CPS transform correlation receiver and method
US4998111A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1989 |
| Grant date | Mar 5, 1991 |
| Priority date | — |
| Expiry date | Nov 27, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for rapid acquisition of multiple GPS signals builds upon fast Fourier transformation of input GPS signals to simultaneously track multiple satellites and derive psuedorange measurements that are suitable for navigation solution. The method utilizes 2M samples of the reference signal with N samples of the signal set from the satellites (one millisecond of actual data) to directly compute the fractional psuedorange values for four (4) or more satellites. The FFT process is incorporated with a process to determine an integer psuedorange. The integer psuedorange is then combined with a fractional psuedorange to define the GPS navigation solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.