High Performance, High Security Wireless Network via Space Time Coded Carrier Interferometry Spreading Spectrum

The objective of this project is to design and demonstrate the feasibility of an innovative high performance, high security wireless network based on space time coded carrier interferometry spreading which is capable of unprecedented information assurance in military wireless communications. Specifically, a novel spectrally coded (namely carrier interferometry code) waveform is employed in current OFDM technology to spread the information across all OFDM transmission subcarriers. The spreading of the information over all subcarriers introduces frequency diversity and leads to higher BER performance in multi-path wireless channels. Furthermore, the information spreading equips the wireless network with an anti-jamming capability. Additionally, the carefully chosen carrier interferometry code combines the benefits of single carrier transmission with multi-carrier transmission and provides a much lower peak to average power ratio (PAPR) than that of current OFDM systems. Most importantly, the carrier interferometry spreading is naturally integrated with permutation cypher and polyphase linear feedback shift registers stream cipher to provide RF watermarking capability and extremely high security to current wireless networks. The carrier interferometry spreading is also combined with space time coding and multiple input/output antennas to adaptively adjust the waveform design to obtain better information assurance in a dynamic environment.