School of Electrical Engineering, International University, Ho Chi Minh City 700000, Vietnam.
Vietnam National University, Ho Chi Minh City 700000, Vietnam.
Sensors (Basel). 2022 Aug 3;22(15):5812. doi: 10.3390/s22155812.
This paper considers hiding messages in overt transmissions with a full-duplex receiver, which emits artificial noise to secure its transmission connection while a transmitter opportunistically sends a covert message to a covert user. The warden's uncertainties in decoding the overt message and artificial-noise-received power are exploited to hide messages. Then, the covert throughput accompanied with the warden's average detection error probability are determined. The results show that increasing the transmit power of artificial noise or improving secure connection at the overt user will improve the covert performance. The results also show that the covert performance is improved when the self-interference cancellation is improved at the full-duplex receiver or when the warden is located close to the full-duplex receiver, indicating the positive impact of the overt performance on the covert performance.
本文考虑了在全双工接收机中隐藏明文中的信息，该接收机通过发射人工噪声来保护其传输连接，而发射机则机会主义地向秘密用户发送秘密信息。利用典狱官在解码明文和人工噪声接收功率方面的不确定性来隐藏信息。然后，确定了秘密吞吐量和典狱官的平均检测错误概率。结果表明，增加人工噪声的发射功率或改善明用户的安全连接将提高秘密性能。结果还表明，当全双工接收机的自干扰消除得到改善或当典狱官靠近全双工接收机时，秘密性能得到改善，这表明明性能对秘密性能的积极影响。
