| US 7,394,848 B2 | ||
| Method and apparatus for time equalization | ||
| Takashi Kaku, Kawasaki (Japan); Hiroyasu Murata, Kawasaki (Japan); and Hideo Miyazawa, Inagi (Japan) | ||
| Assigned to Fujitsu Limited, Kawasaki (Japan) | ||
| Filed on Jan. 15, 2003, as Appl. No. 10/347,154. | ||
| Application 10/347154 is a continuation of application No. PCT/JP00/08565, filed on Dec. 04, 2000. | ||
| Prior Publication US 2003/0138037 A1, Jul. 24, 2003 | ||
| Int. Cl. H03H 7/30 (2006.01) | ||
| U.S. Cl. 375—229 | 12 Claims |
| 1. A time equalization method which performs an equalization on a time axis for a plurality of received signals comprising:
a first step of extracting timing phase information from a power spectrum of each of the plurality of received signals whose
amplitudes are each modulated by using two reference point signals including a zero-point per frame, the first step comprising:
generating a first vector signal of the power spectrum,multiplying the first vector signal by a second vector signal to rotate the first vector signal,
performing a sign decision of the rotated first vector signal, integrating a result of the sign decision to be outputted as
the timing phase information, and
performing a vector conversion of the integrated value to be fed back as the second vector signal; and
a second step of performing timing phase, synchronization of each of the plurality of received signals with the timing phase
information.
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