GPS Receiver
US6778135B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2002 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Nov 18, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/70715
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The global positioning system (GPS) receiver of the present invention operates to search a range of frequencies by correlating a baseband signal corresponding to a received GPS signal with a generated frequency and a generated code at a plurality of time offsets. Address translation logic operates to group results of the correlation according to the plurality of time offsets by translating addresses received from a direct memory access (DMA) controller in order to improve the efficiency of performing a fast Fourier transform (FFT) on the results of the correlation. The transformed data produced by the FFT process are used by the GPS receiver to determine a frequency of the received GPS signal and a time offset associated with a ranging code carried in the received GPS signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.