无线通信系统数字变频算法设计与实现  

Based on the OFDM receiveradaptive automatic gain control study

作　　者：王欣[1] 

机构地区：[1]武汉工程大学邮电与信息工程学院,湖北武汉430073

出　　处：《自动化与仪器仪表》2014年第6期144-146,共3页Automation & Instrumentation

摘　　要：数字下变频是射频拉远单元(RRU)中重要组成部分。该文研究了高倍抽取的数字下变频设计,重点分析了基于级联积分梳状滤波器、级联补偿滤波器、级联根升余弦滤波器的多级抽样频率算法。参考移动通信系统参数提出了一种基于Xilinx Spartan6系列FPGA XC6SL9-2CSG256数字下变频实现方案,实现了高速、高性能的数字下变频。完成了系统的软、硬件实现,并通过综合仿真与测试验证了系统的正确性。Digital down conversion plays a key roal in the RRU system.This paper studies the high decima-tion ratio of digital down converter and especially analyzes the multi-stage decimation algorithm based on CIC filter and CFIR filter and RRC filter. Based on the parameters of the mobile communication system, a DDC method based on Xilinx Spartan6 series FPGA XC6SL9-2CSG256 is put up in this paper, which is realized with a high speed and a high performance . Both the software and hardware implementation are achived and proved to be correct throngh full simulation and test.

关 键 词：数字下变频 积分梳状滤波器 补偿滤波器 根升余弦滤波器 FPGA 

分 类 号：TN92[电子电信—通信与信息系统]