Faster than Nyquist interference assisted secret communication for OFDM systems

Arsenia Chorti, H. Vincent Poor

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Scopus citations

Abstract

Physical layer security techniques have emerged as promising candidates in order to achieve perfect secrecy in wireless communication systems. In this framework, an approach is proposed to enhance secrecy, taking advantage of topological and mobility asymmetries between a legitimate user and potential eavesdroppers. As a specific example, an Alamouti Orthogonal Frequency Division Multiplexing (OFDM) system with distributed mobile transmitters is investigated for underwater acoustic and radio frequency applications. The mobile transmitters independently emit pre-equalized - in terms of Doppler shifts - Alamouti OFDM symbols. As a result, the legitimate receiver effortlessly receives Doppler shift free copies of the OFDM symbols with standard diversity gains. On the contrary, eavesdroppers experience diversity gain compression and cross-symbol interference. A positive ergodic secrecy capacity is achievable even in the absence of an SNR advantage at the legitimate user.

Original languageEnglish (US)
Title of host publicationConference Record of the 45th Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2011
Pages183-187
Number of pages5
DOIs
StatePublished - Dec 1 2011
Event45th Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2011 - Pacific Grove, CA, United States
Duration: Nov 6 2011Nov 9 2011

Publication series

NameConference Record - Asilomar Conference on Signals, Systems and Computers
ISSN (Print)1058-6393

Other

Other45th Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2011
CountryUnited States
CityPacific Grove, CA
Period11/6/1111/9/11

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Computer Networks and Communications

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  • Cite this

    Chorti, A., & Poor, H. V. (2011). Faster than Nyquist interference assisted secret communication for OFDM systems. In Conference Record of the 45th Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2011 (pp. 183-187). [6189981] (Conference Record - Asilomar Conference on Signals, Systems and Computers). https://doi.org/10.1109/ACSSC.2011.6189981