Silent Antenna Hopping Transmission Technique for Secure Millimeter-Wave Wireless Communication

Abstract

In this paper, we propose a new wireless communication transmission technique called Silent Antenna Hopping (SAH) transmission technique, to enhance physical layer security. SAH consists of a conventional phased-array transmitter followed by antennas with an on-off switching circuit. The proposed solution maintains the objective of scrambling the constellation points in both amplitude and phase in undesired directions, while preserving a clear constellation in the target direction. SAH is different from the previously-used work in the following ways:(1) SAH is not restricted to the use of phase modulation, and can accept any modulation type including QAM, (2) it does not need to modulate the signal in the RF domain, where the conventional phased-array transmitter circuits remain unchanged, (3) in the far-field, SAH scrambles the signal constellation by randomly switching-off only one of the transmitting antennas, (4) SAH can easily integrated with the current infrastructure of phased-array transmitters, and (5) SAH breaks up the correlation between the data rates and the switching speed. We analysed the SAH performance and derived an exact expression of the bit error probability, and we derived the secrecy capacity in a closed form. The results show that SAH is a simple and very efficient solution to improve the physical layer security of mm-wave communication.

Fixed Region Beamforming Using Frequency Diverse Subarray for Secure mmWave Wireless Communications

“…The widely used conventional phased array (CPA) can enhance the transmission security with fixed angle beamforming (FAB), which reinforces the mainlobe of beam towards the desired receiver while suppressing the sidelobe in the undesired directions [20]- [22]. In order to improve PLS performance, some FAB-based artificial noise (AN) methods based on CPA, such as antenna subset modulation (ASM) [21], switch phase array (SPA) transmission [22]- [24], inverted antenna subset transmission (IAST) [25], programmable weight phased-array transmission (PWPA) [26], are proposed to interfere the eavesdropper located in the sidelobe direction by scrambling the received constellation intentionally. These FAB methods achieve excellent PLS performance when the eavesdropper locates in the sidelobe direction.…”