Powell-Chau线性相位IIR滤波器的改进

摘要

Aiming at the truncated noise of the Powell-Chau linear phase infinite impulse response (IIR)filter,the molecular polynomial of forward and backward filter was rearranged to decrease the Gibbs effect,and the correction filter was added to eliminate the noise.The results show that Gibbs effect and the truncated noise are eliminated effectively with the proposed method.%针对Powell-Chau线性相位无限冲激响应(IIR)滤波器的截短噪声，重新排列正向、反向滤波器传递函数的分子多项式，以减小吉布斯效应，增加修正滤波器以消除截短噪声。仿真结果表明，采用提出的方案，吉布斯效应及截短噪声得到有效消除。