基于异步迭代联合收发算法的MIMO PLC安全

Asynchronous iterative algorithm with joint transceiving scheme on physicallayer security for MIMO power line communications

为避免电力线通信网的广播特性所带来的信息泄露风险,提出一种基于异步迭代算法的联合收发结构的物理层安全传输策略.在确保窃听者对秘密信号解码的均方误差高于所设定门限值以及发射功率约束的前提下,基于总体均方误差最小化准则,设计了采用异步迭代算法的联合收发机,从而求解出预编码矩阵和解码矩阵.仿真实验表明:在电力线信道环境下,所提出的联合收发方法可恶化窃听者的均方误差性能,使得窃听者安全速率为零,并且保证合法收发对安全速率为正,防止秘密信息被窃听.

To avoid the risk of information leakage caused by the broadcast characteristic of the power line communication network,a physical-layer security transmission strategy was proposed with joint transceiver based on asynchronous iterative algorithm.Explicitly,this transmission strategy was based on minimization criterion of sum mean squared error(MSE) at legitimate receivers.More specifically,a joint transceiver employing the asynchronous iterative algorithm was designed to solve the precoding and decoding matrices,while ensuring that MSE at the eavesdropper remains higher than a certain threshold and the transmitters constrain power limitation.Moreover,the performance of the proposed joint transceiver,including both MSE and secrecy rate,was characterized in simulation results.The proposed joint transceiver can effectively deteriorate eavesdropper’s MSE to prevent secret information from being eavesdropped,while ensuring legitimate transmitter-receivers’ secrecy rate is positive.