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With the huge growth in usage of Location Based Services (LBS) and the need to meet E911 requirements, the number of mobile cellular devices supporting Assisted GPS (A-GPS) is steadily on the rise. As one of the enabling LBS technologies, A-GPS offers its customers higher position accuracy, quicker location fixes, and improved coverage of service in difficult locations, such as urban and in-building environments. As a result, mobile operators and device manufactures are looking for testing choices that quantify and benchmark real-world device performance. Until recently, all industry-defined A-GPS test methodologies focused on testing the performance of a device over a cabled RF connection, bypassing the GPS antenna and associated circuitry.
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