Power control using Steffensen iterations for CDMA systems with beamforming or multiuser detection
Power control using Steffensen iterations for CDMA systems with beamforming or multiuser detection
We present an accelerated power control algorithm applicable for CDMA based communications systems employing advanced uplink receiver techniques such as beamforming or multiuser detection. The proposed algorithm operates a fixed point power control algorithm accelerated by utilizing Aitken's Δ2-process (also known as Steffensen's method) that is merged with linear MMSE filtering. The linear MMSE filter either performs beamforming or multiuser detection. The proposed algorithm shows asymptotically quadratic convergence and is benchmarked against Newton's method. We further evaluate a lower bound on the Lipshitz constant which can be used to ensure convergence of the proposed algorithm. Numerical results are given for a fully deployed sectorized UMTS network with MMSE multiuser detection. Beside its employment within CDMA based communication systems, the proposed algorithm can also be utilized for the acceleration of computational intensive network simulations.
Aitken's Process, Beamforming, Jakobi Iteration, Lipshitz Continuous, Multiuser Detection, Power Control, Steffensen Iteration
2323-2327
Leibig, Christoph
c5977dfc-2c99-4607-87a9-cd3df3ea752c
Dekorsy, Armin
be243cd2-a585-48ff-b701-da153098bf5d
Fliege, Jörg
54978787-a271-4f70-8494-3c701c893d98
2005
Leibig, Christoph
c5977dfc-2c99-4607-87a9-cd3df3ea752c
Dekorsy, Armin
be243cd2-a585-48ff-b701-da153098bf5d
Fliege, Jörg
54978787-a271-4f70-8494-3c701c893d98
Leibig, Christoph, Dekorsy, Armin and Fliege, Jörg
(2005)
Power control using Steffensen iterations for CDMA systems with beamforming or multiuser detection.
IEEE International Conference on Communications, 4, .
Abstract
We present an accelerated power control algorithm applicable for CDMA based communications systems employing advanced uplink receiver techniques such as beamforming or multiuser detection. The proposed algorithm operates a fixed point power control algorithm accelerated by utilizing Aitken's Δ2-process (also known as Steffensen's method) that is merged with linear MMSE filtering. The linear MMSE filter either performs beamforming or multiuser detection. The proposed algorithm shows asymptotically quadratic convergence and is benchmarked against Newton's method. We further evaluate a lower bound on the Lipshitz constant which can be used to ensure convergence of the proposed algorithm. Numerical results are given for a fully deployed sectorized UMTS network with MMSE multiuser detection. Beside its employment within CDMA based communication systems, the proposed algorithm can also be utilized for the acceleration of computational intensive network simulations.
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Published date: 2005
Venue - Dates:
2005 IEEE International Conference on Communications, ICC 2005, , Seoul, Korea, Republic of, 2005-05-16 - 2005-05-20
Keywords:
Aitken's Process, Beamforming, Jakobi Iteration, Lipshitz Continuous, Multiuser Detection, Power Control, Steffensen Iteration
Identifiers
Local EPrints ID: 482544
URI: http://eprints.soton.ac.uk/id/eprint/482544
ISSN: 0536-1486
PURE UUID: c1a4db33-1208-4cad-9be8-9b4bc007023d
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Date deposited: 10 Oct 2023 16:52
Last modified: 11 Oct 2023 01:40
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Contributors
Author:
Christoph Leibig
Author:
Armin Dekorsy
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