Golay Sequence Based Time-Domain Compensation of Frequency-Dependent I/Q Imbalance  

作　　者：CHEN Lei LUO Zhigang CHENG Xiantao LI Shaoqian 

机构地区：[1]National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China

出　　处：《China Communications》2014年第6期1-11,共11页中国通信（英文版）

基　　金：supported in part by the National High Technology Research and Development Program of China(863 Program)(No.2011AA010201);National Science and Technology Major Project(No.2013ZX03005010);the National Natural Science Foundation of China(NSFC)(No.61371103 and No.60902025);Key Science and Technology Program of Sichuan Province of China(No.2012FZ0119 and No.2012FZ0029)

摘　　要：A time-domain frequencydependent I/Q imbalance compensation scheme based on Golay complementary sequence for receiver is presented. By utilizing property of Golay sequence, the signal and its conjugate interference(image interference)in preamble are separated by correlation and used to estimate I/Q imbalance parameters.After that, a Least Square(LS) estimation of compensation filter is obtained and adopted in the compensation structure. Two applications of the presented algorithm are discussed: we could either estimate the channel along with I/Q imbalance or estimate the imbalance parameter only to maintain a lower cost. Both applications are testified by simulation. The results show that the image interference is significantly suppressed even in poor SNR condition, and the computation cost of the algorithms is low.A time-domain frequency- dependent I/Q imbalance compensation scheme based on Golay complementary sequence for receiver is presented. By utilizing property of Golay sequence, the signal and its conjugate interference （image interference） in preamble are separated by correlation and used to estimate I/Q imbalance parameters. After that, a Least Square （LS） estimation of compensation filter is obtained and adopted in the compensation structure. Two applications of the presented algorithm are discussed： we could either estimate the channel along with I/Q imbalance or estimate the imbalance parameter only to maintain a lower cost. Both applications are testified by simulation. The results show that the image interference is significantly suppressed even in poor SNR condition, and the computation cost of the algorithms is low.

关 键 词：wireless communication  I/Qimbalance time-domain compensation golaysequence 

分 类 号：TN92[电子电信—通信与信息系统]