Randomized Scheduler for Temporally-Correlated Channels

Author

Chan-Soo Hwang ; Wooyul Lee ; Cioffi, J.M.

Author_Institution

Dept. of Electr. Eng., Stanford Univ., CA, USA

Volume

3

fYear

2007

fDate

15-20 April 2007

Abstract

In a slowly time-varying fading broadcast channel, a proposed randomized scheduler achieves multi-user diversity gain while reducing the amount of feedback. The scheduler requests feedback of signal-to-noise ratios (SNR) from a random subset of users in conjunction with the previously scheduled user, and then selects the user with the largest SNR. With temporal correlation, this scheduler achieves near optimal sum-rate even with feedback from a small subset of users, which considerably reduces the amount of feedback.

Keywords

broadcast channels; diversity reception; fading channels; telecommunication network management; time-varying channels; multi-user diversity gain; near optimal sum-rate; random subset; randomized scheduler; signal-to-noise ratios; slowly time-varying fading broadcast channel; temporal correlation; temporally-correlated channels; Base stations; Broadcasting; Diversity methods; Fading; Feedback communications; Multiuser detection; Quantization; Signal to noise ratio; Switches; Throughput; Broadcast channels; Feedback communication; Multi-user diversity; Randomized algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2007. ICASSP 2007. IEEE International Conference on

Conference_Location

Honolulu, HI

ISSN

1520-6149

Print_ISBN

1-4244-0727-3

Type

conf

DOI

10.1109/ICASSP.2007.366462

Filename

4217636