三维移动-移动场景非平稳MIMO信道空时相关性
Spatial-Temporal Correlation of Non-stationary MIMO Channels under 3D Mobile-Mobile Scenario
  
DOI:
中文关键词:  非平稳信道,多输入多输出信道,移动-移动场景,空时相关性
英文关键词:non-stationary channel, multiple-input multiple-output channel, mobile-mobile scenario, spatial-temporal correlation
基金项目:国家重大科学仪器设备开发专项(2013YQ200607);江苏省博士后基金资助(1601017C);中央高校基本科研业务费青年科技创新基金(NS2015046, NS2016044);江苏省物联网与控制技术重点实验室基金(NJ20160027);南京航空航天大学研究生创新基地(实验室)开放基金(kfjj20170405)
作者单位
杨 颖1, 朱秋明1,2, 陈小敏1, 李伟东1, 陈应兵3 1. 南京航空航天大学江苏省物联网与控制技术重点实验室, 南京 211100
2. 英国赫瑞瓦特大学工程与物理科学学院,爱丁堡 EH14 4AS,英国
3. 中国电子科技集团公司第四十一研究所,青岛 233006 
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中文摘要:
      提出一种三维移动-移动场景的非平稳多输入多输出(multi-input multi-output, MIMO)信道模型,该模型改进了不同信道状态之间衰落相位的连续性,可保证输出多普勒频移的正确性。同时,针对该新模型研究了非平稳衰落特性引起的时变空时相关性,并针对收发端信号角度谱服从通用Von Mises Fisher(VMF)分布情况,详细推导了归一化空域互相关函数和时域自相关函数的表达式。最后,针对低速和高速移动两种场景的仿真结果表明,获得的理论结果与数值仿真具有很好的拟合度, 但能极大地减低计算复杂性,进而有效提高了分析和仿真复杂动态场景下MIMO 通信系统的效率。
英文摘要:
      In this paper, we proposed a modified non-stationary multi-input multi-output (MIMO) channel model for 3D mobile-to-mobile scenario. The continuity of fading phase between different channel states is taken into account, which can guarantee more realistic Doppler frequency shifts. Meanwhile, this paper investigates the time-variant spatialtemporal correlation properties of the proposed model. For the power angle spectrum (PAS) of the transmitter and receiver following Von Mises Fisher (VMF) distribution, the expressions of the spatial cross-correlation function (CCF) and temporal auto-correlation function (ACF) are derived. Simulation results of low-speed and high-speed scenarios show an excellent agreement between derived theoretical and simulated results. Our analytical expressions can greatly reduce the computational complexity, and significantly improve the efficiency of analysis and simulation of MIMO communication systems under complex and dynamic scenarios.
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