| US 7,545,777 B2 | ||
| CDMA communication system and method | ||
| Masayuki Ariyoshi, Mitaka (Japan); Nobukazu Doi, Hachioji (Japan); Tesshin Shiga, Kodaira (Japan); and Yoshito Ohta, Tokorozawa (Japan) | ||
| Assigned to Hitachi Communication Technologies, Ltd., Tokyo (Japan); and Hitachi Denshi Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Jun. 09, 2003, as Appl. No. 10/456,577. | ||
| Application 10/456577 is a continuation of application No. 09/550807, filed on Apr. 18, 2000, granted, now 6,597,676. | ||
| Application 09/550807 is a continuation of application No. 09/314302, filed on May 19, 1999, granted, now 6,137,786. | ||
| Application 09/314302 is a continuation of application No. 08/888603, filed on Jul. 07, 1997, granted, now 5,930,244. | ||
| Claims priority of application No. 8-178935 (JP), filed on Jul. 09, 1996. | ||
| Prior Publication US 2003/0214932 A1, Nov. 20, 2003 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H04B 7/216 (2006.01) | ||
| U.S. Cl. 370—335 [375/260; 370/342] | 8 Claims |
| 1. A communication method in a communication system for performing communication between a base station and terminal stations,
comprising the steps of:
transmitting, from each terminal station, a first signal;
performing, in the base station, a timing acquisition of the first signal from each terminal station and transmitting first
difference information for coarse adjustment which indicates a phase difference between the first signal and a reference phase;
generating, in each terminal station, an orthogonal signal having a phase set in accordance with the first difference information
and transmitting a second signal using the generated orthogonal signal;
performing, in the base station, a tracking of the second signal from each terminal station and transmitting a second difference
information for fine adjustment between the second signal and the reference phase; and
setting, in each terminal station, a delay amount of a delay circuit in accordance with the second difference information,
wherein the delay circuit is between an antenna of each terminal station and a generator means for generating the orthogonal
signal,
wherein the first difference information is input to the generator means and the second difference information is input to
the delay circuit.
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