计算机仿真
計算機倣真
계산궤방진
COMPUTER SIMULATION
2010年
2期
312-315
,共4页
陷波器%工频噪声%小波阈值消噪%脑电信号
陷波器%工頻譟聲%小波閾值消譟%腦電信號
함파기%공빈조성%소파역치소조%뇌전신호
Notch filter%50Hz power frequency disturbance%Wavelet thresholding de-noising method Electroencephalogram(EEG)
为了脑电信号消噪,在陷波器的基础上,提出了一种将小波分析与陷波器相结合用于脑电消噪的改进方法.首先设计了一种改进的去噪算法(陷波器),介绍了小波阈值消噪算法的四种阈值规则,并分别结合已设计陷波器对自发脑电消噪进行结果比较.分析表明,两种算法的结合比单纯应用其中一种算法更有效地抑制了嗓声,证明了改进方案的可行性和有效性.
為瞭腦電信號消譟,在陷波器的基礎上,提齣瞭一種將小波分析與陷波器相結閤用于腦電消譟的改進方法.首先設計瞭一種改進的去譟算法(陷波器),介紹瞭小波閾值消譟算法的四種閾值規則,併分彆結閤已設計陷波器對自髮腦電消譟進行結果比較.分析錶明,兩種算法的結閤比單純應用其中一種算法更有效地抑製瞭嗓聲,證明瞭改進方案的可行性和有效性.
위료뇌전신호소조,재함파기적기출상,제출료일충장소파분석여함파기상결합용우뇌전소조적개진방법.수선설계료일충개진적거조산법(함파기),개소료소파역치소조산법적사충역치규칙,병분별결합이설계함파기대자발뇌전소조진행결과비교.분석표명,량충산법적결합비단순응용기중일충산법경유효지억제료상성,증명료개진방안적가행성화유효성.
Based on notch filer,a novel method is proposed in this article-combination of notch filer and wavelet thresholding.First,a 50Hz FIR notch filter is designed.Then,four algorithms of wavelet thresholding method are introduced.After that,the improved method is used for de-noising the real measured EEG signal by combining each kind of the four algorithms with the filer.According to the results,it is proved that this method can be used to de-noise EEG more effectively,and enhance the signal-to-noise ratio.Therefore,its excellent feasibility and validity are definitely proved.
