基于室内大规模单输入多输出(Single-Input Multiple-Output,SIMO)测试,开展了26GHz毫米波无线信道簇变化量的时变特性建模研究.首先针对构建2020年信息社会的无线通信关键技术(Mobile and Wireless Communications Enablers for the Tw...基于室内大规模单输入多输出(Single-Input Multiple-Output,SIMO)测试,开展了26GHz毫米波无线信道簇变化量的时变特性建模研究.首先针对构建2020年信息社会的无线通信关键技术(Mobile and Wireless Communications Enablers for the Twenty-twenty Information Society,METIS)标准中分簇算法的不足进行改进,然后通过对功率时延谱求包络,来去除簇内射线及噪声对分簇结果的影响,在此基础上进行分簇会得到更加合理的结果.办公室环境下大规模虚拟天线阵列测试数据的分析结果表明,簇数目的变化量服从正态分布,经过不同时间簇数目变化量的均值和方差与二次函数较吻合.因此,将办公室场景下簇数目的变化量建模成均值和方差为二次函数的正态分布是合适的.展开更多
In this article an ultra-wideband rectangular Dielectric Resonator Antenna is designed for millimeter wave 5G frequency band applications.Indoor 5G communications require antenna system with wide bandwidth and high ef...In this article an ultra-wideband rectangular Dielectric Resonator Antenna is designed for millimeter wave 5G frequency band applications.Indoor 5G communications require antenna system with wide bandwidth and high efficiency to enhance the throughput in the channel.To fulfill such requirements a Dielectric Resonator Antenna(DRA)is designed here which has achieved an ultra-wide bandwidth of 20.15%(22.32–27.56 GHz)which is 5.24 GHz of bandwidth centered at 26 GHz as resonating frequency.This covers the complete band 30(24.3–27.5 GHz)of 5G spectrum.26 and 28 GHz are considered as most popular frequencies in millimeter wave 5G communications.The aperture fed DRA designed here has also achieved an efficiency of 96 percentage with maximum radiation in the broadside direction(Phi=0,Theta=0).The measured gain of the DRA is 6.3 dB.The DRA designed here has dimensions of 0.25λ0×0.22λ0×0.12λ0.under the characteristic’s mode.The DRA is placed over a substrate with dimensions 0.5λ0×0.5λ0×0.02λ0.A cross slot aperture has been made on the ground plane which is placed above to the substrate.Here a full ground plane is used to resonate the antenna and is of similar dimension to the substrate.A microstrip line with two concentric rings makes an annular feed structure is used to excite the DRA and is placed below the substrate.The DRA is excited here in characteristics mode TE1Y1 and is the only mode of excitation.The DRA is linearly polarized,and the characteristic mode of excitation is maintained with 50 Ohm input impedance of the antenna.The DRA also gives here a good difference between the co-pol and cross pol approximately 15 to 20 dB.This antenna is more suitable for 5G indoor applications in millimeter wave frequency band centered at 26 GHz.展开更多
文摘基于室内大规模单输入多输出(Single-Input Multiple-Output,SIMO)测试,开展了26GHz毫米波无线信道簇变化量的时变特性建模研究.首先针对构建2020年信息社会的无线通信关键技术(Mobile and Wireless Communications Enablers for the Twenty-twenty Information Society,METIS)标准中分簇算法的不足进行改进,然后通过对功率时延谱求包络,来去除簇内射线及噪声对分簇结果的影响,在此基础上进行分簇会得到更加合理的结果.办公室环境下大规模虚拟天线阵列测试数据的分析结果表明,簇数目的变化量服从正态分布,经过不同时间簇数目变化量的均值和方差与二次函数较吻合.因此,将办公室场景下簇数目的变化量建模成均值和方差为二次函数的正态分布是合适的.
基金This work was supported by Universiti Teknologi Malaysia under TDR grant vote 05G20 and HiCOE grant vote 4J415.
文摘In this article an ultra-wideband rectangular Dielectric Resonator Antenna is designed for millimeter wave 5G frequency band applications.Indoor 5G communications require antenna system with wide bandwidth and high efficiency to enhance the throughput in the channel.To fulfill such requirements a Dielectric Resonator Antenna(DRA)is designed here which has achieved an ultra-wide bandwidth of 20.15%(22.32–27.56 GHz)which is 5.24 GHz of bandwidth centered at 26 GHz as resonating frequency.This covers the complete band 30(24.3–27.5 GHz)of 5G spectrum.26 and 28 GHz are considered as most popular frequencies in millimeter wave 5G communications.The aperture fed DRA designed here has also achieved an efficiency of 96 percentage with maximum radiation in the broadside direction(Phi=0,Theta=0).The measured gain of the DRA is 6.3 dB.The DRA designed here has dimensions of 0.25λ0×0.22λ0×0.12λ0.under the characteristic’s mode.The DRA is placed over a substrate with dimensions 0.5λ0×0.5λ0×0.02λ0.A cross slot aperture has been made on the ground plane which is placed above to the substrate.Here a full ground plane is used to resonate the antenna and is of similar dimension to the substrate.A microstrip line with two concentric rings makes an annular feed structure is used to excite the DRA and is placed below the substrate.The DRA is excited here in characteristics mode TE1Y1 and is the only mode of excitation.The DRA is linearly polarized,and the characteristic mode of excitation is maintained with 50 Ohm input impedance of the antenna.The DRA also gives here a good difference between the co-pol and cross pol approximately 15 to 20 dB.This antenna is more suitable for 5G indoor applications in millimeter wave frequency band centered at 26 GHz.
