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Robust Low-Frequency Spread-Spectrum Navigation System

Oak Ridge National Laboratory

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Publications:

PDF Document Publication11-G00238_ID1614_1627 (2)_1.pdf (566 KB)


Technology Marketing SummaryThe Triply Redundant Integrated Navigation and Asset Visibility System (TRI•NAV) developed by researchers at ORNL expands the ability of GPS navigation systems to reliably function under a variety of adverse conditions, as well as detect multipath, jamming, or spoofing-induced errors. TRI•NAV synergistically combines the use of GPS with a ground-based radio-frequency (RF) scheme known as TPS (the Theater Position System) and a low cost, mid-level performance inertial navigation system (INS) for accurate navigation indoors, underground, and in those circumstances where neither GPS nor TPS signals are available.Description

A major operational liability for deploying U.S. military and law enforcement personnel is the nearly exclusive dependence on conventional GPS for accurate position information in the field. Since GPS signals are comparatively weak and subject to degradation from multipath and RF interference, GPS can be unreliable in adverse reception environments such as thick foliage, rough terrain, and urban areas; it is also susceptible to deception by an adversary. Inertial navigation systems have been proposed as backup systems to GPS reception but they are generally not suitable for field use due to cost, size, and power requirements.

Benefits

By improving radiolocation performance and reliability where GPS reception is impaired or unavailable, TRI•NAV has the potential to become a useful extension to GPS-only navigation. The use of programmable software defined radio-based designs permits the rapid, adaptable returning of hardware to a wide range of operational frequencies to accommodate operational needs. The integration of modern GPS, TPS, and cost-effective INS modules, coupled with a new paradigm in low-power, high-stability timebase technology, can provide the U.S. military, emergency, and law enforcement personnel with a new level of dynamic location system accuracy, reliability, and availability, especially in adverse reception environments.

•Allows for accurate, reliable tracking and navigation in buildings, heavy foliage, urban terrain, caves, and underground with less interference than is currently available using GPS
•Provides additional level of safety for military and law-enforcement personnel, etc.

Applications and Industries

•Military, emergency, and law-enforcement safety applications
•Radio-frequency communications, wireless security, and intermodal logistics
•Mining, tourism, security, safety

More InformationStephen F. Smith and James A. Moore. Robust Low-Frequency Spread-Spectrum Navigation System, U.S. Patent No. US 7,876, 267B2, issued January 25, 2011.

Stephen F. Smith and James A. Moore. Robust Low-Frequency Spread-Spectrum Navigation System, U.S. Patent No. US 7,859, 464B2, issued December 28, 2010.

Stephen F. Smith and James A. Moore. Robust Low-Frequency Spread-Spectrum Navigation System, U.S. Patent No. US 7,626, 544B2, issued December 1, 2009.

Stephen F. Smith and James A. Moore. Triply Redundant Integrated Navigation and Asset Visibility System, U.S. Application No. 11/583,373, filed October 17, 2006.
Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Date
Patent 7,626,544
Patent
7,626,544
Robust low-frequency spread-spectrum navigation system
Methods and apparatus are described for a navigation system. A process includes providing a plurality of transmitters distributed throughout a desired coverage area; locking the plurality of transmitters to a common timing reference; transmitting a signal from each of the plurality of transmitters. An apparatus includes a plurality of transmitters distributed throughout a desired coverage area; wherein each of the plurality of transmitters comprises a packet generator; and wherein the plurality of transmitters are locked to a common timing reference.
Oak Ridge National Laboratory 12/01/2009
Issued
Patent 7,876,267
Patent
7,876,267
Robust low-frequency spread-spectrum navigation system
Methods and apparatus are described for a navigation system. A process includes providing a plurality of transmitters distributed throughout a desired coverage area; locking the plurality of transmitters to a common timing reference; transmitting a signal from each of the plurality of transmitters. An apparatus includes a plurality of transmitters distributed throughout a desired coverage area; wherein each of the plurality of transmitters comprises a packet generator; and wherein the plurality of transmitters are locked to a common timing reference.
Oak Ridge National Laboratory 01/25/2011
Issued
Patent 7,859,464
Patent
7,859,464
Robust low-frequency spread-spectrum navigation system
Methods and apparatus are described for a navigation system. A process includes providing a plurality of transmitters distributed throughout a desired coverage area; locking the plurality of transmitters to a common timing reference; transmitting a signal from each of the plurality of transmitters. An apparatus includes a plurality of transmitters distributed throughout a desired coverage area; wherein each of the plurality of transmitters comprises a packet generator; and wherein the plurality of transmitters are locked to a common timing reference.
Oak Ridge National Laboratory 12/28/2010
Issued
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
UT-B IDs 200501614, 200501627PrototypeAvailable11/21/201110/25/2011

Contact ORNL About This Technology

To: Eugene Cochran<cochraner@ornl.gov>