DocumentCode :
2808732
Title :
User ordering and power allocation for optimal multiantenna precoding/decoding
Author :
Schubert, Martin ; Boche, Holger
Author_Institution :
Fraunhofer Sino-German Lab., Mobile Commun. MCI, Berlin
fYear :
2004
fDate :
18-19 March 2004
Firstpage :
174
Lastpage :
181
Abstract :
The performance of multiuser beamforming combined with "dirty paper" precoding (downlink) or successive interference cancellation (uplink) depends on the precoding (resp. decoding) order. In this paper we propose an improved algorithm for jointly computing the power allocation and beamformers with minimal total power. Neither matrix inversion nor eigenvalue decomposition is required to compute the global optimum. Then, the optimal precoding order is studied. A fundamental understanding of joint precoding and power allocation will be an important prerequisite for the development of transmit scheduling algorithms
Keywords :
antenna arrays; channel coding; decoding; eigenvalues and eigenfunctions; interference suppression; matrix inversion; multiuser channels; radiofrequency interference; scheduling; dirty paper precoding; eigenvalue decomposition; matrix inversion; multiantenna precoding-decoding; multiuser beamforming; optimal precoding order; power allocation; successive interference cancellation; transmit scheduling algorithms; Array signal processing; Base stations; Decoding; Downlink; Interference cancellation; Iterative algorithms; Power control; Signal processing; Signal processing algorithms; Signal to noise ratio;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Smart Antennas, 2004. ITG Workshop on
Conference_Location :
Munich
Print_ISBN :
0-7803-8327-3
Type :
conf
DOI :
10.1109/WSA.2004.1407665
Filename :
1407665
Link To Document :
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