An experimental TDMA indoor radio communications system using slow frequency hopping and coding

Author

Saleh, Adel A M ; Rustako, A.J., Jr. ; Cimini, Leonard J., Jr. ; Owens, G.J. ; Roman, R.S.

Author_Institution

AT&T Bell Labs., Holmdel, NJ, USA

Volume

39

Issue

1

fYear

1991

fDate

1/1/1991 12:00:00 AM

Firstpage

152

Lastpage

162

Abstract

The general principles, implementation, and performance of a 1-Mb/s time-division-multiple-access (TDMA), slow frequency hopping and coding, 1.5-GHz radio communications system for a medium-sized office building are discussed. TDMA is provided for service flexibility and slow frequency hopping and coding for immunity against multipath fading and interference. Measurements show that, with a hallway-mounted distributed antenna system installed on one floor of the building and with the mobile unit transmitting only 1 mW of peak RF power from anywhere on that floor, only a single 384-b frame out of a total of 200000 transmitted frames suffered an unrecoverable error. This kind of performance is comparable to that of wired data modems. Similar performance was obtained from a central antenna covering the same floor. However, the required transmitted power in this case was 100 mW. Implementation issues, such as spectrum allocation, cellular subdivisions, and spectrum efficiency, are also discussed

Keywords

cellular radio; error correction codes; frequency agility; interference suppression; time division multiple access; 1 Mbit/s; 1.5 GHz; Reed-Solomon code; TDMA indoor radio communications system; UHF; burst-error correcting block code; cellular subdivisions; coding; flexibility; hallway-mounted distributed antenna system; implementation; interference immunity; multipath fading immunity; performance; slow frequency hopping; spectrum allocation; spectrum efficiency; Antenna measurements; Fading; Floors; Indoor radio communication; Interference; Mobile antennas; Power measurement; Radio communication; Spread spectrum communication; Time division multiple access;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.68286

Filename

68286