Time-varying metamaterial-enabled directional modulation for physical layer security in wireless communication links
AssigneeRutgers, The State University of New Jersey
InventorsAlireza Nooraiepour, Shaghayegh Vosoughitabar, Chung-Tse Michael Wu, Waheed U. Bajwa, Narayan B. Mandayam
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Abstract
Various embodiments comprise systems, methods, architectures, mechanisms and apparatus providing secure physical layer (PHY) transmission via metamaterial (MTM) leaky-wave antennas (LWAs) using directed modulation (DM) transmitters such as for orthogonal frequency-division multiplexing (OFDM) and non-contiguous (NC) OFDM transmissions, where the DM functionalities exploit the property of time-modulated arrays (TMAs) realized in 1-D and 2-D spaces through the MTM-LWAs.
Claims16
A transmitter, comprising:
- first and second transmission lines, each transmission line comprising a predefined number of unit cells separated from each other by a distance p, each first transmission line unit cell cooperating with a corresponding second transmission line unit cell to form thereby a respective unit cell stage having two inputs and two outputs;
- and
- a plurality of DPDT switches, each DPDT switch disposed between respective prior and subsequent unit cell stages;
- wherein the second transmission line unit cells comprise microstrip unit cells configured to propagate therethrough an input signal to provide thereby a transmission signal configured for free space radiation;
- wherein the first transmission line unit cells comprise lumped element unit cells having a circuit model equivalent to that of corresponding second transmission line microstrip unit cells;
- wherein the DPDT switches are controlled in a manner causing directional modulation (DM) of the transmission signal such that the transmission signal exhibits a low bit error rate (BER) to a receiver at a desired location.
A 2D directional modulation (DM) transmitter, comprising:
- a time-modulated array (TMA) formed as a plurality of TMA branches, each TMA branch configured to receive a common input signal for transmission thereby;
- each TMA branch comprising a phase delay module and a composite right/left-handed metamaterial leaky-wave antenna (CRLH MTM LWA), the phase delay module configured to receive the common input signal and provide a respective phase delayed input signal to the respective CRLH MTM LWA for transmission thereby during an on-state of the branch, the CRLH MTM LWA being separated from a CRLH MTM LWA of an adjacent TMA branch by a distance d;
- each branch having an on-off state controlled in a manner causing directional modulation (DM) of the transmission signal such that the transmission signal exhibits a low bit error rate (BER) to a receiver at a desired location.
A 2D directional modulation (DM) transmission method, comprising:
- receiving a common input signal for transmission at each of a plurality of branches of a time-modulated array (TMA);
- each TMA branch imparting a respective a phase delay to a received common input signal and, during an on-state of the TMA branch, transmitting the respective phase delayed common input signal via a respective composite right/left-handed metamaterial leaky-wave antenna (CRLH MTM LWA) separated from a CRLH MTM LWA of an adjacent TMA branch by a distance d;
- each branch having an on-off state controlled in a manner causing directional modulation (DM) of the transmission signal such that the transmission signal exhibits a low bit error rate (BER) to a receiver at a desired location.
Dependencies are inferred from the claim text.