Title :
Transmitter architecture using digital generation of RF signals
Author :
Rode, J. ; Hinrichs, J. ; Asbeck, P.
Author_Institution :
California Univ., San Diego, CA, USA
Abstract :
This paper describes architecture for a CDMA RF transmitter implemented in digital CMOS. The functions of up-conversion and filtering are carried out in the digital domain. A band-pass delta-sigma modulator is used to produce a one-bit output containing the desired analog signal, which is then fed to switching-mode power amplifier. Issues for the digital logic implementation to facilitate proper modulator operation at the required high clock rates (>3.3 GHz) are discussed in detail.
Keywords :
CMOS logic circuits; code division multiple access; delta-sigma modulation; digital radio; digital signal processing chips; power amplifiers; radio transmitters; CDMA RF transmitter; RF signals; band-pass delta-sigma modulator; code division multiple access; digital CMOS; digital generation; digital logic implementation; filtering; switching-mode power amplifier; transmitter architecture; up-conversion; Band pass filters; Delta modulation; Digital filters; Filtering; Multiaccess communication; Power amplifiers; Radio frequency; Radiofrequency amplifiers; Signal generators; Transmitters;
Conference_Titel :
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings
Print_ISBN :
0-7803-7829-6
DOI :
10.1109/RAWCON.2003.1227938
