多模无线移动终端中的采样速率转换  

Sample Rate Conversion in Multi-mode Mobile Terminal

作　　者：林华杰[1] 史浩山[1] 

机构地区：[1]西北工业大学电子工程系,陕西西安710072

出　　处：《电讯技术》2003年第1期21-25,共5页Telecommunication Engineering

摘　　要：采样速率转换是基于软件无线电思想的多模无线移动终端设计中的一项关键技术。有理数采样速率转换可以划分为整数倍和分数倍采样率转换。实现整数倍采样率转换可以采用时不变滤波器 ,然而实现分数倍采样率转换一般需要采用较复杂的时变滤波器。本文以实现整数倍抽取内插的CIC滤波器为基础 ,提出了一种实现分数倍采样率转换的时变CIC滤波结构。Sample rate conversion is an important functionality of a multi-mode mobile communication terminal. Rational ratio conversion can be realized by integer and fraction ratio conversion. For integer ratio conversion, the filters would be time-invariant, but for fractional ratio conversion, the filters would be time-variant whose structure is more complex.This paper designs a time-variable CIC filter based on CIC filter for fractional ratio sample rate conversion.

关 键 词：多模无线移动终端 采样速率转换 软件无线电 抽取 内插 CIC滤波器 

分 类 号：TN929.53[电子电信—通信与信息系统]