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Base Station Cooperations Under Imperfect Conditions

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Coordinated Multipoint (CoMP); Joint precoding/processing; Network MIMO; Virtual MIMO


Base station (BS) cooperation is a technique by which multiple BSs simultaneously serve multiple user equipments (UEs) in the same frequency band using networked multiple-input-multiple-output (MIMO) protocol. Figure 1 illustrates a simple example of BS cooperation with two BSs and two UEs. The BSs exchange channel state information (CSI) and UEs’ data for cooperation via a central controller. Each BS conveys the desired signals of both UEs as shown by the red and blue arrows, respectively. Different from the conventional MIMO technique, BS cooperation is subject to per-BS power constraints instead of a sum power constraint. Suppose M single-antenna BSs cooperatively serve N single-antenna UEs in the downlink, the system model can be expressed as

$$\displaystyle \begin{aligned} \boldsymbol{y} = \mathbf{H}\boldsymbol{x} + \boldsymbol{n}, \end{aligned} $$

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Fig. 1


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Correspondence to Jie Gong .

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Gong, J. (2018). Base Station Cooperations Under Imperfect Conditions. In: Shen, X., Lin, X., Zhang, K. (eds) Encyclopedia of Wireless Networks. Springer, Cham.

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  • Print ISBN: 978-3-319-32903-1

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