Global positioning system (GPS) assembly test using wireless transmission
US7889123B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 28, 2008 |
| Grant date | Feb 15, 2011 |
| Priority date | — |
| Expiry date | Jul 8, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/23
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A GPS assembly test system and method for a wireless communications device, such as a mobile telephone, having an integrated GPS receiver. The GPS assembly test can be performed without the requirement of external testing equipment. The GPS assembly test activates the wireless communications device transmitter during testing to increase GPS in-band noise. If the GPS receiver components are installed and operating properly, a change in noise is expected and can be detected. Embodiments include test software to initiate the transmitter during testing. Different methods can be used to detect a change in noise density. For example, an expected automatic reduction in gain control to a low noise amplifier (LNA) can be detected when the transmitter is activated. Another example includes setting LNA gain to a fixed gain and detecting expected changes in data generated an analog-to-digital (A/D) converter in response to the increased noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.