Performance of Chaos-Based Communication Systems under the Influence of Coexisting Conventional Spread-Spectrum Systems

Chung Ming Lau, Chi Kong Tse

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)


This brief studies the performance of selected chaos-based systems which share their frequency bands with conventional spread-spectrum systems. Such a scenario may occur in normal practice when chaos-based systems are introduced while the conventional systems are still in operation. The particular chaos-based systems under study are the coherent chaos-shift-keying system and the noncoherent differential chaos-shift-keying system, and the coexisting conventional system employs the standard direct-sequence spread-spectrum modulation scheme. Analytical expressions for the bit-error rates are derived in terms of system parameters such as spreading factor, chaotic signal power, conventional spread-spectrum signal power, and noise power spectral density. Finally, computer simulations are performed to verify the analytical findings.
Original languageEnglish
Pages (from-to)1475-1481
Number of pages7
JournalIEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications
Issue number11
Publication statusPublished - 1 Nov 2003


  • Chaos communication
  • Chaos shift keying (CSK)
  • Coexistence
  • Differential chaos shift keying (DCSK)
  • Differential sequence spread spectrum

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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