Document Type

Patent

Publication Date

April 2012

Patent Number

8149685

Abstract

Methods for secure OFDM communications include changing the length of OFDM symbols in a pseudo-random fashion by appending a totally random signal to some of the OFDM symbols. An adaptive cyclic prefix is provided for covert and spectrally efficient communication. A developed PN based random data addition provides further security by removing the chance of combining synchronization information over several OFDM symbols.

Application Number

11/162,245

Assignees

University of South Florida

Filing Date

09/02/2005

Primary/U.S. Class

370/208

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