全双工干扰接收机速率自适应隐蔽通信设计

Design of Rate Adaptive Covert Communication with a Full-Duplex Interference Receiver

【目的】在全双工干扰接收机隐蔽通信系统中,由于非法检测用户所在位置的不确定性和信道状态的随机性,导致合法用户很难对发射功率和传输速率进行准确把控。为此,提出一种速率自适应的隐蔽通信设计方案。【方法】该方案在保证通信满足隐蔽约束条件的前提下,通过减少信道状态与传输速率不匹配情况发生,降低系统隐蔽中断概率。【结果】仿真分析结果表明,在一定隐蔽中断概率约束条件下,根据估计信道的状态来自适应匹配传输速率,将有助于降低隐蔽通信系统的中断概率。【结论】因此,速率自适应将有助于提高隐蔽通信系统的可通性。

[Purposes]In a full-duplex interference receiver covert communication system,it is difficult for the legitimate user to accurately control the transmit power and transmission rate due to the uncertain location of the illegal detection user and the randomness of the channel state.To this end,a rate adaptive covert communication design scheme is proposed.[Methods]The scheme reduces the covert outage probability of the system by reducing the occurrence of the mismatch between the channel state and transmission rate while ensuring that the communication satisfies the covert constraints.[Findings]Simulation analysis shows that the rate adaptive scheme based on the estimated channel state is helpful to reduce the transmission outage probability of the covert communication system under certain constraint of the covert outage probability.[Conclusions]Therefore,rate adaptive will be helpful to improve the connectivity of covert communication system.