Design concept of TDMA cellular mobile radio units

Author

Shimizu, Isao ; Chiba, Kohji ; Takami, Tadao ; Tanda, Takesi ; Murota, Kazuaki

Author_Institution

NTT Radio Commun. Syst. Lab., Kanagawa, Japan

fYear

1992

fDate

10-13 May 1992

Firstpage

570

Abstract

A digital mobile communication system that allows more cellular subscribers as well as achieving upgraded service has been developed. The design concept and performance of car-mounted, portable, and handheld cellular telephones for the digital mobile communication system is presented. Major system parameters standardized by RCR, which are mandatory in the Japanese digital cellular system, and the mobile radio unit configuration based on the specification are introduced. Novel technologies for achieving highly precise and efficient π/4-shifted QPSK transmission in digital mobile radio units are shown, and excellent performance is demonstrated. Furthermore, based on these technologies, a design method to achieve low power consumption and small-sized handheld telephone is shown

Keywords

cellular radio; cordless telephone systems; phase shift keying; radio equipment; telephone sets; time division multiple access; π/4-shifted QPSK transmission; Japanese digital cellular system; Japanese standard; RCR; TDMA cellular mobile radio units; car mounted telephones; handheld cellular telephones; portable telephones; power consumption; radio unit configuration; specification; system parameters; Commercialization; Demodulation; Digital modulation; Land mobile radio; Mobile communication; Quadrature phase shift keying; Radio frequency; Radiofrequency amplifiers; Telephony; Time division multiple access;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1992, IEEE 42nd

Conference_Location

Denver, CO

ISSN

1090-3038

Print_ISBN

0-7803-0673-2

Type

conf

DOI

10.1109/VETEC.1992.245330

Filename

245330