Enhanced physical layer security using monopulse antennas

The paper proposes a new method for private point-to-point communication. It employs a monopulse antenna system, where the summary beam is used to transmit the useful signal to the intended receiver, while the differential beam is used to generate noise, in order to bury the signal for angles other than boresight. The method is tested using simulated QPSK modulation, providing a beamwidth with bit error rate below 10-4 within ±6°, while raising BER steep to 0.5 at 32°.