Title :
A 180nm fully-integrated dual-channel reconfigurable receiver for GNSS interoperations
Author :
Nan Qi ; Baoyong Chi ; Yang Xu ; Zhou Chen ; Jun Xie ; Zheng Song ; Zhihua Wang ; Chan, H.
Author_Institution :
Inst. of Microelectron., Tsinghua Univ., Beijing, China
Abstract :
A fully-integrated dual-channel reconfigurable GNSS (GPS/GLONASS/Galileo/Compass) receiver in 180nm CMOS is presented, supporting simultaneous dual-system signal reception. Two channels of the receiver share RF front-end circuits and the frequency synthesizer, and employ separate IF-strips to support the different navigation systems. Reconfigurable signal bandwidths are supported, covering from 2.2MHz to 10MHz to implement both civil and high precision positioning. The on-chip I/Q mismatch calibration circuit is integrated to improve the image rejection ratio (IRR), which can be realized automatically with the aid of a FPGA. Besides, the receiver integrates internal AFC, DCOC, LDO and DCXO, which make it a complete GNSS radio. Thanks to the power scalable analog baseband circuits, the power consumption in the typical dual-channel mode is reduced to 23mA. The receiver achieves 2.5dB noise figure, 55dB dynamic range with 1dB steps, 50dB IRR and -57dBm input 1dB-compression point. The receiver can cooperate with a digital baseband to track real-time satellites in the open sky, achieving higher than 40dB CNR for both GPS and Compass systems.
Keywords :
CMOS integrated circuits; Global Positioning System; field programmable gate arrays; frequency synthesizers; power consumption; radio receivers; radio reception; radiofrequency integrated circuits; satellite tracking; wireless channels; AFC; CMOS; Compass systems; DCOC; DCXO; FPGA; GLONASS; GNSS interoperations; GNSS radio; GPS; Galileo; IF-strips; IRR; LDO; RF front-end circuits; bandwidth 2.2 MHz to 10 MHz; current 23 mA; digital baseband; dual-channel mode; dual-system signal reception; frequency synthesizer; fully-integrated dual-channel reconfigurable GNSS; fully-integrated dual-channel reconfigurable receiver; high precision positioning; image rejection ratio; navigation systems; noise figure 2.5 dB; on-chip I/Q mismatch calibration circuit; power consumption; power scalable analog baseband circuits; real-time satellite tracking; receiver channel; reconfigurable signal bandwidths; size 180 nm; Baseband; Calibration; Compass; Global Navigation Satellite Systems; Global Positioning System; Radio frequency; Receivers;
Conference_Titel :
ESSCIRC (ESSCIRC), 2013 Proceedings of the
Conference_Location :
Bucharest
Print_ISBN :
978-1-4799-0643-7
DOI :
10.1109/ESSCIRC.2013.6649101
