Secure Interference Exploitation Precoding in MISO Wiretap Channel: Destructive Region Redefinition with Efficient Solutions

09/20/2019
by   Ye Fan, et al.
0

In this paper, we focus on the physical layer security for a K-user multiple-input-single-output (MISO) wiretap channel in the presence of a malicious eavesdropper, where we propose several interference exploitation (IE) precoding schemes for different types of the eavesdropper. Specifically, in the case where a common eavesdropper decodes the signal directly and Eve's full channel state information (CSI) is available at the transmitter, we show that the required transmit power can be further reduced by re-designing the `destructive region' of the constellations for symbol-level precoding and re-formulating the power minimization problem. We further study the SINR balancing problems with the derived `complete destructive region' with full, statistical and no Eve's CSI, respectively, and show that the SINR balancing problem becomes non-convex with statistical or no Eve's CSI. On the other hand, in the presence of a smart eavesdropper using maximal likelihood (ML) detection, the security cannot be guaranteed with all the existing approaches. To this end, we further propose a random jamming scheme (RJS) and a random precoding scheme (RPS), respectively. To solve the introduced convex/non-convex problems in an efficient manner, we propose an iterative algorithm for the convex ones based on the Karush-Kuhn-Tucker (KKT) conditions, and deal with the non-convex ones by resorting to Taylor expansions. Simulation results show that all proposed schemes outperform the existing works in secrecy performance, and that the proposed algorithm improves the computation efficiency significantly.

READ FULL TEXT
research
08/08/2019

Rethinking Secure Precoding via Interference Exploitation: A Smart Eavesdropper Perspective

Based on the concept of constructive interference (CI), multiuser interf...
research
07/17/2021

Downlink MIMO-RSMA with Successive Null-Space Precoding

In this paper, we consider the precoder design for an underloaded or cri...
research
11/08/2020

Joint Constellation Rotation and Symbol-level Precoding Optimization in the Downlink of Multiuser MISO Channels

This paper tackles the problem of the simultaneous interference among th...
research
07/21/2020

Intelligent Reflecting Surfaces Assisted Secure Transmission Without Eavesdropper's CSI

In this letter, improving the security of an intelligent reflecting surf...
research
04/03/2018

Symbol-Level Precoding Design Based on Distance Preserving Constructive Interference Regions

In this paper, we investigate the symbol-level precoding (SLP) design pr...
research
05/07/2018

Robust Design of Power Minimizing Symbol-Level Precoder under Channel Uncertainty

In this paper, we investigate the downlink transmission of a multiuser m...
research
11/17/2022

Robust Downlink Multi-Antenna Beamforming with Heterogenous CSI: Enabling eMBB and URLLC Coexistence

Two of the main problems to achieve ultra-reliable low-latency communica...

Please sign up or login with your details

Forgot password? Click here to reset