Multiuser Chaos Communication Through Polyphase Spreading for Overlay Cognitive Radio

Dan Sundersingh, Yao Ma, Vasu Chakarvarthy, Zhiqiang Wu

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

Abstract

Chaos communication systems have received strong interest due to its performance and security advantages such as robustness in multi-path fading environments, resistance to jamming, and low probability of interception. With recent advances in cognitive radio, it is highly desired to combine the security advantages of chaos communication with the flexibility of cognitive radio to create a chaos based cognitive radio communication system that improves the spectrum usage while maintaining high security features. In this paper, we propose a multi-user non-continuous orthogonal frequency division multiplexing (NC-OFDM) based chaotic communication system employing orthogonal polyphase spreading codes. Specifically, a polyphase spreading code called carrier interferometry code is layered onto the frequency domain chaotic waveform to create multi-user support. The proposed system not only maintains the capability of operating over multiple non-contiguous spectrum holes, but also offers security features by chaos sequence modulation. For comparison purposes, we develop two benchmark schemes using both NC-OFDM and chaos modulation. Simulation results show significant performance advantage of the proposed scheme than the benchmark schemes. Finally, we point out that the proposed scheme allows flexible access control for different users and groups, in broadcast, multicast and unicast services.

Original languageEnglish
Title of host publication2012 International Waveform Diversity & Design Conference (WDD)
PublisherIEEE
Pages197-202
Number of pages6
ISBN (Electronic)978-1-5090-0598-7
DOIs
StatePublished - 2012
EventInternational Waveform Diversity and Design Conference, WDD 2012 - Kauai, United States
Duration: Jan 22 2015Jan 27 2015

Conference

ConferenceInternational Waveform Diversity and Design Conference, WDD 2012
Country/TerritoryUnited States
CityKauai
Period1/22/151/27/15

ASJC Scopus Subject Areas

  • Signal Processing
  • Instrumentation
  • Computer Networks and Communications

Keywords

  • chaos modulation
  • Cognitive radio
  • NC-OFDM
  • Modulation
  • Chaotic communication
  • Benchmark testing
  • Peak to average power ratio

Disciplines

  • Electrical and Computer Engineering

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