The impact of antenna diversity in packet data systems with scheduling

Author

Viswanathan, Harish ; Venkatesan, Sivarama

Author_Institution

Lucent Technol. Bell Labs., Murray Hill, NJ, USA

Volume

52

Issue

4

fYear

2004

fDate

4/1/2004 12:00:00 AM

Firstpage

546

Lastpage

549

Abstract

It has been observed through simulations of some specific scheduling algorithms that multiuser diversity gains in packet data systems with channel-aware scheduling can be reduced in the presence of any form of link diversity, such as transmit antenna diversity or wideband multipath diversity. We establish that asymptotically, in the limit of large number of transmit antennas and users, the maximum throughput achieved by any optimal scheduling algorithm in the presence of transmit diversity under signal-to-noise-ratio-only feedback can be infinitely worse than that of a system with no diversity. Our results are general and are independent of any particular scheduling algorithm.

Keywords

data communication; diversity reception; multipath channels; multiuser detection; scheduling; transmitting antennas; channel-aware scheduling; multiuser diversity gains; packet data system; transmit antenna diversity; wideband multipath diversity; Base stations; Broadband antennas; Data systems; Downlink; Optimal scheduling; Rayleigh channels; Scheduling algorithm; Signal to noise ratio; Throughput; Transmitting antennas;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2004.826411

Filename

1291793