Capacity of advanced TDMA systems for fixed radio access

Author

Burr, A.G. ; Baines, S.J. ; Tozer, T.C.

Author_Institution

Dept. of Electron., York Univ., UK

fYear

1995

fDate

12/1/1995 12:00:00 AM

Firstpage

42614

Lastpage

42619

Abstract

We review the potential of advanced TDMA systems for fixed radio access. We highlight the differences between the fixed radio access (FRA) environment and the cellular mobile environment, and show that there are significant advantages in a system designed specifically for FRA over mobile and personal systems adapted for this purpose. The features of an advanced TDMA system for FRA are discussed, including the use of directional antennas, and adaptive rate coding and modulation. In particular we consider the capacity improvement possible by the use of directional antennas. Even if 99.9% availability is required, a system spectral efficiency of 0.7 bits/s/Hz/cell is possible, a factor of two improvement on a system with isotropic antennas. The advantages of adaptivity are shown by considering a simple adaptive protocol which is able to improve on this figure by a factor of four

Keywords

adaptive codes; cellular radio; channel capacity; directive antennas; modulation; personal communication networks; subscriber loops; time division multiple access; TDMA systems; adaptive modulation; adaptive protocol; adaptive rate coding; availability; cellular mobile radio; directional antennas; fixed radio access; isotropic antennas; personal systems; system capacity; system spectral efficiency;

fLanguage

English

Publisher

iet

Conference_Titel

Local Loop Fixed Radio Access, IEE Colloquium on

Conference_Location

London

Type

conf

DOI

10.1049/ic:19951481

Filename

499585