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. 10, 2005
Filed:
Oct. 01, 2001
Ichiro Imaizumi, Tokyo, JP;
Ichiro Imaizumi, Tokyo, JP;
Hitachi Kokusai Electric Inc., Tokyo, JP;
Abstract
There is disclosed a correlation circuit for spread spectrum communication, which can demodulate users having superposed demodulation phases and equaling or exceeding a sum of products calculation processing ability without enlarging a constitution. When a plurality of users more than a specified number exist in the same phase of the input signal from a memory, a controller controls a transfer speed of a shift of one sample in an input signal register in order to hold a sufficient time for completing calculation of a sum of products with all the plurality of users in a sum of products calculator in the correlation circuit for spread spectrum communication.