Method for estimating a frequency offset of a modulated bandpass signal
US7657231B2 · kind B2 · utility
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7References
19Claims
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Key dates
| Filing date | Apr 19, 2006 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Oct 29, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0065
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a method for estimating a frequency offset (fe, Ωe) of a modulated bandpass signal (s) with an assumed carrier frequency (Ω0) in a mobile radio receiver, times (τj) of the zero cross-overs of the bandpass signal are determined in a first step. Using the times (τj) of the zero cross-overs and the assumed carrier frequency (Ω0), the required frequency offset (fe, Ωe) is estimated in a further step by calculating the DC component of an instantaneous frequency which is given by the frequency of the bandpass signal less the assumed carrier frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.