地铁隧道有限空间Massive MIMO性能研究  

Study on Massive MIMO Performance in Limited Space of Metro Tunnel

作　　者：王树奇[1] 吕方 WANG Shuqi;LYU Fang(Xi’an University of Science and Technology,Xi’an Shaanxi 710054,China)

机构地区：[1]西安科技大学,陕西西安710054

出　　处：《通信技术》2023年第3期263-268,共6页Communications Technology

基　　金：国家自然科学基金(61901357)。

摘　　要：基于实际场景测量,对地铁隧道有限空间Massive MIMO性能进行了研究。采用复用天线阵列法实现收发同步切换分时虚拟MIMO测量。基于测量数据,主要分析了3.5 GHz和5.6 GHz频段Massive MIMO信道在隧道场景的性能,研究了信道矩阵的特征值分布和条件数,着重分析了不同收发天线距离对Massive MIMO信道容量的影响,考虑了基于信噪比的有效秩选择方法。研究结果表明,在3.5 GHz及5.6 GHz频段上,Massive MIMO信道矩阵条件数的范围处在30 dB至55 dB之间,信道容量有较大的提升,且信道矩阵的有效秩随收发机距离增大的衰减趋势明显。以上结果对隧道场景下一代无线通信系统的设计与部署提供了依据。Based on the actual scenario measurements,the Massive MIMO performance in the limited space of metro tunnels is studied.The multiplexing antenna array method is used to realize the synchronous switching time-sharing virtual MIMO measurement.Based on the measurement data,the performance of the 3.5 GHz and 5.6 GHz frequency band Massive MIMO channels in the tunnel scenarios is mainly analyzed,the characteristic value distribution and condition number of the channel matrix are studied,the influence of different transceiver antenna distances on the Massive MIMO channels capacity is focused on,and the effective rank selection method based on signal-to-noise ratio is considered.The results indicate that in the 3.5 GHz and 5.6 GHz frequency bands,the Massive MIMO channel matrix condition number range is between 30 dB and 55 dB,the channel capacity is greatly increased,and the effective rank of the channel matrix decreases with the increase of the transceiver distance.The above results provide a basis for the design and deployment of the next-generation wireless communication systems in tunnel scenarios.

关 键 词：Massive MIMO 信道测量 特征值 信道容量 

分 类 号：TN822[电子电信—信息与通信工程]