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Subsampling GNSS Receiver in ASIC


Stanford Reference:

09-046


Abstract


Engineers in Prof. Umran Inan’s laboratory have developed a low-power, low cost, universal GNSS (Global Navigation Satellite System) receiver based on radio frequency (RF) subsampling that can be implemented on a single RF CMOS IC. This receiver has a simple design that includes a low-noise amplifier (LNA), a Q-enhanced bandpass filter, and a 1-bit analog-to-digital converter (ADC). Together, this device can alias RF signals to an IF frequency by sampling the signal at a considerably lower frequency than required by the Nyquist Theorem. Using the receiver, input signals in the range of 1-2 GHz can be down-converted through aliasing with a Noise Figure of less than 7dB. The receiver can be used for all standard GPS, Galileo, and Compass applications.

Applications


  • GNSS receiver - universal design, suitable front-end for all standard GPS, Galileo, Compass applications

Advantages


  • Low power consumption - subsampling process renders Phased-Locked Loop (PLL) and the local oscillator (LO) obsolete
  • Simple, universal design - multiple radio frequencies can be captured and processed at the same time, making this architecture suited for GNSS multi-carrier applications
  • CMOS RF implementation
  • Low noise - noise figure of less than 7dB

Publications



Innovators & Portfolio



Patent Status



Date Released

 9/13/2013
 

Licensing Contact


Anne Kopf-Sill, Licensing Associate
(650)498-8015 (Business)
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Related Keywords


semiconductor: RF   RFIDs   GNSS receiver   RF Signal   GPS / GNSS / Galileo   instrumentation: navigational -- GPS   semiconductor: ASIC and ASSP   GPS   RF components   
 

   

  

Also of Interest...
98-105 Noise-Reducing Partitioning Scheme for Signal Processing Systems
98-179 Method for Reducing Unnecessary Handoffs in Cellular Communication Networks
00-155 Local Oscillator Phase Alignment System for Cartesian Feedback Power Amplifiers

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