| 全加结构抽取和补偿滤波器的高效实现 |
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| 引用本文： | 孙磊,安建平.全加结构抽取和补偿滤波器的高效实现[J].北京理工大学学报,2008,28(6):526-530. |
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| 作者姓名： | 孙磊 安建平 |
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| 作者单位： | 北京理工大学,信息科学技术学院电子工程系,北京,100081;北京理工大学,信息科学技术学院电子工程系,北京,100081 |
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| 摘 要： | 针对接收机设计中使用有限冲击响应(FIR)滤波器对级联积分梳状(CIC)抽取滤波器进行补偿滤波的问题,提出了一种全加结构无乘法运算的FIR补偿滤波器实现方式.通过对FIR补偿滤波器系数的近似,将滤波器系数用与它最接近的{2n}集合中的一个数表示,将滤波器乘法运算转换为移位运算,整个补偿滤波运算仅由滤波器阶数个加法单元构成.仿真结果表明,这种采用系数近似的算法在实现高速运算的同时,可以满足对CIC抽取滤波器进行补偿滤波的要求.
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| 关 键 词： | 级联积分梳状滤波器 补偿滤波 滤波器高效结构构 |
| 收稿时间： | 2007/7/19 0:00:00 |
Efficient Implementation of an All-Adder Multiplier-Free Decimation and Compensation Filter |
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| SUN Lei and AN Jian-ping.Efficient Implementation of an All-Adder Multiplier-Free Decimation and Compensation Filter[J].Journal of Beijing Institute of Technology(Natural Science Edition),2008,28(6):526-530. |
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| Authors: | SUN Lei and AN Jian-ping |
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| Institution: | Department of Electronic Engineering, School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081, China;Department of Electronic Engineering, School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | A novel algorithm on multiplier-free finite impulse response filter(FIR) is presented,which can be efficiently implemented to compensate the cascade integrator-comb filter passband ripple.The multiplier-free architecture is achieved by a power-of-2 digital to approximately represent the compensation filter coefficients.With this representation,multiply operation is replaced with a shift operation,which can be efficiently hardware implemented.Simulation results proved that the coefficients-approximate filter can well reach the demand of CIC compensation filter. |
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| Keywords: | cascade-integrator comb filter compensation filter multiplier free filter |
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