| Urban/Indoor Navigation Using Network Assisted GPS |
JUN 2006 |
7 pages |
| Authors:
Alison K. Brown; Paul Olson; NAVSYS CORP COLORADO SPRINGS CO
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 | GPS information is an essential element of network centric warfare providing key positioning and timing information in support of communication, positioning and navigation functions. For these networked GPS applications, it is also possible to improve the ability of GPS to operate in challenged environments, such as inside buildings, by using GPS Network Assistance. This paper describes the Network Assisted (NETASSIST) system architecture and a Software GPS Receiver (SGR) Test Bed ... |
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| Design and Test Results of a Software Defined Radio for Indoor Navigation |
2006 |
7 pages |
| Authors:
Alison K. Brown; Yan Lu; Janet Nordlie; NAVSYS CORP COLORADO SPRINGS CO
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| NAVSYS has developed a Software Defined Radio (SDR) test-bed with the capability of navigating inside of buildings. This test-bed combines Global Positioning System (GPS), wireless communications, and Time-of- Arrival (TOA) Pseudolite technology to provide location indoors for applications such as first responders, warfighters, and location-based services. The system uses network assistance over a wireless 802.11 link to enhance GPS and TOA in low-signal and degraded-signal environments (e.g. tunnels, buildings, under ... |
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| Remote Sensing using Bistatic GPS and a Digital Beam-Steering Receiver |
25 JUL 2005 |
5 pages |
| Authors:
Alison K. Brown; NAVSYS CORP COLORADO SPRINGS CO
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| GPS bistatic signals have applications for remote sensing in collecting data such as soil moisture content, surface altitude or wave speed. Prior research using these signals has been limited by the low signal power of the bistatic GPS signals. NAVSYS Corporation has developed an advanced bistatic GPS receiver that uses a 109-element GPS antenna array and digital beam steering to provide gain to increase the ability to detect the weak ... |
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| A Hybrid Integrity Solution for Precision Landing and Guidance |
APR 2004 |
11 pages |
| Authors:
Kenn L. Gold; Alison K. Brown; NAVSYS CORP COLORADO SPRINGS CO
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| NAVSYS Corporation has designed a hybrid integrity monitoring solution for precision approach and landing in a GPS environment degraded by RF interference. The integrity solution described in this paper leverages the capabilities of next generation digital spatial processing and ultra-tightly-coupled (UTC) GPS/inertial integrated military User Equipment (UE). The design includes a spatial environment integrity monitor, a GPS/inertial RAIM solution that allows detection of small error drift rates before the blended ... |
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