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:
Mar. 26, 2002
Filed:
Mar. 26, 1999
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 t by means of a low-power timer so that a VC-TCXO , a reference signal group generation unit and a receiving unit are turned off and a modem unit is set to a sleep state. Upon resumption of receiving operation, a high-accuracy timer is supplied with a start (d) to require counting of time t and a part of a received signal is stored. A PN code phase of stored data is calculated in a PN code phase calculator during a period t to obtain an indication value i for a phase deviation. State vectors for short code and long code and further a reception time t are calculated on the basis of the indication value i to be set. When the high-accuracy timer counts t and produces 0V(d), demodulation operation by a rake demodulation unit , a demultiplexing unit and a descrambler unit is started in accordance with the setting and is continued during the reception time t