Noise floor independent delay-locked loop discriminator
US7995683B2 · kind B2 · utility
3Cited by
59References
20Claims
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Key dates
| Filing date | Oct 24, 2007 |
| Grant date | Aug 9, 2011 |
| Priority date | — |
| Expiry date | Apr 15, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/70715
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method for providing code tracking in a CDMA based communications receiver. In example systems and methods, a CDMA receiver, such as a GPS receiver, receives a signal and demodulates the signal to yield a digital IF signal. The digital IF signal is down-converted to a received code signal. Early, prompt and late correlation results are determined by correlating the received code signal with early, prompt and late duplicates of the received code signal. The early, prompt and late correlation results are used to calculate a code phase error using a noise-floor independent function of all three correlation results.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.