协作多点传输中一种基于特征子信道的干扰对齐预编码矩阵优化方案

王存祥, 邱玲

王存祥, 邱玲. 协作多点传输中一种基于特征子信道的干扰对齐预编码矩阵优化方案[J]. 信号处理, 2011, 27(3): 395-399.
引用本文: 王存祥, 邱玲. 协作多点传输中一种基于特征子信道的干扰对齐预编码矩阵优化方案[J]. 信号处理, 2011, 27(3): 395-399.
WANG Cun-Xiang, QIU Ling. An Optimized Precoding Scheme based on Eigen-Channel in Interference  Alignment for Coordinated Multi-Point Transmission Systems[J]. JOURNAL OF SIGNAL PROCESSING, 2011, 27(3): 395-399.
Citation: WANG Cun-Xiang, QIU Ling. An Optimized Precoding Scheme based on Eigen-Channel in Interference  Alignment for Coordinated Multi-Point Transmission Systems[J]. JOURNAL OF SIGNAL PROCESSING, 2011, 27(3): 395-399.

协作多点传输中一种基于特征子信道的干扰对齐预编码矩阵优化方案

基金项目: 国家科技重大专项课题“IMTAdvanced新型无线传输技术研发”(2008ZX03003-004和2008BAH30B09);“TD-LTE面向商用系统设备研发”(2010ZX03002-003)和国家重点基础研究发展计划(973)2007CB310602支持
 
详细信息
  • 中图分类号: TN929.5

An Optimized Precoding Scheme based on Eigen-Channel in Interference  Alignment for Coordinated Multi-Point Transmission Systems

  • 摘要: 由于普遍采用频率复用因子为1的方式组网,多小区干扰已经成为限制无线蜂窝系统容量的主要因素。协作多点传输技术可以有效抑制蜂窝系统中多小区干扰问题,提高小区边缘吞吐率。近年来,作为协作多点传输的一种实现形式,干扰对齐技术受到广泛关注,其优势在于可以获得多小区系统最优的发送自由度。本文提出了一种在干扰对齐技术下基于特征子信道的预编码矩阵优化方案。本方案通过选取与最好的特征子信道对准的预编码矢量发送信号,使得信号经历最好的一组特征子信道,改善接收端的信号强度,从而达到提高系统吞吐量的目的。仿真结果表明,相比已有的预编码矩阵的设计方案,本文提出的方案在系统的吞吐量方面有明显的提升。
    Abstract: Due to the widely use of frequency reuse factor one in the current and future wireless cellular systems, multi-cell interference has become a key factor constraining the system throughput. Coordinated multi-point transmission (CoMP) can efficiently reduce the interference in multi-cell system, thus improving the cell edge throughput. As a realization of CoMP, interference alignment (IA) attracts wide attention recently, which can obtain the optimal transmitting degree of freedom in multi-cell systems. A novel optimized precoding scheme is proposed for the downlink interference channel of cellular multi-input multi-output (MIMO) system. The precoding matrixes in the proposed scheme are designed by selecting the precoding vectors which are closest to the maximal eigen-channels, which improves the channel condition of the desired signal and strengthens the desired signal, in order to achieve a higher system throughput. Simulation results show that the proposed scheme can improve the throughput of the MIMO system significantly, especially for the case that the channel is spatial correlated.
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出版历程
  • 收稿日期:  2010-10-31
  • 修回日期:  2010-12-23
  • 发布日期:  2011-03-24

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