Patent
Navigation receiver with coupled signal-tracking channels
James W. Sennott,David Senffner +1 more
TLDR
In this paper, the authors proposed a coupled-tracking navigation receiver that periodically measures carrier phase, carrier frequency, modulation phase, and carrier amplitude for all of the signals arriving at the receiving ports of the receiver and periodically estimates the present values of carrier phase and frequency, and modulation phase for all received signals, the estimating process utilizing for each parameter estimate the parameter measurements for a plurality of the received signals properly combined in a statistically appropriate manner.Citations
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Book
Principles of GNSS, Inertial, and Multi-Sensor Integrated Navigation Systems
TL;DR: In this paper, the authors present a single-source reference for navigation systems engineering, providing both an introduction to overall systems operation and an in-depth treatment of architecture, design, and component integration.
Patent
Platform and applications for wireless location and other complex services
TL;DR: In this paper, a network services architecture is disclosed that allows complex services, such as wireless location services, to be more easily integrated into a telecommunications network, in particular, location-based services utilizing a wireless location gateway.
Patent
Wireless location using signal fingerprinting
Charles L. Karr,Dennis J. Dupray +1 more
TL;DR: In this article, a location system for commercial wireless telecommunication infrastructures is described, which is an end-to-end solution having one or more location centers for outputting requested locations of commercially available handsets or mobile stations (MS) based on, e.g., CDMA, AMPS, NAMPS or TDMA communication standards.
Patent
Multi-mode global positioning system for use with wireless networks
TL;DR: In this paper, a GPS system that can operate in different modes depending on the network facilities and bandwidth available, the GPS information that can be acquired, or user or system requirements.
Patent
Information transfer in a multi-mode global positioning system used with wireless networks
TL;DR: In this paper, a GPS system that can operate in different modes depending on the network facilities and bandwidth available, the GPS information that can be acquired, or user or system requirements is presented.
References
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Patent
Navigation system and method
Ralph E. Taylor,James W. Sennott +1 more
TL;DR: In this paper, an acquisition-aiding signal generated by an earth-based control station (12) is relayed to user terminals via a geostationary satellite (10) to simplify user equipment.
Patent
Digital global positioning system receiver
Robert V. Janc,Steven C. Jasper +1 more
TL;DR: In this article, a digital receiver for GPS C/A-code signals is described, which provides reception and tracking a plurality of satellites simultaneously, using four separate receiver channels, and includes an analog front-end for selecting and frequency translating the received GPS signal.
Patent
GPS system and method for deriving pointing or attitude from a single GPS receiver
TL;DR: In this paper, a single-receiver pointing/attitude system using a single GPS receiver with multiple GPS antennas (a reference antenna and at least two slave antennas for pointing or three for attitude) is described.
Patent
High dynamic global positioning system receiver
TL;DR: In this article, a GPS receiver having a number of channels, one for each of a plurality of satellites, receives an aggregate of pseudorange code time division modulated signals from some or all satellites and converts the aggregate to baseband and then to digital form for separate processing in the separate channels, each of which includes a complex mixer for adjustment of the baseband signal to a smooth estimate of frequency, ω, for the next measurement interval, and an N-lag cross correlator which receives a replica of the pseudorange (delay), τ, adjusted for a smoothed estimate
Patent
Global positioning system course acquisition code receiver
TL;DR: In this article, a GPS satellite receiver is disclosed in which the frequency of the received satellite signal is down converted in a single step by a balanced mixer driven by a half-frequency local oscillator.