结合小波阈值降噪中估计小波系数的软阈值和硬阈值方法的各自特点，提出了一种改进的方案。将该方法用于叠加了噪声的仿真信号进行降噪处理，采用信噪比和均方根误差作为评定降噪结果的标准，结果表明该方法得到了较好的降噪效果。关键词：小波变换；阈值；降噪Abstract: Based on the analysis of two traditional wavelet de-noising methods, which are based on soft-threshold and hard-threshold strategy respectively, an improved method is proposed here. Simulation results have revealed that the improved method does better than traditional threshold strategy in de-noising when it is applied in de-noising noised signal, based on the evaluation standard of SNR and RMSE.Key words: wavelet transform; threshold; denoising
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