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

被引：7
|
作者：
Chen Lei [1 ]
Luo Zhigang [1 ]
Cheng Xiantao [1 ]
Li Shaoqian [1 ]
机构：
[1] Univ Elect Sci & Technol China, Natl Key Lab Sci & Technol Commun, Chengdu 611731, Sichuan Provinc, Peoples R China
来源：
CHINA COMMUNICATIONS | 2014年 / 11卷 / 06期
基金：
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
wireless communication; I/Q imbalance; time-domain compensation; golay sequence; DIRECT-CONVERSION RECEIVERS; CORRELATOR;
D O I：
10.1109/CC.2014.6878998
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
A time-domain frequency-dependent I/Q imbalance compensation scheme based on Go lay complementary sequence for receiver is presented. By utilizing property of Go lay 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.
引用
收藏
页码：1 / 11
页数：11
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