DocumentCode :
1901605
Title :
Multiuser spatial scheduling in the downlink of wireless systems
Author :
Bartolomé, Diego ; Perez-Neira, A.I.
Author_Institution :
Centre Tecnologic de Telecomunicacions de Catalunya, Barcelona, Spain
fYear :
2004
fDate :
18-21 July 2004
Firstpage :
706
Lastpage :
710
Abstract :
Optimizing a communication of a Q-antenna access point (AP) with K single antenna terminals is not straightforward. Since a global optimization might not be solvable in real time, the AP has several alternatives involving both the physical layer, e.g. beam-forming and power/bit allocation, and the DLC, such as scheduling. The purpose of this paper is twofold. First, for K≤Q we compare traditional bit allocation strategies with a novel modified approach, especially in terms of fairness. Second, we focus on the combinatorial problem that arises when K>Q, and propose several alternatives for the scheduling of the users into groups, which is done together with the bit allocation. Simulations show that better performance is obtained at the expense of complexity.
Keywords :
antennas; channel allocation; combinatorial mathematics; multiuser channels; optimisation; radio access networks; radio links; scheduling; Q-antenna access point; antenna terminal; bit allocation; combinatorial problem; downlink wireless system; multiuser spatial scheduling; optimization; physical layer; Array signal processing; Bit error rate; Bit rate; Broadcasting; Constraint optimization; Covariance matrix; Downlink; Physical layer; Processor scheduling; Signal mapping;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Sensor Array and Multichannel Signal Processing Workshop Proceedings, 2004
Print_ISBN :
0-7803-8545-4
Type :
conf
DOI :
10.1109/SAM.2004.1503041
Filename :
1503041
Link To Document :
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