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:
Apr. 25, 2006
Filed:
Dec. 27, 2001
Shigeyuki Sudo, Yokohama, JP;
Osamu Hasegawa, Hitachinaka, JP;
Toshiya Eguchi, Kamakura, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A receiver for the CDMA system, in order to reduce a power consumption during a suspension period of intermittent receiving operation, monitors a suspension period tby means of a low-power timerso that a VC-TCXOa reference signal group generation unitand a receiving unitare turned off and a modem unitis set to a sleep state. Upon resumption of receiving operation, a high-accuracy timeris supplied with a start (d) to require counting of time tand a part of a received signal is stored. A PN code phase of stored data is calculated in a PN code phase calculatorduring a period tto obtain an indication value i for a phase deviation. State vectors for short code and long code and further a reception time tare calculated on the basis of the indication value i to be set. When the high-accuracy timercounts tand producesV(d), demodulation operation by a rake demodulation unita demultiplexing unitand a descrambler unitis started in accordance with the setting and is continued during the reception time t