Signal receiver for global positioning system
US5402441A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 17, 1993 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Aug 17, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A GPS signal receiver has a PN code generator for producing a PN code identical to a PN code in a received GPS signal which is transmitted from a GPS satellite, the PN code produced by the PN code generator being controllable in phase, a PN code correlator for correlating the received GPS signal with the PN code produced by the PN code generator so as to code-strip the received GPS signal, a signal search unit for monitoring a correlated output signal from the PN code correlator and controlling the phase of the PN code produced by the PN code generator to search for a correlated output signal in excess of a predetermined value, a signal determining unit for determining the correlated output signal in excess of the predetermined value as being produced by a direct wave of the GPS signal, and a signal tracking unit for controlling the phase of the PN code produced by the PN code generator to track a peak of the correlated output signal that is determined as being produced by the direct wave of the GPS signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.