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The Capacity Gain from Base Station Cooperative Scheduling in a MIMO DPC Cellular System

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2 Author(s)
Wan Choi ; Wireless Networking and Communications Group, Department of Electrical and Computer Engineering, The University of Texas at Austin, Texas 78712. Email: wchoi@mail.utexas.edu ; Jeffrey G. Andrews

As an alternative to traditional static frequency reuse patterns, this paper investigates cooperatively scheduling among neighboring base stations in a cellular multiple antenna system, where each cell adopts dirty paper coding. It is shown that cooperatively scheduled transmission can achieve almost the same amount of interference reduction as conventional frequency reuse and achieve an extra capacity gain. We analytically quantify the capacity gain of cooperatively scheduled transmission over conventional frequency reuse in an Mt times Mr dirty paper coded MIMO system. The theoretical analysis of this paper also provides an altered view of multiuser diversity in the context of a multi-cell system. Because the positions of the users are important in a multi-cell system, we find that the gain is O(radiclog K), from selecting the maximum of a compound lognormal-exponential distribution, whereas multiuser diversity capacity gain has been previously known to grow as O(log log K), from selecting the maximum of K exponentially-distributed powers

Published in:

2006 IEEE International Symposium on Information Theory

Date of Conference:

9-14 July 2006