FFT based acquisition techniques for satellite based navigation systems
US8384592B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2009 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Apr 11, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/37
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A satellite navigation receiver receives a combination of radio frequency signals from satellites in satellite navigation systems and process the radio frequency signals to calculate an approximate current location of the satellite navigation receiver. Satellite acquisition plays an important part in identifying the current location of the satellite navigation receiver. Acquisition involves identifying the satellites in the satellite navigation that can be used to provide navigation information. Fast Fourier transform based acquisition involves using FFT and subsequently inverse FFT (IFFT) to correlate a coarse acquisition (C/A) code transmitted by a satellite with a C/A code locally generated on the GPS receiver to identify and acquire a transmitting satellite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.