内插FIR数字滤波器的多相实现  

Poly-phase implementation of interpolation FIR digital filters

作　　者：刘在爽[1] 杨抒文[1] 王劲涛[1] 宋健[1] 

机构地区：[1]清华大学数字电视技术研究中心,北京100084

出　　处：《电视技术》2009年第S1期21-24,共4页Video Engineering

基　　金：欧盟第六框架国际合作项目(045461)

摘　　要：提出一种内插FIR数字滤波器基于多相结构的优化实现方法,利用多相结构各子滤波器的自身对称和镜像对称特性,复用加权求和单元,显著降低了实现复杂度。以384阶、4倍内插SRRC滤波器的FPGA实现为例,验证了所提多相结构优化实现方法的优越性。A novel implementation scheme of interpolation FIR digital filter based on the poly-phase structure is proposed.The scheme utilizes the characteristics of self-symmetric and mirror symmetric of the sub-filters and shares the weighted summation units to achieve the significant reduction of logic resources and low complexity in the implementation.An FPGA implementation example of a 384-order SRRC filter with 4 times interpolation is presented to demonstrate the advantages of the proposed method.

关 键 词：采样率变换 内插滤波器 多相结构 自身对称与镜像对称 

分 类 号：TN713.7[电子电信—电路与系统]