The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 17, 2005
Filed:
Jan. 26, 2001
Joichi Saito, Yokohama, JP;
Hideki Shimizu, Tokyo, JP;
Naoki Tsubaki, Yokohama, JP;
Yuuji Ishida, Fujisawa, JP;
Toshinori Suzuki, Tokyo, JP;
Joichi Saito, Yokohama, JP;
Hideki Shimizu, Tokyo, JP;
Naoki Tsubaki, Yokohama, JP;
Yuuji Ishida, Fujisawa, JP;
Toshinori Suzuki, Tokyo, JP;
Hitachi, Ltd., , JP;
KDDI Corporation, , JP;
Abstract
A low-cost communication system utilizing a code division multiple access, which controls scale-up of an apparatus due to the provision of an interference suppressing function in a base transceiver station, prevents the reduction of channel utilization efficiency, and enables a high-quality communication. Conventionally, a signal obtained through an interference cancellation stage process has been processed at subsequent cascade-connected stages. The interference cancellation stage process has been carried out by cascade-connecting several circuits performing the same process in a multi-stage interference-canceling device. However, in the present invention, by performing a demodulation process for generating replica signals, feeding back the replica signals to a correlation circuit for another demodulation process, and repeating the same signal process, the interference cancellation stage process is carried out. Such a configuration enables reduction of hardware.