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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. The book provides detailed worksheets that show how to compute, analyze, and improve the processing gain from the input signal at the antenna to the signal after the correlators. These worksheets are used in the book to generate families of curves that completely characterize receiver sensitivity, parameterized in terms of front end noise figure, coherent and noncoherent integration times. From this work a law of achievable sensitivity is derived and explained in the book.When the signal reaches the GPS receiver on the Earth, the received signal power is about 100 attowatts; aquot;attoaquot; ... signal problems; the weak signal is a problem outdoors, too, and standard GPS receivers have trouble acquiring satellites withanbsp;...

Author:Frank Stephen Tromp Van Diggelen
Publisher:Artech House - 2009-01-01


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