Coordinated linear beamforming in downlink multi-cell wireless networks

We consider the problem of co-channel interference mitigation in a downlink multi-cell wireless network. Assuming that each access point serves multiple single-antenna mobiles via space division multiple access (SDMA), we jointly optimize the linear beam-vectors across a set of coordinated cells and...

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Bibliographic Details
Published in2008 42nd Asilomar Conference on Signals, Systems and Computers pp. 356 - 360
Main Authors Venturino, L., Prasad, N., Xiaodong Wang
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2008
Subjects
Array signal processing
Base stations
Downlink
Electronic mail
Femtocell networks
Interference
Iterative algorithms
Multiaccess communication
Signal processing algorithms
Wireless networks
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ISBN9781424429400
1424429404
ISSN1058-6393
DOI10.1109/ACSSC.2008.5074424

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Summary:We consider the problem of co-channel interference mitigation in a downlink multi-cell wireless network. Assuming that each access point serves multiple single-antenna mobiles via space division multiple access (SDMA), we jointly optimize the linear beam-vectors across a set of coordinated cells and resource slots: the objective function to be maximized is the weighted system sum-rate subject to per-base-station power constraints. After deriving the general structure of the optimal beam-vectors, a novel iterative algorithm is presented which attempts to solve the Karush-Kuhn-Tucker (KKT) conditions of the non-convex primal problem at hand. Simulation results are provided to assess the performance of the proposed algorithm.
ISBN:9781424429400
1424429404
ISSN:1058-6393
DOI:10.1109/ACSSC.2008.5074424