Adaptive Full-Duplex Jamming Receiver for Secure D2D Links in Random Networks

• Published in: IEEE transactions on communications Vol. 67; no. 2; pp. 1254 - 1267
• Main Authors: Wang, Hui-Ming, Zhao, Bing-Qing, Zheng, Tong-Xing
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.02.2019; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Complexity theory; device-to-device (D2D) communication; Device-to-device communication; Eavesdropping; full-duplex (FD); Jamming; Physical layer security; Receivers; Secrecy aspects; secrecy outage; secrecy throughput; stochastic geometry; Switches; Switching theory; Throughput
• ISSN: 0090-6778; 1558-0857
• DOI: 10.1109/TCOMM.2018.2880216

Device-to-device (D2D) communication raises new transmission secrecy protection challenges, since conventional physical layer security approaches, such as multiple antennas and cooperation techniques, are invalid due to its resource/size constraints. The full-duplex (FD) jamming receiver, which radiates jamming signals to confuse eavesdroppers when receiving the desired signal simultaneously, is a promising candidate. Unlike existing endeavors that assume the FD jamming receiver always improves the secrecy performance compared with the half-duplex (HD) receiver, we show that this assumption highly depends on the instantaneous residual self-interference cancellation level and may be invalid. We propose an adaptive jamming receiver operating in a switched FD/HD mode for a D2D link in random networks. Subject to the secrecy outage probability constraint, we optimize the transceiver parameters, such as signal/jamming powers, secrecy rates, and mode switch criteria, to maximize the secrecy throughput. Most of the optimization operations are taken off-line and only very limited on-line calculations are required to make the scheme with low complexity. Furthermore, some interesting insights are provided, such as the secrecy throughput is a quasi-concave function. Numerical results are demonstrated to verify our theoretical findings, and to show its superiority compared with the receiver operating in the FD or HD mode only.