计算机科学 ›› 2020, Vol. 47 ›› Issue (6): 271-275.doi: 10.11896/jsjkx.190500022
陈钱1, 周杰1, 邵根富2
CHEN Qian1, ZHOU Jie1, SHAO Gen-fu2
摘要: 针对任意散射环境信道,文中提出基于角度域任意功率谱PDF的基函数采样近似拟合算法,并以小角度扩展拟合等效大角度域扩展,计算并导出各种拟合以及实测数据情况下的无线信道衰落相关性(Spatial Fading Correlation,SFC)特征,重建了MIMO多输入多输出系统的信道参数模型。首先,研究小角度扩展功率谱PDF在Sinc分布、高斯分布以及拉普拉斯分布下的SFC闭合表达式,以基于任意角度域采样拟合方法来简化近似评估模型;然后,以常见的信道Von Mises分布数据为参考,拟合获取其在角度域下MIMO多天线SFC近似简化解;最后,通过计算和仿真实验得出近似计算法在特定条件下具有很好的拟合度,详细讨论了大角度扩展模型中的基函数采样数目和加权系数的选取依据及其拟合精度。结果表明,文中所提计算方法可准确地拟合对MIMO多天线系统分析时的适用性和计算效率,能降低理论计算的复杂性,可满足实际信道建模及Massive MIMO阵列设计的精度需求,且可提高性能和计算效率。
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[1]LI W,NIE Z P.Airspace Correlation Evaluation of Fading Signals in MIMO Channels[J].Chinese Journal of Electronics,2004,32(12):1949-1953. [2]JIANG K L,CHEN X M,ZHU Q M.Non-stationary MIMO channel construction and parameter evolution method for 3D scenes[J].Journal of Applied Sciences,2018,36(5):56-68. [3]LUO N.Analysis of the Influence of Spatial Correlation on MIMO Communication[J].Electronic Technology Application,2014,40(10):1-7. [4]ZHOU J,ZOU S J,CHEN Z.Fading-correlation channel approximation algorithm and its Massive MIMO system analysis[J].Journal of Xinjiang University(Natural Science),2018,35(3):100-111. [5]ZHOU J,WANG Y L,KIKUCHI K.Approximate algorithm for spatial fading correlation of multi-antenna channel and its complexity[J].Acta Physica Sinica,2014,63(23):1-12. [6]ZHU Q M,XU D Z,LUO Y Q,et al.A Simplified Model for Spatial Correlation Evaluation of Multiple Input Multiple Output Channels[J].Chinese Journal of Radio Science,2011,26(2):203-208. [7]GAO K,ZHANG E Y.Spatial Correlation Properties and Channel Capacity Analysis of MIMO Channels[J].Journal of Electronics & Information Technology,2007,29(7):1542-1545. [8]ZHU Q M,XUE C W,YANG Y.Research on Spatial Correlation of Antenna Arrays in 3D Propagation Environment[J].Systems Engineering and Electronics,2017(9):1-8. [9]LEE W C Y.Effects on correlation between two mobile radio base-station antennas[J].IEEE IEEE Transactions on Communications,1973,COM-21(11):1214-1224. [10]GRADSHT E,RYZH K.Table of integrals,series and products[M].USA:Academic Press,1980. [11]TSAI J A,BUEHRER R M,WOERNER B D.Spatial fading correlation function of circular antenna arrays with Laplacian energy distribution[J].Communications Letters IEEE,2002,6(5):178-180. [12]HSIEH P C,CHEN F C.A new MIMO spatial correlation approximation of large angular spread[C]//Antennas & Propagation Society International Symposium.IEEE,2007. [13]CHUANG J T,CHEN F C.Comparison of MIMO spatial correlation approximations under large angular spread[C]//Antennas & Propagation Society International Symposium.IEEE,2008. [14]SIESKUL B T,KUPFERSCHMIDT C,KAISER T.Spatial fading correlation for semicircular scattering:Angular spread and spatial frequency approximations[C]//International Conference on Communications & Electronics.IEEE,2010. [15]TEAL P D,ABHAYAPALA T D,KENNEDY R A.Spatial correlation for general distributions of scatterers[J].IEEE Signal Processing Letters,2002,9(10):305-308. [16]ZHOU J,CAO Z G,KIKUCHI H.Analysis of MIMO antenna array based on 3D Von Mises Fisher distribution[J].Journal of China Universities of Posts and Telecommunications,2015,22(2):1-12. [17]YONG S K,HONPSON J S.Three dimensional spatial fading correlation model for compact MIMO receivers[J].IEEE Trans.Wireless Communications,2005,4(6):2856-2869. [18]GUTIERREZ C A,PATZOLD M.Sum of sinusoids based simulation of flat fading wireless propagation channels under non-Isotropic scattering conditions[C]//Global Telecommunications Conference.IEEE,2007:3842-3846. [19]GRADSHTEYN I S,RYZHIK I M.Table of integrals,series and products[J].Mathematics of Computation,2007,20(96):1157-1160. |
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