电子测试
電子測試
전자측시
ELECTRONIC TEST
2013年
10期
83-85
,共3页
小波去噪%参数%阈值函数%仿真实验
小波去譟%參數%閾值函數%倣真實驗
소파거조%삼수%역치함수%방진실험
wavelet denoising threshold function%parameter%simulation experiment
小波去噪应用越来越广泛,它的理论较完善,算法简单,稳定性,消噪的效果更好。但总存在一些不足,这是由于阈值函数自身的的缺陷。本人提出一种改进的阈值函数,它具有更好的光滑性,随着参数的不断取值,改进的阈值函数始终介于软、硬阈值函数之间,而且表达式更加清晰,计算量小。结果表明,在MATLAB(2012a)环境下,对混入高斯白噪声的各种复杂信号进行了消噪的仿真实验,改进的方法好于传统去噪方法。
小波去譟應用越來越廣汎,它的理論較完善,算法簡單,穩定性,消譟的效果更好。但總存在一些不足,這是由于閾值函數自身的的缺陷。本人提齣一種改進的閾值函數,它具有更好的光滑性,隨著參數的不斷取值,改進的閾值函數始終介于軟、硬閾值函數之間,而且錶達式更加清晰,計算量小。結果錶明,在MATLAB(2012a)環境下,對混入高斯白譟聲的各種複雜信號進行瞭消譟的倣真實驗,改進的方法好于傳統去譟方法。
소파거조응용월래월엄범,타적이론교완선,산법간단,은정성,소조적효과경호。단총존재일사불족,저시유우역치함수자신적적결함。본인제출일충개진적역치함수,타구유경호적광활성,수착삼수적불단취치,개진적역치함수시종개우연、경역치함수지간,이차표체식경가청석,계산량소。결과표명,재MATLAB(2012a)배경하,대혼입고사백조성적각충복잡신호진행료소조적방진실험,개진적방법호우전통거조방법。
The wavelet denoising is applied more and more widely, its theory is perfect, the algorithm is simple, stability, better denoising effect. But there exist some problems, this is due to a defect threshold function itself.I propose an improved threshold function, it has a better smoothness, with constant parameters, between the improved threshold function is always between soft and hard threshold function, and the expression is more clear, small amount of calculation. The results show that, in the MATLAB (2012a) environment, on a variety of mixed with the Gauss white noise of the complex signal simulation denoising, the improved method is better than the traditional denoising method.