Inside GNSS: Engineering Solutions from the Global Navigation Satellite System Community
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Thought Leadership Series
Working Papers • March 2006

Platforms for a Future GNSS Receiver

GNSS receiver technology has changed dramatically since the first reception of a GPS signal. It evolved from complex electrical circuits — partly analog — tracking only one satellite at a time to today’s sophisticated, small multichannel receivers. The core of a modern receiver is contained in one or more highly sophisticated chips that perform all the receiver’s tasks, starting with signal processing, followed by positioning, and often ending at application processing.

November 16, 2007

Garmin Withdraws Tele Atlas Bid, Extends Navteq Agreement

Thwarted in its latter-day attempt to buy digital mapmaker Tele Atlas out from under TomTom, GPS manufacturer Garmin International has signed an long-term deal with rival map provider Navteq.

Under the agreement announced today (November 16) Garmin will extend its current six-year agreement with Chicago, Illinois–based NAVTEQ to access to map data through 2015 with an option to continue through 2019.

November 13, 2007

FREE build-it-yourself model GPS IIR-M from Baseband Technologies

The holidays are coming – what can you find for the engineer who has everything? Why not build your own museum-quality paper GPS satellite model at home?

You can do it with a free-downloadable kit, courtesy of Baseband Technologies, Canadian designers of GNSS OEM receivers. All you need are the supplies in the average third-grader’s school desk and two or three hours of free time. The finished product will fit nicely on a corner of your desk.

November 13, 2007

GPS Market Studies Focus on High-Volume Devices

Three new market studies — from Berg Insight, ABI Research, and Markets and Research — focus on GPS chipsets and the high-volume consumer device markets that drive them, all predicting continued rapid growth.

Inside GNSS • Fall 2007

Fuzzy Time

Synchronization serves as a pacemaker for current and next-generation digital telecommunications networks, particularly cellular networks such as the CDMA2000 1xEV-DO system.

These networks with their large coverage areas, increased complexity, and high data rates call for precise and accurate time alignment of operations. For instance, according to IS-95/IS-2000 standard established by the Third Generation Partner Project 2 Technical Specification Group, CDMA network operators expect an accuracy of three microseconds per day from synchronization sources.

Inside GNSS • Fall 2007

Lightening the Data Processing Load

The last two decades have seen the evolution of increasingly sophisticated GNSS signal processing technology. These advances include such things as improved methods for acquiring and tracking a wide variety of new signal structures, advanced multipath mitigation techniques, the development of high-sensitivity receivers for reliable operation indoors and in urban canyons, high-speed processing to reduce time to first fix, and algorithms for improved ranging accuracy and attitude estimation.

Inside GNSS • Fall 2007

GPS/GPRS on the Road

GPS was introduced to much of the consumer market during the 1990s in the form of car navigation systems. This was the era of standalone navigation solutions.

Today, network-based navigation systems are common and, in the context of commercial vehicle tracking, usually required. One application in this field is fleet management for taxi companies. A human operator at the service center coordinates the pickup of the next customer by the closest vehicle.

Inside GNSS • Fall 2007

Reign of Point Clouds

Commercially available airborne LIDAR (LIght Detection And Ranging) systems have been deployed for more than a decade, and the technology has been widely accepted as a fast and efficient means of capturing topographic information.

The accuracy of a final 3D LIDAR “point cloud” is directly affected by the accuracy of the underlying positioning technology — typically a GPS/inertial navigation system — used to georeference the LIDAR measurements.

October 26, 2007

U.S. Department of Commerce Proposes Update to Office Overseeing GPS and Related PNT Activities

The Department of Commerce has proposed legislation to boost the U.S. government’s space commerce activities. Specifically, the bill would reauthorize the Office of Space Commercialization (OSC), restore the office's original name — Office of Space Commerce — and focus the office’s responsibilities to enable a robust and responsive U.S. commercial space industry.

Human Engineering • March 2006

Michael Braasch: Dr. Braasch’s Opus

Much like the lead character in “Mr. Holland’s Opus,” a 1995 movie about another talented teacher, Mike Braasch found out that life happens while you’re busy making other plans. Braasch, now the Thomas Professor of Electrical Engineering at Ohio University’s Russ College of Engineering and technology, was unaware of how fast and hard he would fall for the three compass points of his subsequent life: Soo, the electrical engineering classmate who married him; the global navigation satellite system community; and his students.

Jammer Dectector
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