Method and apparatus for correlating a satellite signal with a reference code
US6795771B2 · kind B2 · utility
20Cited by
43References
21Claims
0Family size
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Key dates
| Filing date | Sep 29, 2003 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Sep 29, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2205/002
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for correlating a satellite signal with a reference code is described. In an example, samples of a satellite signal having a repeating code are received. At least one fast convolution between the samples and the pseudorandom reference code is performed. A correlation peak is detected within a result of the at least one fast convolution. A code phase of the repeating code relative to the pseudorandom reference code is estimated at the correlation peak. The samples are then correlated with the pseudorandom reference code using the code phase as an initial value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.