Review of wideband MIMO channel measurement and modeling for IMT-Advanced systems
Review of wideband MIMO channel measurement and modeling for IMT-Advanced systems
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DOI：
10.1007/s11434-012-5203-2
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发表时间：
2012-06
影响因子：
--
通讯作者：
Jian-hua Zhang
中科院分区：
文献类型：
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作者：
Jian-hua Zhang
2005年10月，下一代移动的通信系统被国际电联无线电通信部门（ITU-R）正式命名为高级国际移动的通信系统（IMT-Advanced）。多传播环境下的宽带多输入多输出（MIMO）信道模型是IMT-Advanced系统的基础，并且自2003年以来已经开始了这样的研究。研究的挑战来自于这样一个事实，即更宽的带宽（20-100 MHz）和先进的多天线技术已被提出的IMT-Advanced系统，从而导致更高的采样率和多个空间传播信道。本文从四个方面对宽带MIMO信道测量和建模进行了综述：（1）无线信道测量方法和设备;（2）大尺度衰落模型;（3）小尺度衰落模型;（4）MIMO信道模型。特别是，大规模衰落的载波频率的影响进行了研究，城市宏蜂窝，它表明，更高的载波频率的结果在更大的损失的非视距（NLoS）条件下，在中国的城市，其中的频率相关因子为32.1。此外，密集和明显较高的建筑物也导致较大的角度扩展（AS）的到达角和离开角在城市宏小区的情况下。结果表明，有潜力探索MIMO技术的IMT-Advanced系统与更大的AS，这将导致高的系统容量。介绍了MIMO模型的研究进展，提出了基于几何的随机信道模型的简化方法。最后指出了未来信道测量和建模的研究方向。
In October 2005, the next generation mobile communication system was officially named as the International Mobile Telecommunications-Advanced (IMT-Advanced) by the ITU Radiocommunication Sector (ITU-R). Wideband multiple input and multiple output (MIMO) channel models in multiple propagation environments are fundamental for IMT-Advanced systems and such research has been initiated since 2003. The research challenges come from the fact that the wider bandwidth (20–100 MHz) and the advanced multiple antenna technology have been proposed for the IMT-Advanced system, thus leading to higher sampling rates and multiple spatial propagation channels. In this review, four aspects of wideband MIMO channel measurement and modeling are discussed: (1) radio channel measurement procedure and equipment; (2) large scale fading models; (3) small scale fading models; and (4) MIMO channel models. In particular, the large scale fading affected by the carrier frequency is investigated for urban macrocells and it shows that the higher carrier frequency results in greater loss for non-line-of-sight (NLoS) conditions in the cities of China, for which the frequency dependent factor is 32.1. Moreover, the dense and the obviously higher buildings also lead to a larger angle spread (AS) of both the angle of arrival and angle of departure in urban macrocell scenarios. The results indicate that there is the potential to explore the MIMO technique for an IMT-Advanced system with larger ASs, which would lead to the high system capacity. The progress on MIMO models is described and some methods for simplifying geometry-based stochastic channel models (GBSM) are proposed. Finally future research topics on channel measurement and modeling are identified.