An AC-coupled direct-conversion receiver for Global Positioning System

Author

Hsu, Shaomin ; Namgoong, Won

Author_Institution

Dept. of Electr. Eng., Univ. of Southern California, Los Angeles, CA, USA

fYear

2005

fDate

23-26 May 2005

Firstpage

3235

Abstract

An AC-coupled direct-conversion receiver (DCR) has been designed for GPS. To overcome the effects of dc-offset noise, the receiver employs a first-order high pass filter (HPF) with a corner frequency of 60kHz. The distortion caused by the HPF can be effectively compensated by appropriately processing in the digital back-end. The digital compensation approach has been verified with experimental data. The mixer and the baseband stages of the GPS receiver have been fabricated in a 0.35μm CMOS process. The power consumption is 10mW drawing from a 2.5V power supply.

Keywords

CMOS integrated circuits; Global Positioning System; compensation; distortion; high-pass filters; mixers (circuits); radio receivers; 0.35 micron; 10 mW; 2.5 V; 60 kHz; AC-coupled direct-conversion receiver; CMOS process; GPS; Global Positioning System; HPF; baseband; dc-offset noise; digital back-end; distortion compensation; first-order high pass filter; mixer; Baseband; CMOS process; Cutoff frequency; Distortion; Energy consumption; Filters; Global Positioning System; Intersymbol interference; Performance loss; Semiconductor device noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on

Print_ISBN

0-7803-8834-8

Type

conf

DOI

10.1109/ISCAS.2005.1465317

Filename

1465317