任意长度余弦调制滤波器组的设计  

The design of arbitrary-length cosine-modulated filter banks

作　　者：康晓恩[1] 张子敬[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,西安710071

出　　处：《微计算机信息》2008年第16期277-278,202,共3页Control & Automation

基　　金：国家自然科学基金(No.60472086)

摘　　要：一般我们对线性相位原型滤波器进行调制得到长度为N=2mM的完全重构FIR滤波器组,其中M为通道数。在本文中提出了原型滤波器长度为任意的,完全重构余弦调制滤波器组。原型滤波器的设计大多涉及到多参数非线性优化问题,设计复杂度高。本文使用了拉格朗日乘数法,通过迭代实现了原型滤波器的设计。这种方法设计简单,计算量大大减少,对初值不敏感,并且可以实现令人满意的通带效果。It is well known that FIR filter banks which satisfy the perfect reconstruction （PR） property, can be obtained by cosine modulation of a linear-phase prototype filter of length , where is the number of channels. In this paper, we present a PR cosine-modulated filter banks where the length of the prototype filter is arbitrary, An efficient iterative Lagrange multiplier approach is developed to design the filter banks. This approach has high design efficiency, simple design procedure and is not sensitive to the initial prototype filter coefficients. It has a satisfying passband.

关 键 词：完全重构 余弦调制滤波器组 任意长度 拉格朗日乘数法 

分 类 号：TN713[电子电信—电路与系统]