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A fully integrated dual-channel reconfigurable receiver supporting all the GNSS (GPS, Compass, GLONASS, Galileo) signals in 180nm CMOS is presented. The two channels share the frequency synthesizer and RF front-end circuits, but employ separate IF strips to support simultaneous dual-constellation reception. In order to save the power of digital baseband, one of the two IF strips can be configured...
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...
This paper presents a power detection based I/Q imbalance self-calibration technique to compensate signal path gain and phase mismatch in a reconfigurable low-IF receiver. The calibration can be carried out at startup to improve the image rejection ratio (IRR) of the IF complex-bandpass filter, and then configuration words are saved. The system employs an analog I/Q calibration module to adjust signal...
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