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.
Yucek, Tevfik and Arslan, Huseyin, "Covert OFDM transmission using cyclic prefix" (2012). USF Patents. 310.
University of South Florida