Pub. Date:
Artech House, Incorporated
A-GPS: Assisted GPS, GNSS, and SBAS

A-GPS: Assisted GPS, GNSS, and SBAS

by Frank van Diggelen


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Today, increasing demands and expectations are being placed on GPS systems. Assisted GPS (A-GPS) has been developed to provide greatly improved capabilities, helping GPS work better and faster in almost any location. Offering a detailed look at all the technical aspects and underpinnings of A-GPS, this unique book places emphasis on practical implementation. The book reviews standard GPS design, helping you understand why GPS requires assistance in the first place. You discover how A-GPS enables the computing of a position from navigation satellites in the absence of precise time - a topic not covered in any other book. Moreover, you learn how to design and analyze a high sensitivity GPS receiver and determine the achievable sensitivity of a GPS receiver. The book provides detailed worksheets that show how to compute, analyze, and improve the processing gain from the signal strength at the antenna to the carrier-to-noise ratio (C/N0) at the front end, to the signal-to-noise ratio (SNR) after the correlators. This cutting-edge volume discusses special forms of assistance data, industry standards for A-GPS, and government mandates for location of mobile phones. You also find coverage of future global navigation satellite systems and how they can be designed specifically for instant-fixes and high sensitivity. The book features numerous tables, worksheets, and graphs that illustrate key topics and provide the equivalent of a technical handbook for engineers who design or use A-GPS.

Product Details

ISBN-13: 9781596933743
Publisher: Artech House, Incorporated
Publication date: 03/28/2009
Pages: 381
Sales rank: 926,035
Product dimensions: 7.20(w) x 10.10(h) x 1.00(d)

About the Author

Frank van Diggelen is the technical director, GPS systems and the chief navigation officer at Broadcom Corporation. Dr. van Diggelen is also a technical advisor of assisted GPS for NavtechGPS. He holds a Ph.D. in electrical engineering from Cambridge University, England.

Table of Contents

Introduction. Standard GPS Review. Assistance - the "A" in A-GPS. Coarse Time Navigation - "Instant GPS". Coarse Time HDOP. High Sensitivity - "Indoor GPS". Generating Assistance Data. Long Term Orbits. Industry Standards and Government Mandates. Past and Future A-GNSS.

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