| US 7,570,666 B2 | ||
| Method and apparatus for guard interval detection in multi-carrier receiver | ||
| Hung-Hsiang Wang, Hsinchu (Taiwan) | ||
| Assigned to Industrial Technology Research Institute, Hsinchu (Taiwan) | ||
| Filed on Feb. 01, 2005, as Appl. No. 11/46,766. | ||
| Prior Publication US 2006/0171367 A1, Aug. 03, 2006 | ||
| Int. Cl. H04J 3/06 (2006.01) | ||
| U.S. Cl. 370—503 [370/504] | 16 Claims |
| 1. A guard interval detector for determining a guard interval length of an input signal, said guard interval length being
one of a plurality of available guard interval lengths, said guard interval detector comprising:
an auto-correlator for generating a correlation result in response to said input signal;
a power density calculator for generating a plurality of power density results in response to said correlation result and
said available guard interval lengths; and
a maximum detector for generating a determination result in response to the maximum value of said plurality of power density
results, wherein said maximum detector comprises:
a plurality of sub-maximum detection blocks for determining a plurality of sub-maximum values of said plurality of power density
results, respectively; and
a main maximum detection block for determining the maximum value of said plurality of sub-maximum values and generating said
determination result.
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