The issue of spreading in multipath time-varying channels

Author

Médard, Muriel ; Gallager, Robert G.

Author_Institution

Lab. for Inf. & Decision Syst., MIT, Cambridge, MA, USA

Volume

1

fYear

1995

fDate

25-28 Jul 1995

Firstpage

1

Abstract

The capacity of a multiple-access, time-varying but known multipath channel is considered in the presence of white Gaussian noise, a bandwidth constraint, and power constraints. It is assumed that the product of the time spread and the Doppler spread is small. The general case is specialized to particular cases such as flat fading and specular paths with fixed Doppler shifts. The results provide insight into questions of CDMA and orthogonal systems

Keywords

Doppler effect; Doppler shift; Gaussian channels; channel capacity; code division multiple access; fading; mobile communication; multipath channels; radiowave propagation; spread spectrum communication; time-varying channels; CDMA; Doppler spread; bandwidth constraint; channel capacity; fixed Doppler shifts; flat fading; mobile communications; multipath time-varying channels; multiple-access system; orthogonal systems; power constraints; radio propagation; specular paths; spreading; time spread; white Gaussian noise; Bandwidth; Baseband; Fading; Frequency; Interference; Laboratories; Mobile communication; Multipath channels; Time varying systems; Time-varying channels;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1995 IEEE 45th

Conference_Location

Chicago, IL

ISSN

1090-3038

Print_ISBN

0-7803-2742-X

Type

conf

DOI

10.1109/VETEC.1995.504817

Filename

504817