一种半带滤波器系数量化的优化方法  

An Optimized Quantization Method of Half-Band Filter Coefficients

作　　者：王文博 WANG Wen-bo(The 54th Research Institute of CETC)

机构地区：[1]中国电子科技集团公司第五十四研究所

出　　处：《中国集成电路》2021年第8期31-35,共5页China lntegrated Circuit

摘　　要：半带滤波器广泛的应用于现代通信系统中,在电路的实现过程中,需要将滤波器系数量化成定点数,而滤波器系数的量化方法又会直接影响到滤波器的性能。基于滤波器系数的转换,本文提出了一种系数量化的优化方法,并推导出半带滤波器的优化实现结构。仿真结果表明,在相同的量化位宽下,优化后的滤波器性能更佳,阻带抑制纹波改善将近5dB。Half-band filter is widely used in modern communication systems,filter coefficients need to be transformed into fixed values in implementation,and the quantization method of filter coefficients will directly affect the performance of the filter.A quantization method based on coefficients conversion is proposed in this paper.In addition,an optimized implementation structure is also presented.Finally,the computer simulation shows that optimized filter have better performance than conventional filter through the same quantized word length,Stop-band attenuation is improved about 5dB.

关 键 词：半带滤波器 系数量化 阻带抑制 

分 类 号：TN713[电子电信—电路与系统]