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:
Sep. 21, 1999
Filed:
Sep. 06, 1996
Yannick Deville, Villecresnes, FR;
Laurence Andry, Yerres, FR;
U.S. Philips Corporation, New York, NY (US);
Abstract
The system includes a base station (1) which communicates with a plurality of data carriers (2.sub.1, 2.sub.2) via wireless links. In order to enable the station (1) to identify several data carriers simultaneously, the system includes a device (15) for the separation of sources and also several demodulation units (12.sub.1, 12.sub.2). Depending on the type of modulation, the type of link used, and the arrangement of the source separation device (15) with respect to the demodulation units, the signals received by the source separation device can be convolutional mixtures or instantaneous linear mixtures of the signals transmitted by the data carriers. In order to process the different types of signal received, the source separation device may have a recursive structure, a direct structure or a mixed structure. Adaptation means (105) calculate filtering coefficients which are adapted to enable the source separation device (15) to separate the estimated identification signals for each data carrier requesting communication with the base station.