An Adaptive Power and Bit Allocation Algorithm for Multiple User MIMO OFDM System Employing Zero-Forcing Multi-user Detection

Uthansakul, P; Bialkowski, ME

An Adaptive Power and Bit Allocation Algorithm for Multiple User MIMO OFDM System Employing Zero-Forcing Multi-user Detection

Uthansakul, P Bialkowski, ME

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Publication Type:: Conference
Issue Date:: 2007-03-12T22:05:39Z

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Field	Value	Language
dc.contributor.author	Uthansakul, P	en_AU
dc.contributor.author	Bialkowski, ME	en_AU
dc.date.accessioned	2007-03-12T22:05:39Z
dc.date.accessioned	2012-12-15T02:29:41Z
dc.date.available	2007-03-12T22:05:39Z
dc.date.available	2012-12-15T02:29:41Z
dc.date.issued	2007-03-12T22:05:39Z
dc.identifier.uri	http://hdl.handle.net/10453/19645
dc.description.abstract	This paper describes an adaptive algorithm for power and bit allocations in a multiple user Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing (MIMO OFDM) system operating in a frequency selective fading channel. The zero forcing (ZF) technique is applied to accomplish multi user detection (MUD). The proposed adaptive algorithm employs a Lagrange multiplier method, which provides an optimal solution for power and bit allocations in one step. This is of considerable advantage in comparison with alternative algorithms, such as the greedy algorithm, that require time-consuming iterative procedures. The simulation results for both perfect and partial channel state information (CSI) available to transmitter show that the algorithm operates successfully in multiple user access scenarios without scarifying power and diversity gain.	en_AU
dc.format.extent	451616 bytes
dc.format.mimetype	application/pdf
dc.language.iso	en_AU
dc.relation.replaces	http://hdl.handle.net/2100/112
dc.title	An Adaptive Power and Bit Allocation Algorithm for Multiple User MIMO OFDM System Employing Zero-Forcing Multi-user Detection	en_AU
dc.type	Conference
utslib.copyright.status	open_access

Abstract:

This paper describes an adaptive algorithm for power and bit allocations in a multiple user Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing (MIMO OFDM) system operating in a frequency selective fading channel. The zero forcing (ZF) technique is applied to accomplish multi user detection (MUD). The proposed adaptive algorithm employs a Lagrange multiplier method, which provides an optimal solution for power and bit allocations in one step. This is of considerable advantage in comparison with alternative algorithms, such as the greedy algorithm, that require time-consuming iterative procedures. The simulation results for both perfect and partial channel state information (CSI) available to transmitter show that the algorithm operates successfully in multiple user access scenarios without scarifying power and diversity gain.

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http://hdl.handle.net/10453/19645