An Efficient PLS Scheme for Coded MIMO Systems Under Imperfect Channel Estimation

In recent years, the concept of physical layer security (PLS) has emerged as a promising approach to supplement tra-ditional cryptographic solutions. However, many PLS techniques rely on accurate knowledge of the channel state information (CSI) at the transmitter, which can be difficult to obtain in real-world scenarios. This paper presents a physical layer security scheme designed to enhance the security of a coded multi-input multi-output (MIMO) system operating under imperfect channel estimation conditions. To achieve a high level of security, we adopt a strategy that involves a channel-dependent interleaving scheme for the coded MIMO system, and combined additional simple coding schemes to prevent serious performance degradation caused by CSI error. Simulation results presented in this paper demonstrate that the proposed scheme effectively protects the transmitted data without any information leakage to the eavesdronner.