Covert communications based on signal overlay

Arnab Roy, John F. Doherty

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


A covert communication technique based on the principle of signal overlay is presented here. A weak narrow-band signal is added to the primary signal and shares the same frequency band. Covertness of the overlay signal is ensured by careful signal design. At the receiver a stationary filtering approach is ineffective in separating the signals. However, the recently introduced raised cosine empirical mode decomposition technique is ideally suited to separate these time-varying signals with overlapping frequency components. An application to commercial frequency modulation overlay is presented with associated analysis and empirical performance results.

Original languageEnglish (US)
Pages (from-to)295-311
Number of pages17
JournalAdvances in Adaptive Data Analysis
Issue number3
StatePublished - Jul 2010

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Computer Science Applications


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