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GPS Receiver Testing

Application Notes

As GPS technology becomes more common, GPS receiver manufacturers, OEM integrators, and contract manufacturers struggle to determine the appropriate standard tests to verify GPS receiver performance. Verification procedures require a controlled environment that facilitates precise repeatability. In most cases, using actual GPS satellite signals received through an antenna does not provide such an environment. This paper describes the typical GPS receiver tests used today for GPS receiver verification. It also introduces a real-time GPS signal simulation application and platform capable of generating the required GPS signals for a repeatable and flexible test environment. GPS (Global Positioning System) is a satellite-based technology. It allows users to determine positions at points in time by utilizing navigational signals broadcast by multiple satellites, known as a satellite constellation. Currently, this constellation consists of 24 active satellites, which orbit the earth at an altitude of approximately 11,500 miles. Each satellite completes an orbit every 12 hours. The constellation includes some in-orbit spare satellites which can be activated to replace any satellites which may fail.

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