RFMW Design
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GPS
Global Positioning System (GPS) is a satellite-based navigation system made up of a network of 24 satellites placed into orbit by the U.S. Department of Defense. GPS was originally intended for military applications, but in the 1980s, the government made the system available for civilian use. GPS works in any weather conditions, anywhere in the world, 24 hours a day. There are no subscription fees or setup charges to use GPS. GPS satellites transmit two low power radio signals, designated L1 and L2. Civilian GPS uses the L1 frequency of 1575.42 MHz in the UHF band. The signals travel by line of sight, meaning they will pass through clouds, glass and plastic but will not go through most solid objects such as buildings and mountains. The Data transmitted by each satellite, contains important information about the status of the satellite (healthy or unhealthy), current date and time. The Receiver uses the information collected from various satallites for determining a position.
Articles & Tutorials
GPS Guide for Beginners
from Garmin
GPS Basics
Introduction to GPS and its Applications.
GPS Basics
Introduction to GPS
Simplified Explination of GPS
from How Stuff works
GPS
from Wikipedia
GPS Tutorial
from www.trimble.com
RF Receiver Front Ends (GPS)
by Torben Larsen, RF Integrated Systems & Circuits (RISC) group, Aalborg University, Niels Jernes Vej 12— A6–110, Denmark.
A 1.57-GHz RF Front-End forTriple Conversion GPS Receiver
by Francesco Piazza and Qiuting Huang, Senior Member, IEEE