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. 18, 2000
Filed:
Jun. 10, 1999
Thomas R Giallorenzi, Herriman, UT (US);
Samuel C Kingston, Salt Lake City, UT (US);
Lee A Butterfield, W. Jordan, UT (US);
William T Ralston, Riverton, UT (US);
Leon L Nieczyporowicz, West Jordan, UT (US);
Alan E Lundquist, Salt Lake City, UT (US);
L-3 Communications Corporation, New York, NY (US);
Abstract
A method and apparatus for constructing a series of PN code sets that can be used for multirate synchronous and quasi-synchronous CDMA systems. The construction technique produces PN codes that are balanced, and that furthermore do not require any synchronization of neighboring base stations. The method is a non-recursive method that uses a permuted orthogonal matrix to modulate permuted orthogonal matrices to create PN codes that support multirate operation. Furthermore, the codes constructed using the method have very good spectral properties (if chosen properly) when the code length, n, is reasonably large.