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. 01, 2014
Filed:
Nov. 09, 2009
Julien DE Rosny, Nogent sur Marne, FR;
Geoffroy Lerosey, Paris, FR;
Arnaud Tourin, Sevres, FR;
Mathias Fink, Meudon, FR;
Julien De Rosny, Nogent sur Marne, FR;
Geoffroy Lerosey, Paris, FR;
Arnaud Tourin, Sevres, FR;
Mathias Fink, Meudon, FR;
Time Reversal Communications, Cergy Saint Christophe, FR;
Centre National de la Recherche Scientifique-CNRS, Paris, FR;
Abstract
A method for transmitting digital data on a communication channel, between a transmitter base comprising N transmission antennas and K receivers. A signal carrier of frequency fand M sub-carriers of index m are used, adapted to transport K streams of digital data sin parallel between the transmitter base and each receiver. The method comprises a step in which N.M complex symbols t(m) are calculated from K.M symbols s(m), by where * denotes a complex conjugate, H(m) is a complex value estimating the transfer function of the communication channel between the transmission antenna n and the receiving antenna k at a corresponding frequency of the sub-carrier m, and αis a normalization coefficient.