Technical Program

Paper Detail

Paper Title Codes for Covert Communication over Additive White Gaussian Noise Channels
Paper IdentifierTU2.R8.1
Authors Ishaque Ashar Kadampot, Mehrdad Tahmasbi, Matthieu R. Bloch, Georgia Institute of Technology, United States
Session Covert Communication
Location Conseil, Level 5
Session Time Tuesday, 09 July, 11:40 - 13:00
Presentation Time Tuesday, 09 July, 11:40 - 12:00
Manuscript  Click here to download the manuscript
Abstract We propose a coding scheme for covert communication over additive white Gaussian noise channels, which extends a previous construction for discrete memoryless channels. We first show how sparse signaling with On-Off keying fails to achieve the covert capacity but that a modification allowing the use of binary phase-shift keying for "on'' symbols recovers the loss. We then construct a modified pulse-position modulation scheme that, combined with multilevel coding, can achieve the covert capacity with low-complexity error-control codes. The main contribution of this work is to reconcile the tension between diffuse and sparse signaling suggested by earlier information-theoretic results.