Downlink throughput optimization for wideband CDMA systems

Author

Kahn, Simon ; Gurcan, Mustafa K. ; Oyefuga, Oladipupo O.

Author_Institution

Dept. of Electr. & Electron. Eng., Imperial Coll. London, UK

Volume

7

Issue

5

fYear

2003

fDate

5/1/2003 12:00:00 AM

Firstpage

251

Lastpage

253

Abstract

This article examines the optimization of throughput in a wireless system. A mathematical model is outlined for a cellular wideband CDMA system. In practical cases, where the maximum transmission power is constrained, power control may not be possible. Self-interference limits the total deliverable rate. It is shown that by optimally allocating bit-rate using a dynamic programming algorithm, a higher bit-rate can be delivered within the same power constraint. Simulation results show on average a 20% increase in total delivered rate can be achieved.

Keywords

broadband networks; cellular radio; code division multiple access; dynamic programming; multiuser channels; radio links; radio networks; radiofrequency interference; cellular wideband CDMA system; downlink throughput optimization; dynamic programming algorithm; mathematical model; maximum transmission power; optimal bit rate allocation; power constraint; power control; self-interference; simulation results; total deliverable rate; wireless system; Base stations; Downlink; Dynamic programming; Heuristic algorithms; Interference constraints; Multiaccess communication; Power control; Power system modeling; Throughput; Wideband;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2003.812173

Filename

1200199