Adaptive rate and power DS/CDMA communications in fading channels

Author

Kim, Sang Wu

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea

Volume

3

Issue

4

fYear

1999

fDate

4/1/1999 12:00:00 AM

Firstpage

85

Lastpage

87

Abstract

We investigate the average information rates attained by adapting the transmit power and the information rate relative to channel variations in code division multiple access communication systems. Our results show that the rate adaptation provides a higher average information rate than the power adaptation for a given average transmit power, and the rate increase when using rate adaptation is more significant for channels with a faster decaying multipath intensity profile and weaker line-of-sight component.

Keywords

adaptive control; cellular radio; code division multiple access; fading channels; interference suppression; multipath channels; multiuser channels; power control; radio transmitters; radiofrequency interference; spread spectrum communication; telecommunication control; time-varying channels; DS/CDMA communications; adaptive power control; adaptive transmit power; average information rate; average information rates; average transmit power; cellular systems; channel variations; code division multiple access; fading channels; line-of-sight component; multipath intensity profile; radio link; rate adaptation; signal to interference ratio; time-varying multipath fading; Delay effects; Fading; Information rates; Interference; Multiaccess communication; Nakagami distribution; Probability density function; Radio transmitters; Random variables; Rayleigh channels;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/4234.757196

Filename

757196