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. 16, 2004
Filed:
May. 26, 2000
Atsushi Takasaki, Yokosuka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A spreading code generator generates a spreading code specified by a matrix order and row number, which are matrix elements. The spreading code generator includes a repetitive division circuit for repeatedly dividing a row number by 2 a number of times equivalent to the matrix order; a reference-coefficient storage unit for storing reference coefficients obtained as a result of the repetitive division; a first code-sequence generating unit for generating a first code sequence by repeating inverted extension or non-inverted extension in dependence upon bits up a kth bit of the reference coefficient; a second code-sequence generating unit for generating a second code sequence by repeating inverted extension or non-inverted extension in dependence upon a (k+1)th bit onward of the reference coefficient; first and second shift registers for storing the first and second code sequences, respectively, extended by the first and second code generating units, respectively; and an exclusive-OR circuit for taking the exclusive-OR of the outputs of the first and second registers.