北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2013, Vol. 36 ›› Issue (4): 71-75.doi: 10.13190/jbupt.201304.71.zhangy

• 论文 • 上一篇    下一篇

基于格拉斯曼码本的分布式干扰对齐算法

章扬1,2, 周正2, 石磊3, 李斌2   

  1. 1. 中国石油大学(华东) 计算机与通信工程学院, 山东 青岛 266580;
    2. 北京邮电大学 泛网无线通信教育部重点实验室, 北京 100876;
    3. 中国电子科技集团 第54研究所, 石家庄 050081
  • 收稿日期:2012-11-15 出版日期:2013-08-31 发布日期:2013-05-22
  • 作者简介:章扬(1980—),男,讲师,博士生,E-mail:zhangyang@upc.edu.cn.
  • 基金资助:

    国家自然科学基金项目(60972079,61271180,60902046);中央高校基本科研业务费专项项目(2012RC0103);韩国知识经济部仁荷大学ITRC基金项目(NIPA-2011-C1090-1111-0007)

Distributed Interference Alignment with Grassmannian Codebook

ZHANG Yang1,2, ZHOU Zheng2, SHI Lei3, LI Bin2   

  1. 1. College of Computer and Communication Engineering, China University of Petroleum, Shandong Qingdao 266580, China;
    2. Key Laboratory of Universal Wireless Communication (Beijing University of Posts and Telecommunications), Ministry of Education, Beijing 100876, China;
    3. The 54th Research Institute, China Electronics Technology Group Corporation, Shijiazhuang 050081, China
  • Received:2012-11-15 Online:2013-08-31 Published:2013-05-22

摘要:

有限反馈干扰对齐对信道矩阵进行量化从而降低反馈所需要的信息量,但经典有限反馈干扰对齐算法只考虑对信道状态矩阵的量化,且多限于理论分析. 针对分布式干扰对齐技术中预编码矩阵反馈数据量要比信道矩阵反馈大得多的情况,从降低分布式干扰对齐技术预编码矩阵反馈对反馈信道的影响出发, 提出一种基于格拉斯曼码本的分布式干扰对齐算法,基于格拉斯曼码本对预编码矩阵和重组矩阵进行量化,并以最小化干扰泄漏为目标进行迭代优化. 仿真实验结果表明,当信噪比小于或等于15 dB,且迭代次数小于或等于10次时,该算法能在系统性能接近理想反馈条件的同时有效降低反馈信息量.

关键词: 多输入多输出, 干扰对齐, 有限反馈, 格拉斯曼码本, 弦距离

Abstract:

Limited feedback interference alignment quantizes channel state information to reduce the amount of information of feedback. But classic limited feedback interference alignment algorithms only quantize the channel state information, and limited to theoretical analysis. Considering that the precoding matrix has much greater feedback data than channel state information. A new distributed interference alignment algorithm based on grassmannian codebook is proposed in view of reducing the impact of precoding matrix on feedback channel in distributed interference alignment, precoding matrices and decoding matrices are quantized based on grassmannian codebook, and are optimized for minimizing the interference leakage. The simulation results show that compared with the perfect feedback, when the signal noise rate of transmitters is less than or equal to 15 dB and the numbers of iteration are less than or equal to 10, the algorithm presented in the paper can effectively decrease the feedback data while the capacity close to the system with perfect channel state information.

Key words: multiple input multiple output, interference alignment, limited feedback, Grassmannian codebook, chord distance

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