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.
- Pub Date:
- October 2021
- Computer Science - Information Theory
- We have corrected the typos and inappropriate description throughout the paper as reviewers suggested. We have proved the superiority of FTN signaling on covert communications with the same detection time duration at Willie in Theorem 3 and renewed the simulation results in Section V as Reviewer 2 suggested. This paper has been resubmitted to IEEE Communications Letters on 14-Jan-2022