A novel spectrum efficient land mobile radio communication system

Author

Kotzin, Michael D. ; Van den Heuvel, Anthony P. ; Hong, Daehyoung

Author_Institution

Motorola Inc., Arlington Heights, IL, USA

fYear

1991

fDate

19-22 May 1991

Firstpage

98

Lastpage

102

Abstract

An experimental land mobile radio communication system which offers a significant improvement in spectrum efficiency over current analog 25-kHz FM radio is presented. Up to four voice channels are provided on a single 25-kHz spaced radio channel. A novel speech coding/constant envelope modulation technique is utilized along with a TDM/TDMA (time division multiplexing/time division multiple access) radio format. The system exhibits fully encryptable communication quality speech and improved sensitivity (range) while achieving adjacent channel splatter performance which meets the FCC mask for secure voice communications

Keywords

encoding; mobile radio systems; time division multiple access; time division multiplexing; voice communication; TDM/TDMA; adjacent channel splatter performance; land mobile radio communication system; secure voice communications; spectrum efficiency; speech coding/constant envelope modulation; time division multiple access; time division multiplexing; voice channels; Bandwidth; Cryptography; FCC; Information filtering; Information filters; Land mobile radio; Mobile communication; Modulation coding; Space technology; Speech coding;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1991. Gateway to the Future Technology in Motion., 41st IEEE

Conference_Location

St. Louis, MO

ISSN

1090-3038

Print_ISBN

0-87942-582-2

Type

conf

DOI

10.1109/VETEC.1991.140454

Filename

140454