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:
Sep. 07, 2004
Filed:
Aug. 17, 1999
Shuichi Kawama, Kyoto, JP;
Kunihiko Iizuka, Sakurai, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A matched filter for inversely spreading a received signal using spreading signals in a spread spectrum communications receiver includes: a plurality of correlators for determining cross-correlation functions of a received signal which has been sampled at a certain timing and spreading signals having a certain section length; a delay circuit for successively transferring the spreading signals having a certain section length with respect to the plurality of correlating means by delaying timings of the transfer by a period equal to the section length of the spreading signals; and a multiplexer for successively selecting one of the cross-correlation functions outputted from the plurality of correlating means, by a period equal to a sampling interval of the received signal. As a result, a matched filter with a small circuit size and low power consumption is realized.