基于折叠结构的半带滤波器的设计  

Fold Structure Based on the Design of Half-Band Filter

作　　者：叶巧文 林伟 

机构地区：[1]福建省微电子与集成电路重点实验室,福州350002

出　　处：《电子器件》2010年第1期85-89,共5页Chinese Journal of Electron Devices

基　　金：福建省教育厅支持(JA09006)

摘　　要：半带滤波器是一种高效的数字滤波器,目前流行的半带滤波器设计方法一般能够满足参数要求,但其存在着功耗高、面积大、资源耗费代价高等不足之处。为了弥补上述的不足,文中提出了一种基于折叠技术的新的半带滤波器设计方法。首先根据设计要求用MATLAB产生相应的滤波器系数,用CSD码对系数进行优化,然后采用折叠结构,通过代码实现。设计过程当中还用到分时复用和重定时技术。相比其它半带滤波器的设计,本设计具有耗费的资源少,整个抽取、滤波过程包括系数产生始终没有用到乘法器,而且延迟小、功耗低、面积小、单一时钟控制有很高的稳定性。Half-band filter is a highly efficient digital filter, a currently popular method of half-band filter design parameters was generally able to meet the requirements, but there is a high power consumption, size large, resource-consuming expense of higher deficiencies. To compensate for these shortcomings, this paper proposes a new technique based on the folded half-band filter design methods. First, the design requirements in accordance with MATLAB to produce the filter coefficients, using CSD coefficients to optimize the code right, and then folding structure, achieved through code. The design process is also used in time-multiplexed and re-timing technology. Compared with other half-band filter design, this design requires a small amount of resources for comsumption, and has an entire extraction and filtering process, which never use multipliers to the coefficient arising. It has also a lower delay time and single-clock control of a high stability, low power consumption and facilitated size.

关 键 词：数字上下变频 半带滤波器 折叠结构 FIR滤波器 

分 类 号：TN713[电子电信—电路与系统]