北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2014, Vol. 37 ›› Issue (5): 45-49.doi: 10.13190/j.jbupt.2014.05.010

• 论文 • 上一篇    下一篇

TD-LTE-Advanced系统中一种新型8天线双码本设计方法

刘剑飞, 许强, 曾祥烨, 王蒙军   

  1. 1. 河北工业大学 信息工程学院, 天津 300401;
    2. 天津市电子材料与器件重点实验室, 天津 300401
  • 收稿日期:2013-12-06 出版日期:2014-10-28 发布日期:2014-11-07
  • 作者简介:刘剑飞(1968- ), 教授, E-mail: jfliu@hebut.edu.cn.
  • 基金资助:

    天津市高等学校科技发展基金项目(20120715);河北省高层次人才项目(C2013001048)

A New Scheme on Precoding Codebook for TD-LTE-Advanced Systems

LIU Jian-fei, XU Qiang, ZENG Xiang-ye, WANG Meng-jun   

  1. 1. School of Information Engineering, Hebei University of Technology, Tianjin 300401, China;
    2. Tianjin Key Laboratory of Electronic Material and Devices, Tianjin 300401, China
  • Received:2013-12-06 Online:2014-10-28 Published:2014-11-07

摘要:

提出了一种新型8天线双码本设计方法,有效提高了TD-LTE-Advanced系统频谱效率. 该方法根据层映射的层数对码本分组,层数为1、2及5~8时,利用R8协议中4天线码本的满秩矩阵生成码本;层数为3、4时,将离散傅里叶变换矩阵与循环延迟分集技术相结合构造新码本. 与R10协议中给出的8天线双码本相比,在反馈开销相同的情况下,新码本码字间距更大. 仿真结果表明,在8发2收层数为2的条件下,新码本增益提高2 dB以上;当信噪比为5 dB时,新码本比现有码本的频谱效率高15%以上.

关键词: TD-LTE-advanced, 预编码, 双码本, 频谱效率

Abstract:

A new 8-antenna double codebook design scheme was proposed to improve TD-LTE-Advanced system's spectrum efficiency. Therein, the codebooks for differently layer number were constructed according to full rank matrix provided in Rel-8 protocol or discrete Fourier transform matrix combining with cyclic delay diversity. Analysis dedicates the new codebooks have larger intervals in codewords comparing with the 8-antenna double codebook in Rel-10 protocol. Simulation shows that the proposed method can obtain higher gain at least 2 dB for 8-transmitting and 2-receiving antennas and 2 layers; while the new codewords can increase spectral efficiency more than 15% compared with existing codebooks when signal to noise ratio is 5 dB.

Key words: TD-LTE-advanced, precoding, double codebook, spectral efficiency

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