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. 06, 2010
Filed:
Sep. 23, 2004
Michael Kloos, Belvidere, IL (US);
Michael Kloos, Belvidere, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A communication device encrypts symbols at a physical layer in order to improve encryption of data transmitted over a wireless link. A symbol mapper of the communication device receives a bit stream comprising multiple bits and maps the multiple bits to multiple symbols. An amplitude and phase adjuster of the communication device receives the multiple symbols and encrypts the symbols by applying at least one of a phase shift and an amplitude adjustment to each symbol of the multiple symbols to produce multiple encrypted symbols for transmission over a wireless link. In another embodiment of the present invention, a communication device is provided that is able to decrypt the encrypted symbols by applying at least one of a phase shift and an amplitude adjustment to each encrypted symbol that corresponds to a phase shift or an amplitude adjustment applied to the symbol by a transmitting communication device.