摘要
基于波束赋形的波束切换空间调制算法,不仅可以提高频谱效率,还可以利用天线阵列增益提高能量效率。该文利用信道响应构造统计平均的协方差矩阵,构造正交特征向量作为阵列的加权矢量,形成相互独立的多个等效传输信道,利用波束赋形增益和分集增益提高无线通信的传输可靠性和传输能力。进一步采用天线子阵分组方法,克服信道相关性带来的不利影响。性能分析和仿真结果表明,特征波束角度空间调制方案可获得更多的波束组合数目,会明显改善译码性能和频谱效率。
Based on beamforming beam switching spatial modulation algorithm,it can improve spectrum efficiency,and it also can use antenna array gain to enhance energy efficiency.In this paper,a statistical average covariance matrix is constructed by using channel response,and the orthogonal feature vectors are constructed as weighted vectors for array.It forms multiple independent equivalent transmission channels,utilizing beamforming gain and diversity gain to improve the transmission reliability and capacity of wireless communication.Furthermore,an antenna subarray grouping method is proposed to overcome the adverse effects of channel correlation.Both performance analysis and simulation results indicate that the feature beam angle spatial modulation scheme can obtain more beam combinations,significantly improve decoding performance and spectrum efficiency.
作者
王喜媛
王勇
WANG Xiyuan;WANG Yong(Information Science Research Center,Xidian University,Xi’an 710071,China;School of Cyber Engineering,Xidian University,Xi’an 710071,China)
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2024年第3期390-395,共6页
Journal of University of Electronic Science and Technology of China
基金
国家重点研发计划(2018YFB0804103)
陕西省重点研发计划(2024GX-YBXM-103)。
关键词
特征波束形成
空间调制
正交空时分组码
MIMO
最大似然
eigen-beamforming
spatial modulation
orthogonal space-time block coding(OSTBC)
multi-input multi-output
maximum likelihood
