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计算机工程

• 移动互联与通信技术 • 上一篇    下一篇

CoMP系统中的天线选择与预编码联合算法

常有宝,葛文萍,韩前方   

  1. (新疆大学 信息科学与工程学院,乌鲁木齐 830046)
  • 收稿日期:2016-09-26 出版日期:2017-11-15 发布日期:2017-11-15
  • 作者简介:常有宝(1991—),男,硕士研究生,主研方向为LTE-A技术;葛文萍(通信作者),教授;韩前方,硕士研究生。
  • 基金资助:
    新疆维吾尔自治区自然科学基金(2012211A013)。

Antenna Selection and Precoding Joint Algorithm in CoMP System

CHANG Youbao,GE Wenping,HAN Qianfang   

  1. (College of Information Science and Engineering,Xinjiang University,Urumqi 830046,China)
  • Received:2016-09-26 Online:2017-11-15 Published:2017-11-15

摘要: 针对大规模多输入多输出系统天线数量过多使得预编码算法计算量增加的问题,提出一种基于协作的天线选择与预编码联合算法。该算法通过降低小区间和用户间干扰,避免传统预编码算法对信道矩阵求逆运算时因天线数量增加使得复杂度提高。理论分析和仿真结果表明,与迫零预编码算法、最小均方误差预编码算法和基于信漏噪比最大化的预编码算法相比,天线选择和预编码联合算法不仅能更好地提高系统的信道容量,而且能够降低预编码算法复杂度。

关键词: 多输入多输出, 协作多点传输, 天线选择算法, 预编码算法, 信道容量, 算法复杂度

Abstract: Aiming at the problem that too many antennas of large-scale Multiple Input Multiple Output(MIMO) system increases the amount of calculation of precoding algorithm,this paper adopts the method combining antenna selection algorithm with traditional precoding algorithm in Coordinated Multiple Points(CoMP) transmissionsystem,through reducing the interference between zones and interference between users,it can avoid the higher complexity brought by traditional precoding algorithm to channel matrix inversion with the increase of antenna numbers.Theoretical analysis and simulation results show that compared with Zero Forcing (ZF) precoding algorithm,Minimum Mean Square Error(MMSE) precoding algorithm and precoding algorithm based on maximization of signal to leakage plus noise ratio,antenna selection and joint precoding algorithm can better improve the channel capacity of the system and reduce the complexity of precoding algorithm.

Key words: Multiple Input Multiple Output(MIMO), Coordinated Multiple Points(CoMP) transmission, antenna selection algorithm, precoding algorithm, channel capacity, algorithm complexity

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