西安电子科技大学学报

• 研究论文 • 上一篇    下一篇

非对称多小区MIMO广播信道的干扰对齐

李川   

  1. (西安邮电大学 计算机科学学院, 陕西 西安 710061)
  • 收稿日期:2016-11-14 出版日期:2017-06-20 发布日期:2017-07-17
  • 作者简介:李川(1977-), 女, 讲师, 博士, E-mail: lichuan@xupt.edu.cn
  • 基金资助:

    陕西省自然科学基金资助项目(2013JQ8014);陕西省教育厅科研计划自然科学资助项目(2013JK1090)

Interference alignment for asymmetric MIMO multicell broadcast networks

LI Chuan   

  1. (School of Computer and Technology, Xi 'an Univ. of Posts and Telecommunications, Xi'an 710061, China)
  • Received:2016-11-14 Online:2017-06-20 Published:2017-07-17

摘要:

针对目前非对称多小区广播信道中的干扰问题,研究了方形信道矩阵条件下的干扰对齐方案.针对3种不同的非对称场景,基于广义特征值分解干扰对齐方案设计了预编码矩阵和解码矩阵;进一步,将系统自由度最大化问题建模为线性规划问题,从而可以有效求解.仿真结果显示,所提的广义特征值分解辅助的线性规划干扰对齐方案所取得的自由度优于现有的方案.

关键词: 多小区, 干扰对齐, 多输入多输出, 广义特征值分解, 线性规划

Abstract:

We investigate the interference alignment (IA) for the asymmetric MIMO multi-cell broadcast networks in the context of a square channel matrix. Specifically, for three different asymmetric scenarios, in order to design the precoding and decoding matrices, we propose the way to adopt the generalized eigenvalue decomposition (GEVD) based IA scheme. Furthermore, in order to maximize the achievable degrees of freedom (DoF), we formulate the problem as a linear programming (LP) problem which can be solved efficiently. It can be shown in simulation results that the maximum DoF obtained by the proposed GEVD IA assisted LP scheme is higher than that obtained by the existing scheme.

Key words: multi-cell, interference alignment, MIMO, generalized eigenvalue decomposition, linear programming