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:
Apr. 10, 2012
Filed:
Mar. 07, 2008
Bruno Lozach, Lannion, FR;
José Bollo, Louannec, FR;
Alain Le Guyader, Lannion, FR;
France Telecom, Paris, FR;
Abstract
A method for generating mutually orthogonal signals having a controlled spectrum, includes the generation of a plurality of mutually orthogonal, controlled-power discrete spectra s(i) having dimension Q, i designating spectrum number. The aforementioned spectra represent time signals in the spectral range and have a modulus μ that is constant in a spectral line designation set G and zero everywhere else. The method includes determining at least part of a complex Hadamard matrix H of order d=w in the case of spectra of real signals and d=2.w in the case of spectra of complex signals; determining the extension P of matrix H from G and dimension Q; and obtaining controlled-power spectra s(i)=μ.P(H[.][i]), wherein H[.][i] designates the icolumn of matrix H. In addition, a plurality of mutually orthogonal time signals s(i) is also generated from the discrete complex signals.