| 摘要: |
| 无蜂窝大规模多输入多输出（Multiple-Input Multiple-Output，MIMO）作为6G潜在技术得到了广泛关注，但误符号率作为表征其可靠性的关键指标却鲜有研究。针对此问题，研究了瑞利衰落信道下基于非理想信道状态信息的无蜂窝大规模MIMO系统，推导了其使用最大比合并方法检测二进制相移键控信号时的误符号率表达式。在此基础上，提出了一种基于几何规划的功率控制算法，通过协同调节用户功率控制系数，实现了最小化所有用户中的最大误符号率。仿真结果表明了所推导误符号率理论表达式的准确性，同时表明所提功率控制算法可使最大用户的误符号率降低至满功率控制算法的0.72‰、分数功率控制算法的58%和遗传算法的96%，验证了所提算法能够有效增强通信系统的可靠性。 |
| 关键词: 无蜂窝大规模MIMO 误符号率 功率控制 瑞利衰落信道 |
| DOI：10.20079/j.issn.1001-893x.240731001 |
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| 基金项目:国家自然科学基金资助项目(62301108)；辽宁省教育厅高校基本科研项目(JYTMS20230176，JYTQN2023479)；大连市科技人才创新支持政策实施计划-青年科技之星(2023RQ096)；大连东软信息学院博士科研启动基金(ZX2024KJ002) |
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| Analysis and Optimization of Symbol Error Rate in Cell-free Massive MIMO Systems |
| CHEN Yiling,LI Wanran,JIN Sinian,ZHANG Cai,JU Moran |
| (1.School of Intelligence and Electronic Engineering,Dalian Neusoft University of Information,Dalian 116023,China;2.College of Information Science and Technology,Dalian Maritime University,Dalian 116026,China) |
| Abstract: |
| As a potential 6G technology,cell-free multiple-input multiple-output(MIMO) has received widespread attention,but there is little research on symbol error rate as a key indicator of its reliability.In response to this issue,the cell-free massive MIMO systems with imperfect channel state information under Rayleigh fading channels is investigated.Based on the maximal ratio combining scheme,the expression for the symbol error rate of binary phase shift keying signals is derived.In addition,a geometric programming based power control algorithm is proposed,which minimizes the maximum symbol error rate among all users by collaboratively adjusting the power control coefficients of users.The simulation results indicate the accuracy of the derived theoretical expression for symbol error rate.Meanwhile,the proposed power control algorithm can reduce the symbol error rate of the maximum user to 0.72 |
| Key words: cell-free MIMO symbol error rate power control Rayleigh fading channel |
《电讯技术》编辑部 