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.

中文翻译：

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基于星座重叠的双向不可信中继安全传输：方法、实现和实验结果

在这封信中，我们提出了一个物理层安全 (PLS) 实验平台，该平台可在双向不可信中继系统上实现安全传输。采用一种称为星座重叠的新型 PLS 方法来提供机密性和可靠性，并且还开发了复杂的协议来实现同步、信道状态信息 (CSI) 获取、自干扰消除和信号恢复。室内环境中的实验结果证明了我们设计的有效性。