Apparatus and methods for symbol timing error detection, tracking and correction
US9020054B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Sep 30, 2013 |
| Grant date | Apr 28, 2015 |
| Priority date | — |
| Expiry date | Sep 30, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2695
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems and methods for adjusting timing in a communication system, such as an OFDM system are described. In one implementation an error signal is generated to adjust the timing of a variable rate interpolator so as to adjust FFT timing. The error signal may be based on detection of significant peaks in an estimate of the impulse response of the channel, with the peak locations being tracked over subsequent symbols and the system timing adjusted in response to changes in the peaks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.