Now showing items 1-10 of 11
On the Feasibility of cm-Accurate Positioning via a Smartphone’s Antenna and GNSS Chip
The feasibility of centimeter-accurate carrier-phase differential GNSS (CDGNSS) positioning using a smartphone’s internal GNSS antenna and GNSS chip is investigated. Precise positioning on a mass-market platform would ...
Low-Cost Precise Urban Positioning
Precise Augmented Reality Enabled by Carrier-Phase Differential GPS
A prototype precise augmented reality (PAR) system that uses carrier phase differential GPS (CDGPS) and an inertial measurement unit (IMU) to obtain sub-centimeter level accurate positioning and degree level accurate ...
Opportunistic Frequency Stability Transfer for Extending the Coherence Time of GNSS Receiver Clocks
A framework is presented for exploiting the frequency stability of non-GNSS signals to extend the coherence time of inexpensive GNSS receiver clocks. This is accomplished by leveraging stable ambient radio frequency ...
Precision Limits of Low-Energy GNSS Receivers
Limitations on position-time precision are analyzed in energy-constrained GNSS receivers. The goal of this work is to determine the combination of sampling rate, number of quantization bits, number of satellites tracked, ...
Constructing a Continuous Phase Time History from TDMA Signals for Opportunistic Navigation
A technique is developed for reconstructing a continuous phase time history from the noncontinuous phase bursts of time division multiple access (TDMA) signals. A continuous phase time history facilitates exploitation ...
Centimeter Positioning with a Smartphone-Quality GNSS Antenna
This paper demonstrates for the first time that centimeteraccurate positioning is possible based on data sampled from a smartphone-quality Global Navigation Satellite System (GNSS) antenna. Centimeter-accurate ...