首页 > 学术期刊 > 电路与系统学报 > 2009年6期 > 一种可变带宽FRM滤波新结构
一种可变带宽FRM滤波新结构
A novel variable bandwidth FRM filter
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- 摘要:
- 设计窄过渡带FIR滤波器的一种
非常有效的方法是采用频率响应屏蔽技术(FRM).但是如果过渡带要求过窄,经典FRM滤波器各子滤波器的阶数会变得很高.据此,本文提出一种可变带宽镜
像半带滤波FRM滤波新结构,通过增加两个镜像半带滤波器,将原型滤波器及其互补滤波器的镜像分别分成奇偶两部分,使得原型滤波器和屏蔽滤波器的设计更加
灵活,并降低了滤波器的计算复杂度,达到了设计高效窄过渡带滤波器的目的.理论分析和实例均验证了该结构的有效性.
- Abstract:
- Frequency-response
masking technique is very effective to design sharp transition
bandwidth FIR filter. But if the need of transition is over-strict, the
taps of sub-filters of classical FRM filter are very high. Based on it, a
novel FRM filter is proposed, which divides the mirror images of
prototype filter and its compensation filter into parity parts
respectively by using two half-band mirror filters. The method makes the
design of prototype filter and masking filter more flexible. So the
computation complexity of total filter is lower than existing FRM
filter. At last, its feasibility is verified by theoretic analysis and
an example.
- 作 者:
-
罗文宇
刘双平
张立志
金梁
LUO Wen-yu
LIU Shuang-ping
ZHANG Li-zhi
JIN Liang
- 作者单位:
- 解放军信息工程大学,信息工程学院,河南,郑州,450002
- 期 刊:
- 电路与系统学报
ISTICPKU
- Journal:
- JOURNAL OF CIRCUITS AND SYSTEMS
- 年,卷(期):
- 2009, 14(6)
- 分类号:
- TN913.7
- 关键词:
-
频率响应屏蔽(FRM)
镜像半带滤波器
窄过渡带滤波器
内插
- Keywords:
-
frequency-response masking
imaged half-band filter
sharp transition bandwidth filter
interpolation
- 机标分类号:
- TN9 TP3
- 机标关键词:
- 可变带宽FRM原型滤波器新结构filtervariable bandwidthcomputation complexity过渡带prototype设计镜像design计算复杂度互补滤波器半带滤波器FIR滤波器effective子滤波器屏蔽技术频率响应
- 基金项目:
- 新世纪人才基金