Secure Spatial Modulation With a Full-Duplex Receiver

We propose and investigate a full-duplex receiver assisted secure spatial modulation (FDR-SSM) scheme, whose security is enhanced by the jamming sent from a full-duplexing legal receiver. In our FDR-SSM system, jamming signals are designed to allow the legal receiver free from self-interference, while imposing time-varying interference on the passive eavesdropper. Therefore, the FDR-SSM scheme can maintain all the advantages of spatial modulation. In this letter, the secrecy performance of the FDR-SSM system is analyzed via analyzing its ergodic secrecy rate (ESR). Furthermore, the asymptotic ESR is analyzed, when assuming that the number of transmit antennas at the legal receiver approaches infinite. Finally, performance results are provided to demonstrate the efficiency of the FDR-SSM scheme, and to verify the analytical expressions.

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