Multilevel-Coded Pulse-Position Modulation for Covert Communications

We develop a low-complexity coding scheme to achieve covert communications over binary symmetric channels. We circumvent the impossibility of covert communication with linear codes by introducing non-linearity through the use of pulse-position modulation (PPM) and multilevel coding (MLC). We show th...

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Bibliographic Details
Main Authors: Kadampot, Ishaque Ashar, Tahmasbi, Mehrdad, Bloch, Matthieu R.
Format: Conference Proceeding
Language:English
Online Access:Request full text
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Summary:We develop a low-complexity coding scheme to achieve covert communications over binary symmetric channels. We circumvent the impossibility of covert communication with linear codes by introducing non-linearity through the use of pulse-position modulation (PPM) and multilevel coding (MLC). We show that the MLC-PPM scheme exhibits many appealing properties, in particular, the channel at a given index level remains the same as the number of level increases, which allows one to use families of capacity- and resolvability-achieving codes to concretely instantiate the covert communication scheme.
ISSN:2157-8117
DOI:10.1109/ISIT.2018.8437587