Coarse frequency estimation in an OFDM receiver based on autocorrelation of accumulated samples
US7274758B1 · kind B1 · utility
3Cited by
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9Claims
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Key dates
| Filing date | Feb 2, 2004 |
| Grant date | Sep 25, 2007 |
| Priority date | — |
| Expiry date | Dec 18, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0095
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An OFDM receiver has an autocorrelation circuit configured for generating an autocorrelation result from samples of received short preamble symbols in a received data packet, where the autocorrelation circuit generates each autocorrelation result based on accumulation of the samples having been received for the short preamble symbols. Hence, by using all received samples of the short preamble symbols, the autocorrelation based on accumulated samples minimizes the effect of noise and provides a more accurate coarse frequency estimation result.
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