OFDM无线局域网接收机中I/Q不平衡性补偿研究  

Implementation of I/Q imbalance compensation in OFDM WLAN receivers

作　　者：周亦敏[1] 余晓亮[1] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200090

出　　处：《计算机工程与设计》2010年第10期2187-2190,共4页Computer Engineering and Design

基　　金：国家863高技术研究发展计划基金项目(2005AA420070)

摘　　要：为了克服OFDM系统中高阶正交幅度调制中的RF非理想性,研究了I/Q不平衡效应与解决方法,提出了一种基于IEEE802.11a标准,在OFDM系统零中频接收机上的I/Q不平衡补偿电路,并给出取代传统高阶均衡的低复杂度时域补偿算法。通过Matlab对IEEE802.11a收发端包含通道模型在内的整体系统进行了模拟。仿真结果表明,该设计有助于形成一个非常有效和易于执行OFDM无线局域网接收机。To advance the non-ideality of RF in the OFDM high-order quadrature amplitude modulation（QAM）,I/Q imbalance and so-lutions are studied.An I/Q imbalance compensation circuit in IEEE802.11a baseband OFDM zero intermediate frequency（zero-IF） re-ceiver is proposed.A low complexity time-domain compensation algorithm is used to replace the traditional high-order equalizer.Matlab is used to simulate the whole transceiver including the channel model.Results of the simulation indicated the proposed methods could contribute to a very robust and easily implemented OFDM WLAN receiver.

关 键 词：无线局域网 正交频分复用 零中频接收机 I/Q不平衡 时域估计和补偿 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]