Performance analysis of multi-user scheduling over time-varying channel

Author

Sun, Huan ; Wang, Dongming ; Xie, Yaqin ; You, Xiaohu

Author_Institution

Nat. Mobile Commun. Res. Lab., Southeast Univ., Nanjing

fYear

2008

fDate

25-27 May 2008

Firstpage

144

Lastpage

147

Abstract

The sum-rate capacity of downlink channel can be significantly improved via optimal multi-user scheduling. However, in the time-varying channel, the optimal scheduling is difficult to be implemented when the dedicated feedback link existing delay. In this paper, the performance of multi-user scheduling over time-varying channel is investigated, and an analytical expression of sum-rate capacity is derived. In order to overcome the negative effect of feedback delay on system performance, an improved user scheduling is proposed based on the predicted best channel quality. Numerical simulation results demonstrate the proposed user scheduling can effectively improve the system performance, even the predictor order is 2.

Keywords

multiuser channels; radio links; scheduling; time-varying systems; dedicated feedback link; downlink channel; feedback delay; negative effect; optimal multiuser scheduling; performance analysis; sum rate capacity; time varying channel; Channel capacity; Delay effects; Delay systems; Downlink; Negative feedback; Numerical simulation; Optimal scheduling; Performance analysis; System performance; Time-varying channels;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Circuits and Systems, 2008. ICCCAS 2008. International Conference on

Conference_Location

Fujian

Print_ISBN

978-1-4244-2063-6

Electronic_ISBN

978-1-4244-2064-3

Type

conf

DOI

10.1109/ICCCAS.2008.4657746

Filename

4657746