In this letter, we analyze the performance of covert communications under faster-than-Nyquist (FTN) signaling in the Rayleigh block fading channel. Both Bayesian criterion- and Kullback-Leibler (KL) divergence-based covertness constraints are considered. Especially, for KL divergence-based one, we prove that both the maximum transmit power and covert rate under FTN signaling are higher than those under Nyquist signaling. Numerical results coincide with our analysis and validate the advantages of FTN signaling to realize covert data transmission.
翻译:在本信里,我们分析了在雷利区块消失通道内以快于Nyquist(FTN)信号进行的秘密通信的性能。巴伊西亚标准-和库尔贝克-利贝尔(KL)基于差异的隐蔽性限制都得到了考虑。特别是对于基于差异的KL,我们证明FTN信号的最大传输功率和隐蔽率都高于Nyquist信号。数字结果与我们的分析相吻合,并验证了FTN信号对于实现隐蔽数据传输的优势。