Source-Based Jamming for Physical-Layer Security on Untrusted Full-Duplex Relay
Saman Atapattu, Nathan Ross, Yindi Jing, Malin Preniaratne
IEEE COMMUNICATIONS LETTERS | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | Published : 2019
We address the problem of secure wireless communications over an untrusted full-duplex (FD) relay based on the source jamming scheme. The optimal power allocation between the confidential signal and the jamming signal is derived to maximize the secrecy rate. Then, the corresponding secrecy outage probability (SOP) and the average secrecy rate (ASR) are analyzed. A tight approximation and an asymptotic result are further obtained for the single-antenna destination case both in simple forms. The large-antenna destination case is also analyzed rigorously. Further discussion reveals that transmit-power dependent self-interference has significant negative impact on the secrecy performance.
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Awarded by Australian Research Council (ARC) through the Discovery Early Career Researcher (DECRA)
This work was supported by the Australian Research Council (ARC) through the Discovery Early Career Researcher (DECRA) Award DE160100020.