Processing of satellite navigation system signals and related receive-signal verification
USRE46879E1 · kind E1 · reissue
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2015 |
| Grant date | May 29, 2018 |
| Priority date | — |
| Expiry date | Jun 24, 2035 |
Classification
- Technology area (CPC —)General
Abstract
A system implements a location based service, and comprises a satellite navigation receiver implementing a position tracking function for providing the location of a user of the service. An analogue RF receiver receives satellite signals and performs at least a frequency downconversion. Correlation and decoding functions are applied to the downconverted signals for deriving location information from detected specific satellite signals. The system further comprises a server for receiving samples of the downconverted signals, and for verifying the samples are consistent with the expected satellite signals at that time and location. The invention provides a counter measure for detecting the counterfeiting of, or tampering with, the satellite signals at the receiver. A check can be made that the received satellite signals correspond to those which are expected at that location and time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.