Robust Secure Precoding and Antenna Selection: A Probabilistic Optimization Approach for Interference Exploitation

Abstract

In this paper, to realize a power-efficient, user-centric and physical layer security-addressing system, we investigate total power minimization by jointly designing antenna selection and secure precoding for distributed antenna (DA) systems. Different from the conventional artificial noise (AN)-aided secure transmission, where AN is treated as an undesired element for the intended receiver (IR), we design AN such that it is constructive to the IR while keeping destructive to the eavesdroppers (Eves). Importantly, we investigate a practical scenario, where the IR and Eves' channel state information (CSI) is imperfectly obtained. To handle the CSI uncertainties, we solve the problem in a probabilistic manner, which statistically satisfies the IR' signal-to-interference-and-ratio (SINR) requirement by use of constructive AN and addresses security against the Eves. Simulation demonstrates our algorithm consumes much less power compared to the centralized antenna (CA) systems, as well as the DA systems with conventional AN processing. Last but not least, a user-centric and on-demand structure is presented by the algorithm, thanks to the adaptive DAs activation/deactivation mechanism.

Secure Dual-Functional Radar-Communication Transmission: Exploiting Interference for Resilience Against Target Eavesdropping

“…By observing problem (30), it is noted that the constraint (30b) is non-convex. To tackle the problem, likewise, we substitute µ w H U (θ p ) x 2 in the first term of (30b) with its first-order…”

“…In addition to increasing the secrecy, the generated AN was exploited to be constructive to energy harvesting in [27]. AN-aided CI precoding designs were proposed in [29]- [31], where a deterministic robust optimization algorithm was presented in [29] and a probabilistic optimization method was presented in [30], respectively. Furthermore, the work of [31] expanded the scenario to more practical cases where the CSI of eavesdropper is totally unknown.…”

Wireless Surveillance With Interference Exploitation in Unauthorized Underlaid D2D Networks

“…In [18], the authors investigated interference exploitation for secure transmission in MU-MIMO (multi-user multi-input multi-output) systems and proposed the beamforming designs. In [19], the robust secure precoding and antenna-selection method were proposed in a DA (distributed antenna) system to optimize the energy consumption of interference exploitation. In [20], the authors proposed a novel null-steering beamforming method to enhance the physical layer security in a non-orthogonal multiple access (NOMA) system.…”