基于位置信息的波束成形算法及中断性能分析  

Outage performance analysis of beamforming algorithm based on position information

作　　者：赵威豪 卢麒轩 马婧 李洪 ZHAO Weihao;LU Qixuan;MA Jing;LI Hong(College of Telecommunications and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《空间电子技术》2023年第6期81-86,共6页Space Electronic Technology

基　　金：南京邮电大学创新训练计划项目(编号:CXXYB2022021)。

摘　　要：随着全球定位系统技术的发展,无线通信系统中发射端能够较为准确地获取接收端的位置信息。在此背景下,提出了基于接收端位置信息的波束成形码本设计方案,并分析了系统在该方案下的中断性能。首先,在莱斯衰落信道模型下,根据接收端的最大信噪比准则得到发射端的最佳波束成形权矢量。其次,给出均匀线阵天线模型下的波束成形码本设计方案。然后,推导出该方案下的中断概率表达式。最后,利用MATLAB软件仿真验证了该方法的有效性,并检验了相关参数对系统性能的影响。仿真结果表明,发射天线的数目和码本长度越大,阵列波束的指向就越精确,由此可以提高系统的中断概率和性能。所提算法可用于下行链路预处理,通过码本索引的方式,减少了通信系统中信令的开销和对信令的依赖。With the advancement of global positioning system(GPS),the transmitter can obtain the precise position of the receiver in the wireless communication system.This paper proposes a beamforming(BF)codebook design based on the receiver’s position information and analyses the outage performance of the system.Primarily,this work first derives the optimal BF power vector under the Rice fading channel from maximizing the received signal-to-noise ratio.Next,a codebook design scheme for uniform linear array(ULA)BF is proposed and a closed-form expression for the outage probability is derived.Finally,computer simulations are conducted to verify the effectiveness of the codebook scheme and examine the effects of relevant parameters on the system’s performance.The results show that the number of transmit antennas and the codebook length are larger,the array beam pointing are more accurate,which can improve the system’s outage probability and performance.The proposed algorithm is used for downlink preprocessing,and the codebook index can reduce the spend and dependence on signaling in the communication system.

关 键 词：波束成形 均匀线阵 码本设计 中断性能 

分 类 号：TN92[电子电信—通信与信息系统] V443[电子电信—信息与通信工程]