Optimum sir balancing using extended 1-norm beamforming optimization

Bibliographic Details
Authors and Corporations: Boche, Holger, Schubert, Martin
Title: Optimum sir balancing using extended 1-norm beamforming optimization
In: 2002 IEEE International Conference on Acoustics, Speech, and Signal Processing, 3, 2002, p. III-2945-III-2948
Physical Description:III-2945-III-2948
ISSN/ISBN: 0-7803-7402-9
ISSN/ISBN: 0-7803-7402-9
Summary:We address the problem of joint downlink beamforming and power control in a wireless cellular system, where several users share the same time slot and the same frequency band. In order to enable a fair sharing of resources among all users, the SIR levels should be balanced by minimizing the ∞-norm of a certain vector. To this end, Gerlach and Paulraj [1] proposed an iterative algorithm, which is based on a 1-norm cost function. It has been observed that this algorithm approximates the optimum ∞-norm solution. In this paper we characterize the case where this algorithm is optimal. The analytical results are used to develop a new algorithm, which always converges to the optimum ∞-norm solution, regardless of the chosen initialization. A proof of convergence is given.
Type of Resource:E-Article
Source:IEEE Xplore Library
Language: English