1. 重庆大学 通信工程学院， 重庆 400044； 2. 重庆电子工程职业学院 通信工程学院， 重庆 401331
出版日期:2019-03-28发布日期:2019-03-28作者简介:冯文江(1963-)，男，四川省西充县人，教授，博士生导师，主要研究方向为新一代宽带移动通信和认知无线电等.基金资助:重庆市基础科学与前沿技术研究专项重点项目(cstc2017jcyjBX0047)，重庆市教委科学技术研究基金资助项目(KJ1602903)Pilot Allocation Based on Matched Game for Massive Multiple-Input Multiple-Output Systems
FENG Wenjiang，LI Le，DAI Caili1. College of Communication Engineering, Chongqing University, Chongqing 400044, China; 2. School of Communication Engineering, Chongqing College of Electronic Engineering, Chongqing 401331, China
Online:2019-03-28Published:2019-03-28摘要/Abstract
摘要： 为了使得大规模多输入多输出(MIMO)系统的上行链路可达速率最大化，提出一种基于匹配博弈的导频分配(PA-MG)算法.在用户侧，根据用户效用函数生成对导频的偏好列表，并向排列最优的导频发出申请；在基站侧，根据导频效用函数生成对请求用户的偏好列表，并依次将导频分配给排列最优的用户，直到完成所有用户的导频分配.仿真结果表明：相比于潜博弈的导频分配(PG-PA)算法，所提PA-MG算法支持的小区规模更大、复杂度更低；相比于WGC-PD(Weighted Graph Coloring Based Pilot Decontamination)算法，PA-MG算法能够获得更大的上行链路可达速率，各用户的信干噪比分布更均匀，且对阴影衰落的鲁棒性更强.
关键词: 大规模多输入多输出, 导频污染, 导频分配, 匹配博弈, 效用函数
Abstract: In order to maximize the uplink achievable sum rate of the multi-cell and multi-user massive multiple-input multiple-output (MIMO) system, a pilot allocation algorithm based on matched game (PA-MG) between users and pilots is proposed. Firstly, on the user side, a preference list of pilots is generated according to the user utility function, and an application is made to the pilots with the best arrangement for all users. Then, on the base station side, the preference list of the requesting users is generated according to the pilot utility function, and the pilots are assigned to the users with the best arrangement in turn until all users are assigned with the pilot. Simulation results show that the PA-MG algorithm supports larger cellular and less time complexity than the pilot allocation based on potential game (PG-PA) algorithm. Compared with the weighted graph coloring based pilot decontamination (WGC-PD) algorithm, the PA-MG algorithm can achieve greater uplink achievable sum rate, making the distribution of signal to interference plus noise ratio (SINR) of each user be more uniform, and the robustness to shadow fading is stronger.
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