Combined rate and power adaptation in DS/CDMA communications over Nakagami fading channels

Author

Kim, Sang Wu ; Lee, Ye Hoon

Author_Institution

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

Volume

48

Issue

1

fYear

2000

fDate

1/1/2000 12:00:00 AM

Firstpage

162

Lastpage

168

Abstract

We consider combined rate and power adaptations in direct-sequence code-division multiple-access communications, where the transmission power and the data rate are adapted relative to channel variations. We discuss the power gain that the combined adaptations provide over power adaptation. Then, we consider an integrated voice and data transmission system that offers a constant bit rate voice service, using power adaptation and a variable bit rate data service with rate adaptation. We present an expression for the required average transmission power of each traffic type having different quality-of-service specifications and discuss the capacity gain over power adaptation for voice and data

Keywords

channel capacity; code division multiple access; integrated voice/data communication; land mobile radio; multipath channels; multiuser channels; quality of service; spread spectrum communication; telecommunication traffic; BER; DS/CDMA communications; Nakagami fading channels; average transmission power; capacity gain; channel variations; constant bit rate voice service; direct-sequence code-division multiple-access; integrated voice/data transmission system; mobile radio; multipath fading; power adaptation; power gain; quality-of-service specifications; rate adaptation; traffic; transmission power; variable bit rate data service; Adaptive coding; Bit error rate; Bit rate; Data communication; Fading; Helium; Multiaccess communication; Quality of service; Radio link; Radio transmitters;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.818884

Filename

818884