Study of a variable step size lms adaptive filtering algorithm 水中爆炸參數測試方法研究
Based on the tbag algorithm , an improved algorithm with the df - moe variable step size is presented 在tbag算法的基礎上,利用變步長判決反饋方法對其進行了改進。
The main works of this paper can be summarized as follows : 1 . in this paper , the inherent limitation of cma is studied which greatly affect the convergence properties , variable step size thoeries is put into cma , and several variable step size cm blind equalization algorithm is proposed which can overcome the tradeoff between convergence rate and misadjustment 本文的主要貢獻在于: 1 、本文對制約恒模算法收斂性能提高的因素做了深入分析,將變步長理論應用于恒模算法,得到了一系列恒模改進算法,克服了恒模算法收斂速度和收斂精度之間存在的內在矛盾。
In this thesis , the form of dsp + fpga is applied to apf ’ s examine and control system . through debugged , it realizes the harmonic examine method based on adaptive linear nerve net . meanwhile a variable step size ( vss ) lms algorithm is introduced to replace the constant step size case 本文對apf的dsp + fpga形式的數字化檢測與控制系統進行軟硬件調試,完成了flash程序存儲器的在線編程和自行引導,實現了基于自適應線性神經網絡的畸變電流檢測,同時提出用變步長lms算法代替固定步長lms算法,并且進行了理論分析和實驗驗證。
Based on x - filtered lms algorithm and - filtered lms algorithm adaptive inverse control , we use a new variable step size lms algorithm . adding little computation , variable step size lms algorithm can result in fast convergence speed and low residual error simultaneously . the adaptive feedback control can counteract the beginning error of the system 在原來的x -濾波lms算法自適應逆控制和-濾波lms算法自適應逆控制方法的基礎上,引入了新的變步長lms算法,在計算量增加不多的前提下,能同時獲得較快的收斂速度和較小的穩態誤差;引入自適應的反饋補償控制克服了被控系統的直流零頻漂移,使控制系統在初開始工作階段快速收斂;還引入自適應擾動消除器,它能最大限度的消除擾動。