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Fast Converging Algorithm for Weighted Sum Rate Maximization in Multicell MISO Downlink

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4 Author(s)
Tran, L. ; Dept. Commun. Eng., Univ. of Oulu, Oulu, Finland ; Hanif, M.F. ; Tolli, A. ; Juntti, M.

The problem of maximizing weighted sum rates in the downlink of a multicell environment is of considerable interest. Unfortunately, this problem is known to be NP-hard. For the case of multi-antenna base stations and single antenna mobile terminals, we devise a low complexity, fast and provably convergent algorithm that locally optimizes the weighted sum rate in the downlink of the system. In particular, we derive an iterative second-order cone program formulation of the weighted sum rate maximization problem. The algorithm converges to a local optimum within a few iterations. Superior performance of the proposed approach is established by numerically comparing it to other known solutions.

Published in:

Signal Processing Letters, IEEE  (Volume:19 ,  Issue: 12 )