysis,normalized LMS algorithm adopts a variable factor to minimize the instantaneous output error. The simulation results shows that, with variable step size, the normalized LMS algorithm has higher performance over the traditional LMS algorithm in terms of convergence rate,steady state error and disorder.
