Spectral efficiency of adaptive hybrid DS/FFH CDMA in Rayleigh fading

Author

Varzakas, P. ; Tombras, G.S.

Author_Institution

Lab. of Electron., Athens Univ., Greece

Volume

39

Issue

1

fYear

2003

Firstpage

145

Lastpage

147

Abstract

The spectral efficiency of an adaptive hybrid direct-sequence/fast frequency hopping code-division multiple-access (DS/FFH-CDMA) system operating in Rayleigh fading is estimated in terms of the theoretically achievable average channel capacity (in the Shannon sense) per user. The work covers the operation of the examined adaptive hybrid DS/FFH-CDMA system over a broadcast communication randomly time-varying channel applicable to the downlink of satellites, wireless local area networks and single-cell indoor mobile systems and leads to a closed-form expression for the achieved spectral efficiency.

Keywords

Rayleigh channels; broadcast channels; channel capacity; code division multiple access; diversity reception; frequency hop communication; mobile radio; spread spectrum communication; time-varying channels; Rayleigh fading; adaptive hybrid DS/FFH CDMA; broadcast communication channel; channel capacity; closed-form expression; code-division multiple-access; direct-sequence/fast frequency hopping; mobile radio; randomly time-varying channel; satellite downlink; single-cell indoor mobile systems; spectral efficiency; wireless local area networks;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el:20030040

Filename

1182407