Power and Rate Control With Outage Constraints in CDMA Wireless Networks

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Executive Summary

"In this paper, the authors propose an approach to allocate the users' powers to maximize the throughput of a CDMA wireless system. A general model of the physical layer is considered, with Rayleigh-lognormal fading and source activity, and quality of service is expressed by the outage probability. The problem is cast as a mixed integer-real optimization program, where they express the constraints by a moment matching approximation of the outage probability. The optimal solution of the problem is derived in two steps: first a modified program is investigated to provide feasible solutions, and then an algorithm, based on branch-and-bound search, is used. Numerical results in scenarios of practical interest confirm the validity of their approach, and show that the optimal solution of the problem is achieved with low computational complexity. "

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