基于多级内插的基带信号成形滤波设计  

Design of Shaping Filter for Base-band Signals Based on Multi-interpolator

作　　者：安勇[1] 牟容增[1] 陈家国[1] 阎跃鹏[1] 

机构地区：[1]中国科学院微电子研究所,北京100029

出　　处：《通信技术》2008年第5期4-6,共3页Communications Technology

基　　金：国家863基金资助项目(编号:2007AA12Z343)。

摘　　要：介绍了数字基带信号成形滤波的基本原理。针对软件无线电领域广泛应用的基带信号成形问题,提出了一种新型的基于多级内插的实现方案。给出了该方案的具体实现方法,并与传统的一级插值方法进行了比较。比较结果证明多级插值方案可以显著节省硬件资源,并且成形后的基带信号具有更小的带内损耗和更大的带外抑制能力。该方案的可行性和优越性已经体现在浮标定位信息回传通讯系统中。The basic theory of shaping filter, used in digital base-band signals, is presented in the paper. With the base-band signal shaping, which is widely used in the area of software radio, a new method based on the multi-interpolator is proposed. The actual implementation, including the comparison with the traditional method based on one-time interpolator, is described. The result shows that hardware resources can be reduced greatly in the new method. Meanwhile, the shaped base-band signals have less in-band lo...

关 键 词：数字通讯 基带信号 成形滤波 多级内插 

分 类 号：TN713[电子电信—电路与系统]