一种基于预编码的MIMO无线隐信道

doi:10.19665/j.issn1001-2400.2022.02.006

Abstract

Abstract:

To conceal the existence of secret information,the wireless covert channel established in modulation of the physical layer converts secret information into artificial noise for transmission.In multiple-input multiple-output (MIMO) communication scenarios,due to the openness of the transmission medium,the detector can use the correlation of each antenna signal to discover the covert channel.To solve this problem,this paper proposes a MIMO wireless covert channel based on precoding.Assuming that both the sender and detector can obtain the MIMO channel state information (CSI),the sender can use this CSI to pre-encode the generated artificial noise to remove correlation of the multiple signals received by the detector.The receiver can generate the precoding matrix through the CSI transmitted through the public channel,and then extract secret information.Simulation results show that compared with the existing method,the proposed MIMO wireless covert channel removes the correlation of the multiple signals received by the detector,and effectively improves the undetectability,and that the reliability has been improved to a certain extent.

Key words: wireless covert channel, multiple in multiple out, undetectability, reliability, correlation, precoding

CLC Number:

TP391

CAO Pengcheng,LIU Weiwei,LIU Guangjie,MAO Weiwei,DAI Yuewei. MIMO wireless covert channel based on precoding[J].Journal of Xidian University, 2022, 49(2): 42-49.

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References 18

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MIMO wireless covert channel based on precoding

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