Title :
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
fDate :
4/1/2004 12:00:00 AM
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;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2004.826411
