Live Demonstration of Spectrum Maximization and Encryption Techniques for 5G and Wideband NFC Applications

Novel techniques for significantly increasing 5G spectrum efficiency, providing obfuscated communications overlaid undetectably on top of 5G signaling, and wideband data transfer over near field coupled links will be demonstrated with a custom configured software defined radio (SDR) system. First, an adaptive antenna array approach to in-band full-duplex (IBFD) communications will be demonstrated with 5G compliant waveforms. The technique uses multiport transceivers and multi-element arrays at both ends of the link to provide self-interference rejection to allow the doubling of spectral efficiency via simultaneous transmission and reception (STAR). The demonstration will confirm up to 120 dB self-interference cancellation. Second, a new overlay modulation technique called "Orbital Modulation" will be demonstrated in a 5G compliant system. By using self-interference cancellation techniques, this method allows for the addition of non-interfering communication channels to existing systems operating in the same frequency band simultaneously with the original signal to provide true spectrum sharing. This innovative technique enables concealed and encrypted communications without requiring additional spectrum and can appreciably increase the data rates of traditional communication systems (if desired) without requiring additional spectrum. Finally, the custom SDR platform will also be used to demonstrate wideband communications using near field coupling to provide >100 Mbits/s data transfer over short distances, similar in concept to NFC but with orders of magnitude increased data transfer rate. This technique provides proximity security, low RF emissions, and low power "tap to transfer" capability for large data files.