Global position system receiver
US4807256A · kind A · utility
96Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1985 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Dec 23, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A Global Position System (GPS) receiver is disclosed which includes an RF converter and quadrature digitizer implemented in hardware and a signal processor including a computer, code generator and preprocessor. The preprocessor has a divide by 1,2,3 divider for controlling the code generator so as to provide I,Q early, prompt and late digital signals of 0.5 chip separations to the computer for tracking code phase, carrier phase/frequency and signal amplitude. This structure eliminates the need for numerically controlled oscillators implemented in hardware while maintaining accurate performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.