A Point-to-Point Security Communication System: Artificial Noise Jamming Insertion

This paper mainly studies the point-to-point security transmission problem. A point-to-point transmission scenario consists of legitimate device, an unauthorized device (eavesdropper) and a jamming device (jammer). Generally, unauthorized devices can eavesdrop on confidential information in wireless transmission. Current jamming techniques usually interfere with eavesdroppers while also reducing the reception signal-to-noise ratio of legitimate users. To cope with the above challenges, the broadband waveform OFDM (Orthogonal frequency division multiplexing, OFDM) jamming insertion technique and narrowband waveform PDM (power division multiplexing, PDM) jamming insertion are proposed. The technique inserts a jamming signal orthogonal to the message in the time frequency domains and the power domain, respectively. By changing the form of the whole signal, it can not only protect the communication between legitimate users, but also interfere with illegal eavesdropping users. The experimental results show that the proposed technique can effectively interfere with eavesdroppers and improve the quality of service of legitimate users.