关键词: 小波变换, 非线性回归, 阈值, 去噪

Abstract: Nonlinear regression function obtained by making fully use of wavelet transform is proposed.The regression parameters of signal are gained by reconstructing wavelet coefficients after wavelet coefficients of detail part are influenced by threshold during wavelet decomposition of using wavelet to transform the signal into approximate part and detail part.An algorithm is described and an example is illustrated to this method here.The PSNR of signal gained by the method is lower，and the signal is smoother，so the method is effective and feasible.

Key words: wavelet transform, nonlinear regression, threshold, de-noising