CAJ | 학술논문

针对小波阈值去噪算法中传统软、硬阈值函数以及现有的一些文献所设计阈值函数的不足，提出一个新的阈值函数，此函数具有更好的光滑性，其随着小波分解尺度的变化而发生变化，具有很好的适应性，函数中无不确定参数，提高了去噪稳定性。仿真结果显示，采用新阈值函数去噪后的信号信噪比和均方根误差均优于传统阈值函数及现有的两种改进阈值函数，去噪效果良好，具有广阔的应用前景。
침대소파역치거조산법중전통연、경역치함수이급현유적일사문헌소설계역치함수적불족，제출일개신적역치함수，차함수구유경호적광활성，기수착소파분해척도적변화이발생변화，구유흔호적괄응성，함수중무불학정삼수，제고료거조은정성。방진결과현시，채용신역치함수거조후적신호신조비화균방근오차균우우전통역치함수급현유적량충개진역치함수，거조효과량호，구유엄활적응용전경。
Aiming at the insignificance of traditional soft and hard threshold functions and some of the threshold functions in existing literature, a new threshold function is presented, which has better smoothness,it changes with the wavelet decomposition scale changes,having good adaptability,there is no uncertain parameters in the function,improving noising stability.Simulation results show that the use of the new threshold function noising,signal’ s SNR and RMSE are better than the use of traditional soft and hard threshold functions and some of the threshold functions in existing literature, having good noising effect and broad application prospect.