直放站回波消除器中数字抗混频滤波器的设计  

Design of Spectrum Anti-mixing Digital Decimating Filter for Echo Canceller in Digital Repeater

作　　者：李学易[1] 郝禄国[1] 卢晓锋[2] 

机构地区：[1]广东工业大学信息工程学院,广东广州510006 [2]中国电信阳江分公司,广东阳江519500

出　　处：《电视技术》2010年第2期7-9,13,共4页Video Engineering

摘　　要：就DVB/CMMB数字回波消除直放站研发中涉及的抗混频数字抽取滤波器这一关键技术进行了详细研究,对3种数字抽取滤波器(FIR,HBF,CIC)进行了简要介绍,对其实际性能进行了对比分析。最后,采用Matlab与FPGA硬件平台相结合的设计方法对性能最合适的FIR滤波器进行硬件实现、联合仿真、测试与验证,该设计方法极大优化了设计进程。In this paper, the spectrum anti-mixing digital decimating filter, one of the key technologies during the research and development of digital echo cancelling repeater in DVB/CMMB networks, is studied in detail. Three types of digital decimating filter （FIR, HBF, CIC） are introduced, the actual performance of these three types decimating filters are also analyzed. Finally, a method using Matlab and FPGA is adopted to realize, simulate, test and verify the most suitable filter--FIR filter, and this method optimizes the design process mostly.

关 键 词：抽取滤波器 混频 回波消除 

分 类 号：TN911.7[电子电信—通信与信息系统]