Determination of Neighborhood Size Parameter of Local Projective Algorithm for Noise Reduction
Yaan Li · Jisuanji fangzhen · 2007
The algorithm of local projective nonlinear noise reduction based on nonlinear dynamic system is more effective for noise reduction of chaotic signal and non-stationary signals.In local projective nonlinear noise reduction algorithm,the selection of neighborhood size parameter has an important effect on the result of noise reduction.Two methods of how to choose neighborhood size parameters were discussed.The methods are based on recurrence plot and noise level estimation respectively.After adding write noise of different level to Logistic map and Lorenz model,the noise reduction results were obtained which are more satisfactory compared with the results from other noise reduction methods.And the results also show that the neighborhood size determined by noise level is superior to that determined by recurrence plot.