DocumentCode :
3248941
Title :
Impact of User Mobility and Asymmetry on Multiuser Scheduler Performance
Author :
Zhan, Pengcheng ; Annavajjala, Ramesh ; Swindlehurst, A. Lee
Author_Institution :
Brigham Young Univ., Provo
fYear :
2007
fDate :
4-7 Nov. 2007
Firstpage :
1181
Lastpage :
1185
Abstract :
In this paper, we are concerned with the performance of multiuser schedulers over an asymmetric network, where different users in the network have different average received signal-to-noise ratios (SNRs) and Doppler spreads. The throughput, in terms of the ergodic capacity of the channel, of a maximum-SNR scheduler (i.e., the scheduler that schedules the user with the largest instantaneous SNR) is investigated over Rayleigh fading channels with single- antenna base station and user terminals. Closed-form expressions are presented to quantify the degradation in maximum- SNR scheduler performance due to lack of the knowledge of the CSI. For an asymmetric network with a small number of users, a new simple scheduler, which does not require instantaneous CSI, is proposed, and its optimality is discussed.
Keywords :
Rayleigh channels; channel capacity; signal processing; Doppler spread; Rayleigh fading channel; asymmetric network; ergodic capacity; maximum-SNR scheduler; multiuser scheduler performance; signal-to-noise ratio; Base stations; Channel capacity; Decorrelation; Degradation; Fading; Multiuser detection; Performance loss; Processor scheduling; Signal to noise ratio; Throughput; Doppler spread; Multiuser diversity; channel-aware schedulers; fading decorrelation; proportional fair;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signals, Systems and Computers, 2007. ACSSC 2007. Conference Record of the Forty-First Asilomar Conference on
Conference_Location :
Pacific Grove, CA
ISSN :
1058-6393
Print_ISBN :
978-1-4244-2109-1
Electronic_ISBN :
1058-6393
Type :
conf
DOI :
10.1109/ACSSC.2007.4487410
Filename :
4487410
Link To Document :
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