| 利用频率掩蔽法设计均匀和非均匀余弦调制滤波器组 |
| |
| 引用本文： | 胡阿丽,张子敬.利用频率掩蔽法设计均匀和非均匀余弦调制滤波器组[J].现代电子技术,2007,30(10):35-38. |
| |
| 作者姓名： | 胡阿丽 张子敬 |
| |
| 作者单位： | 西安电子科技大学,雷达信号处理重点实验室,陕西,西安,710071 |
| |
| 摘 要： | 给出了一种均匀非均匀余弦调制滤波器组的设计方法。采用了频率掩蔽法设计原型滤波器,利用迭代算法优化原型滤波器的脉冲响应系数,目标函数表示为脉冲响应系数的四次方,非均匀余弦调制滤波器组通过合并均匀余弦调制滤波器组的相邻的滤波器得到,这种方法简单有效。最后的Matlab实例仿真验证了此算法的有效性。
|
| 关 键 词： | 余弦调制滤波器组 频率掩蔽法 近似重构 迭代算法 |
| 文章编号： | 1004-373X（2007）10-035-04 |
| 收稿时间： | 2006-10-11 |
| 修稿时间： | 2006-10-11 |
Designing Uniform and Nonuniform Cosine-modulated Filter Banks Using the Frequency Response Masking Approach |
| |
| HU A'li,ZHANG Zijing.Designing Uniform and Nonuniform Cosine-modulated Filter Banks Using the Frequency Response Masking Approach[J].Modern Electronic Technique,2007,30(10):35-38. |
| |
| Authors: | HU A'li ZHANG Zijing |
| |
| Abstract: | A method for designing uniform and nonuniform cosine modulated filter banks is presented.This method use the frequency response to design the prototype filter.The objective function is expressed as the fourth-order of the filter coefficients,which is minimized by using the iterative algorithm.The nonuniform CMF banks is derived in association with a uniform CMF bank,each constituent nonuform filter is formed by merging the relevant uniform filters in the associated uniform CMF bank.The method is simple and efficient.A design example is provided to demonstrate the validity of the method. |
| |
| Keywords: | cosine-modulated filter banks frequency response masking near perfect-reconstruction iterative algorithm |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
