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:
Dec. 21, 1999
Filed:
Jul. 08, 1997
Kenneth S Barron, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A method, executed in a microprocessor, for providing a shift-and-add mask, M=m.sub.1, m.sub.2, . . . , m.sub.N-1, m.sub.N, for a pseudo-noise sequence generator ('PNSG'). The PNSG generates a first pseudo-noise ('PN') code, and has N stages, each stage being at one of two states. The PNSG also has an associated shifter for generating a shifted PN code which is the same code as the first PN code, but delayed by K chips. The shifted PN code is generated as the inner product of the shift-and-add mask with the states of the stages of the PNSG. According to the inventive method, a value of K is provided, and it is determined whether K is 0. If K is 0, M is provided such that m.sub.N =1 and, for all n.noteq.N, m.sub.n =0. However, if K is not 0, it is determined whether K is greater than N. If K is greater than N, the remainder, R, of the division D.sup.K-1 /f(D), is determined, where