Channel modeling for the stationary UE scenario
Channel modeling for the stationary UE scenario
复制标题
固定 UE 场景的信道建模
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
F. Harrysson
中科院分区：
文献类型：
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作者：
J. Medbø;F. Harrysson
这里已经示出，静止UE场景与移动UE场景根本不同。主要区别在于，在丰富散射环境中，静止UE的时间衰落通常非常小，具有大K值（K>10dB）的莱斯统计。这与传统的信道建模场景形成对比，在传统的信道建模场景中，UE正在移动并且时间衰落表现出瑞利统计。此外，简单和直接的时间信道建模，这方便地可以添加到标准的基于射线的信道模型，提出并成功地通过测量验证。所提出的建模是简单的，因此有一定的局限性。首先，该模型假设散射波起源于散射体中心的单个点。此外，没有考虑到散射波本身被环境中的物体反射。如果例如使用波束成形技术来消除时间变化贡献，则这可能具有一些负面影响。第二，该模型仅根据几个衡量的情景进行了评估。为了评估模型是否通常有效，必须在不同场景（诸如宏小区、室外、购物中心等）中执行更多测量。
It has herein been shown that the stationary UE scenario is radically different from the moving UE scenario. The main difference is that the temporal fading for a stationary UE, in a rich scattering environment, is typically very small having Ricean statistics with large K values (K>10dB). This is in contrast to the traditional channel modeling scenario in which the UE is moving and the temporal fading exhibits Rayleigh statistics. Further, simple and straightforward temporal channel modeling, which conveniently may be added to standard ray based channel models, is presented and also successfully validated by measurements. The proposed modeling is simple and has thus some limitations. Firstly the model assumes that the scattered waves originate from a single point at the centre of the scatterer. Moreover, it is not taken into account that the scattered waves themselves are reflected off objects in the environment. This might have some negative impact if e.g. beamforming techniques are used to null out the temporal varying contribution. Secondly, the model has only been evaluated based on a few measured scenarios. In order to assess if the model is generally valid more measurements in different scenarios such as macrocell, outdoor, shopping mall etc. have to be performed.