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:
Jul. 15, 2003
Filed:
Nov. 30, 2000
Keiji Takakusaki, Yokohama, JP;
Katsuhiko Hiramatsu, Yokosuka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A reception radio circuit and a reception radio circuit receive radio communication signals from a mobile station and calibration signals from a CAL-CDMA radio signal transmission section through respective a reception antenna and a reception antenna , followed by performing down-conversion of received signals. A reception CDMA signal processing section B (for CAL) measures characteristic errors of respective reception radio circuits while observing the calibration signals undergoing down-conversion, before holding the measured characteristic errors in a compensation table of a recorder . A reception CDMA signal processing section A (for communication) performs CDMA demodulation processing of radio communication signals from the mobile station , which signals are subjected to the down-conversion, at the same time as observing operation of the reception CDMA signal processing section B (for CAL) , on the basis of the characteristic errors held in the compensation table.