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:
Feb. 26, 2013
Filed:
Jul. 01, 2009
Alan J. Michaels, West Melbourne, FL (US);
David B. Chester, Palm Bay, FL (US);
Alan J. Michaels, West Melbourne, FL (US);
David B. Chester, Palm Bay, FL (US);
Harris Corporation, Melbourne, FL (US);
Abstract
Systems () and methods for selectively controlling access to multiple data streams which are communicated using a shared frequency spectrum and spreading code. The methods involve forming a global data communication signal () by amplitude modulating a global data signal () comprising global data symbols and forming a phase modulated signal () by phase modulating a protected data signal. The phase modulated signal represents protected data symbols. The methods also involve forming a protected data communication signal () by changing phase angles of the protected data symbols using a variable angle Ø determined by a random number source and combining the protected data signal with a spreading sequence (CSC). The methods further involve combining the global and protected data communication signals to form an output communication signal () having a spread spectrum format. The output communication signal is transmitted over a communications channel ().