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In this letter we present a physical-layer-security (PLS) experimental platform that realizes secure transmission over a two-way untrusted relaying system. A novel PLS approach called constellation overlapping is adopted to provide both confidentiality and reliability, and sophisticated protocols are developed as well to implement synchronization, channel state information (CSI) acquisition, self-interference cancellation, and signal recovery. Experimental results in the indoor environment are shown to demonstrate the effectiveness of our design.
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Sun et al. (2020) studied this question.
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