Title :
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
fDate :
12/1/1990 12:00:00 AM
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;
Journal_Title :
Solid-State Circuits, IEEE Journal of
