NDLI: A Phase-Reconstruction Technique for Low-Power Centimeter-Accurate Mobile Positioning

Content Provider	IEEE Xplore Digital Library
Author	Pesyna, K.M. Kassas, Z.M. Heath, R.W. Humphreys, T.E.
Copyright Year	1991
Abstract	A carrier phase reconstruction technique is presented as an enabler for low-power centimeter-accurate mobile positioning. Reliable carrier phase reconstruction permits the duty cycling of a Global Navigation Satellite System (GNSS) receiver whose outputs are used for precise carrier-phase differential GNSS (CDGNSS) positioning. Existing CDGNSS techniques are power intensive because they require continuous tracking of each GNSS signal's carrier phase. By contrast, the less-precise code-ranging technique that is commonly used in mobile devices for 3-to-10-meter-accurate positioning allows for aggressive measurement duty-cycling, which enables low-power implementations. The technique proposed in this paper relaxes the CDGNSS continuous phase tracking requirement by solving a mixed real and integer estimation problem to reconstruct a continuous carrier phase time history from intermittent phase measurement intervals each having an ambiguous initial phase. Theoretical bounds on the probability of successful phase reconstruction, corroborated by Monte-Carlo-type simulation, are used to investigate the sensitivity of the proposed technique to various system parameters, including the time period between successive phase measurement intervals, the duration of each interval, the carrier-to-noise ratio, and the line-of-sight acceleration uncertainty. A demonstration on real data indicates that coupling a GNSS receiver with a consumer-grade inertial measurement unit enables reliable phase reconstruction with phase measurement duty cycles as low as 5%.
Sponsorship	IEEE Signal Processing Society
Starting Page	2595
Ending Page	2610
Page Count	16
File Size	2420875
File Format	PDF
ISSN	1053587X
Volume Number	62
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Receivers Phase measurement Global Positioning System Clocks Reliability Position measurement History satellite navigation Carrier phase differential GNSS (CDGNSS) Global Positioning System (GPS) inertial measurement unit (IMU) integer ambiguity resolution Kalman filtering low-power positioning precise positioning real time kinematic (RTK)
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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