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Co-channel Interference Mitigation via Joint Frequency and Space Domains Base Station Cooperation for Multi-Cell OFDMA Systems

Yizhen JIA, Xiaoming TAO, Youzheng WANG, Yukui PEI, Jianhua LU

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Summary :

Base Station (BS) cooperation has been considered as a promising technology to mitigate co-channel interference (CCI), yielding great capacity improvement in cellular systems. In this paper, by combining frequency domain cooperation and space domain cooperation together, we design a new CCI mitigation scheme to maximize the total utility for a multi-cell OFDMA network. The scheme formulates the CCI mitigation problem as a mixture integer programming problem, which involves a joint user-set-oriented subcarrier assignment and power allocation. A computationally feasible algorithm based on Lagrange dual decomposition is derived to evaluate the optimal value of the problem. Moreover, a low-complexity suboptimal algorithm is also presented. Simulation results show that our scheme outperforms the counterparts incorporating BS cooperation in a single domain considerably, and the proposed low-complexity algorithm achieves near optimal performance.

Publication
IEICE TRANSACTIONS on Communications Vol.E93-B No.12 pp.3469-3479
Publication Date
2010/12/01
Publicized
Online ISSN
1745-1345
DOI
10.1587/transcom.E93.B.3469
Type of Manuscript
Special Section PAPER (Special Section on Wireless Distributed Networks)
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