MIMO-OFDM系统中一种低开销有限反馈新方法

doi:10.3724/SP.J.1087.2012.01804

计算机应用 ›› 2012, Vol. 32 ›› Issue (07): 1804-1806.DOI: 10.3724/SP.J.1087.2012.01804

MIMO-OFDM系统中一种低开销有限反馈新方法

李岩¹,²,景小荣¹,²,于秀兰¹,²,张祖凡¹,²,陈前斌¹,²

1. 移动通信技术重庆市重点实验室(重庆邮电大学),重庆400065
2. 重庆邮电大学通信与信息工程学院，重庆400065

收稿日期:2011-12-09 修回日期:2012-02-09 发布日期:2012-07-05 出版日期:2012-07-01
通讯作者: 李岩
作者简介:李岩(1988-)，男，新疆乌鲁木齐人，硕士研究生，主要研究方向：无线移动通信、有限反馈预编码；景小荣（1974-），男，甘肃平凉人，副教授，博士，主要研究方向：多天线系统中的信号处理；于秀兰（1973-），女，四川广安人，副教授，硕士，主要研究方向：移动通信技术；张祖凡（1972-），男，湖北荆州人，教授，博士，主要研究方向：无线移动通信理论与技术；陈前斌（1967-），男，四川营山人，教授，博士生导师，主要研究方向：多用户信息理论、新一代移动通信网络关键技术、网络体系架构、多媒体通信系统。
基金资助:
国家科技重大专项(2009ZX03004-006);重庆市教委科研项目（KJ110526）

New limited feedback method with lower overhead in MIMO-OFDM system

LI Yan¹,²,JING Xiao-rong¹,²,YU Xiu-lan¹,²,ZHANG Zu-fan¹,²,CHEN Qian-bin¹,²

1. Chongqing Key Laboratory of Mobile Communication (Chongqing University of Posts and Telecommunications), Chongqing 400065, China
2. School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;

Received:2011-12-09 Revised:2012-02-09 Online:2012-07-05 Published:2012-07-01
Contact: LI Yan

摘要/Abstract

摘要： 以LTE-Advanced为背景，针对多输入多输出—正交频分复用(MIMO-OFDM)系统中的关键技术——基于码本的有限反馈预编码进行了研究，提出了一种基于递归算法的有限反馈新方法。利用各子载波间的频域相关性，以前一个子载波所选码字为基础，通过内积运算排序的方法来确定当前子载波的码字集合，然后对与该新码字集合相对应的码字索引进行可变长编码，以用于系统反馈。仿真结果表明：在递归反馈算法的基础上利用可变长编码能有效降低LTE-Advanced系统的反馈开销。

关键词: 多输入多输出—正交频分复用, 有限反馈, 递归反馈, 可变长编码

Abstract: This paper investigated the limited feedback technology based on the Multiple Input Multiple Output Orthogonal Frequency Division Multiple (MIMO-OFDM) system in LTE-Advanced applications. A new limited feedback method based on recursive feedback was proposed. The method utilized the correlation between the subcarrier channels. The codewords for the current subcarrier could be determined by ordering the result of the inner product with respect to the codewords of the previous subcarrier. Then the variable length encoding method was used to code the index of the new codewords. The experimental results show that the recursive feedback algorithm based on variable length coding can reduce the feedback bits effectively in LTE-Advanced systems.

Key words: Multiple Input Multiple Output Orthogonal Frequency Division Multiple (MIMO-OFDM), limited feedback, recursive feedback, variable length coding

中图分类号:

TN911.7

李岩景小荣于秀兰张祖凡陈前斌. MIMO-OFDM系统中一种低开销有限反馈新方法[J]. 计算机应用, 2012, 32(07): 1804-1806.

LI Yan JING Xiao-rong YU Xiu-lan ZHANG Zu-fan CHEN Qian-bin. New limited feedback method with lower overhead in MIMO-OFDM system[J]. Journal of Computer Applications, 2012, 32(07): 1804-1806.

参考文献

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MIMO-OFDM系统中一种低开销有限反馈新方法

New limited feedback method with lower overhead in MIMO-OFDM system

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