A 270-kb/s 35-mW modulator IC for GSM cellular radio hand-held terminals

Author

Haspeslagh, Johan J J ; Sallaerts, Danny ; Reusens, Peter P. ; Vanwelsenaers, Arnoul ; Granek, R. ; Rabaey, Dirk

Author_Institution

Alcatel Bell Telephone, Antwerpen, Belgium

Volume

25

Issue

6

fYear

1990

fDate

12/1/1990 12:00:00 AM

Firstpage

1450

Lastpage

1457

Abstract

The modulator IC is a mixed analog/digital transceiver component in a chip set that is designed for the hand-held terminals of the pan-European 900-MHz Groupe Special Mobile (GSM) digital cellular radio network. The concept of the radio-frequency environment in which the circuit is used is explained, focusing on the differences in existing systems. The architecture and different functions of the modulator circuit and details of the digital and analog processing in the transmission mode are discussed. The receiving mode, which is mostly based on analog processing, is highlighted. The device generates Gaussian minimum-shift-keying (GMSK) modulation and converts the received signal to 8-b words after filtering. The modulator IC uses digital waveform generation and a quadrature signal representation. This device is implemented in a 1.5-μm CMOS technology. The power consumption is less than 35 mW from a 5-V supply

Keywords

CMOS integrated circuits; cellular radio; digital radio systems; minimum shift keying; modulators; 1.5 micron; 270 kbit/s; 35 mW; 900 MHz; CMOS technology; GSM cellular radio hand-held terminals; Gaussian minimum-shift-keying; Groupe Special Mobile; digital cellular radio network; digital waveform generation; mixed analog/digital transceiver component; modulator IC; power consumption; quadrature signal representation; radio-frequency environment; receiving mode; transmission mode; Analog integrated circuits; CMOS technology; Digital integrated circuits; Digital modulation; Filtering; GSM; Land mobile radio cellular systems; Radio frequency; Signal generators; Transceivers;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.62173

Filename

62173