| 一种基于CEM FRM技术的滤波器组设计新方法 |
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| 引用本文： | 张立志,戚建平,罗文宇.一种基于CEM FRM技术的滤波器组设计新方法[J].信息工程大学学报,2009,10(2):177-180,194. |
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| 作者姓名： | 张立志 戚建平 罗文宇 |
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| 作者单位： | 信息工程大学信息工程学院,河南,郑州,450002 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 随着信道数的增加，对原型滤波器的过渡带的设计提出了越来越高的要求，这会导致原型滤波器的长度变得过长，大大降低了计算效率。基于用频率响应屏蔽技术（FRM）设计窄过渡带滤波器的优越性，文章提出了一种新的分析滤波器组结构。采用基于复指数调制的频率响应屏蔽（CEMFRM）滤波器作为原型滤波器来设计调制滤波器组，此结构非常适用于可变带宽系统。当滤波器组原型滤波器的过渡带要求很窄时，此结构极大降低了计算复杂度。最后用一个8信道滤波器组设计实例证明了此设计的有效性。
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| 关 键 词： | 频率响应屏蔽 复指数调制 滤波器组 数字滤波器 |
New Filter Bank Design Method Based on CEM FRM Technique |
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| ZHANG Li zhi,QI Jian ping,LUO Wen yu.New Filter Bank Design Method Based on CEM FRM Technique[J].Journal of Information Engineering University,2009,10(2):177-180,194. |
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| Authors: | ZHANG Li zhi QI Jian ping LUO Wen yu |
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| Affiliation: | ( Institute of Information Engineering, Information Engineering University, Zhengzhou 450002, China) |
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| Abstract: | With the increasing of channels, the request for transition of prototype filter is very high. This makes the length of prototype filter longer, and decreases computation efficiency. Based on the advantage of Complex Exponential Modulation FRM technique, a new analysis filter bank architecture is proposed in the paper, which can decrease computation complexity consumedly when the transition bandwidth of prototype filter is very sharp especially. It is the same as alterable bandwidth system. At last, an eight channel filter bank design example is used to illustrate its feasibility. |
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| Keywords: | frequency-response masking complex exponential modulation （CEM） filter banks dig- ital filter |
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