Title :
A dual-mode zero-IF receiver for dual-band CDMA cellular and GPS
Author :
Charlon, O. ; Clamagirand, S. ; Vathulya, V. ; Hritz, C. ; Fahs, B. ; Burg, O. ; Caumont, C. ; Barre, P. ; Guiraud, L. ; Chartier, E. ; Blanchard, V. ; Waite, H. ; Redman-White, W. ; Perkins, R. ; Brunel, D. ; Soudee, E.
Author_Institution :
NXP Semicond., San Jose
Abstract :
We present a dual-mode receiver for dual-band CDMA 2000 cellular radio, which incorporates an integrated GPS signal path for "E911" emergency call location requirements. The highly integrated zero-IF architecture has separate optimised front-ends, but employs a single shared, reconfigurable baseband path for the two signal bandwidths. The CDMA LO signals are derived from a single external VCO that operates at either twice or 8/9 times the LO frequency at 880 MHz and 1960 MHz respectively, thereby reducing coupling with the transmit path. The circuit is implemented in a 0.25 mum 40 GHz fT BiCMOS process. The chip area is 5 mm2; the CDMA CEL/PCS and GPS receivers consume 108/131 mW and 157 mW respectively, using a 2.7 V supply.
Keywords :
3G mobile communication; BiCMOS integrated circuits; Global Positioning System; cellular radio; radio receivers; voltage-controlled oscillators; BiCMOS process; CDMA 2000; GPS receivers; dual-band cellular radio; dual-mode receiver; emergency call location; frequency 1960 MHz; frequency 880 MHz; integrated GPS signal path; reconfigurable baseband path; single external VCO; size 0.25 mum; voltage 2.7 V; zero-intermediate frequency receiver; Bandwidth; Baseband; Coupling circuits; Dual band; Frequency; Global Positioning System; Land mobile radio cellular systems; Multiaccess communication; Receivers; Voltage-controlled oscillators;
Conference_Titel :
Solid State Circuits Conference, 2007. ESSCIRC 2007. 33rd European
Conference_Location :
Munich
Print_ISBN :
978-1-4244-1125-2
DOI :
10.1109/ESSCIRC.2007.4430335