| US 7,616,710 B2 | ||
| Frequency offset estimating method and receiver employing the same | ||
| Pan-Soo Kim, Daejon (Korea, Republic of); Yun-Jeoug Song, Daejon (Korea, Republic of); Byoung-Hak Kim, Daegu (Korea, Republic of); Deock-Gil Oh, Daejon (Korea, Republic of); and Ho-Jin Lee, Daejon (Korea, Republic of) | ||
| Assigned to Electronics and Telecommunications Research Institute, Daejon (Korea, Republic of) | ||
| Filed on Dec. 07, 2005, as Appl. No. 11/297,257. | ||
| Claims priority of application No. 10-2004-0103061 (KR), filed on Dec. 08, 2004; and application No. 10-2005-0077356 (KR), filed on Aug. 23, 2005. | ||
| Prior Publication US 2006/0146961 A1, Jul. 06, 2006 | ||
| Int. Cl. H04L 27/14 (2006.01) | ||
| U.S. Cl. 375—334 | 12 Claims |
| 1. A method for estimating a frequency offset in a communication system, comprising the steps of:
extracting more than three discrete samples from a demodulated signal, where each of the extracted discrete samples has a
value greater than a critical value of a power spectrum density function of the demodulated signal;
identifying a subset of the extracted discrete samples, each extracted discrete sample in the subset is closer to the maximum
value of the power spectrum density function than any of the extracted discrete samples not in the subset;
interpolating, with a quadratic non-linear function, all of the extracted discrete samples in the subset except a maximal
discrete sample that has the maximum value among the extracted discrete samples; and
estimating the frequency offset from a maximum point of the quadratic non-linear function.
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