Frequency diverse array beamforming for physical-layer security with directionally-aligned legitimate user and eavesdropper

Configuration of antenna array system to offer directional dependent modulation has the capability of enhancing the security level of data transmission against eavesdroppers’ attacks. In this paper, Frequency diverse array (FDA) antenna for physical–layer security in wireless communications has been proposed. The proposed method provide a range and angle dependent directional modulation scheme using FDA with frequency increments to improve physical-layer security point-to-point communications. It maintains the objective of changing the progressive phase shifts at each symbol transmission. Thus the emitted pattern at each symbol transmission period will be range and angle dependent. Consequently, the proposed method offers a robust physical-layer security for wireless transmission, as the transmitted signal will be deliberately distorted along the undesired positions, but can be successfully decoded by the intended receiver position. Numerical results are presented to validate the effectiveness of the proposed method. Keywords: Frequency diverse array; Physical-layer security; Directional antenna modulation; Wireless communication; Range and angle dependent.

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Physical-Layer Security for Frequency Diverse Array Communication System Over Nakagami-m Fading Channels

IEEE Systems Journal ◽

10.1109/jsyst.2019.2923103 ◽

2020 ◽

Vol 14 (2) ◽

pp. 2370-2381 ◽

Cited By ~ 2

Author(s):

Shilong Ji ◽

Wen-Qin Wang

Keyword(s):

Fading Channels ◽

Communication System ◽

Physical Layer Security ◽

Physical Layer ◽

Frequency Diverse Array

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Physical Layer Secrecy rate improvement in MISO using Artificial Fast Fading

International Journal of Scientific Research in Science Engineering and Technology ◽

10.32628/ijsrset196187 ◽

2019 ◽

pp. 402-407

Author(s):

Harsha Chauhan ◽

Vimal Nayak ◽

Rina Parikh

Keyword(s):

Physical Layer Security ◽

Weight Vector ◽

Physical Layer ◽

Security And Privacy ◽

Secrecy Rate ◽

Legitimate User ◽

Fast Fading ◽

Random Weights ◽

Rate Improvement ◽

Physical Layer Secrecy

Wireless communication system limits the security and privacy because of its broad cast nature. Physical layer security gives secure correspondence and having legitimate user to effectively get secure data. Among the physical layer security techniques, an artificial fast fading (AFF) technique dtrait’s the received signal quality of eavesdroppers by causing pseudo fast fading to the transmitting signals. This is realized by multiplying the signals to be transmitted by random weights every symbol interval. However, the AFF technique often increases the power of the weighted signals. In such cases, the weighted signals must be normalized before transmission. This causes energy loss in the legitimate receiver. Therefore, we consider minimizing the norm of the weight vector to prevent the power of the weighted signals from being increased. In this, we propose and achieve Physical layer secrecy rate in MISO system using artificial fading plus information theory.

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