Permutation-based M-ary chaotic-sequence spread-spectrum communication systems

Kai Y. Cheong, Chung Ming Lau, Chi Kong Tse

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)


From the spectrum utilization point of view, an M-ary modulation scheme is sometimes preferred over a binary one because more data can be transmitted in the same bandwidth. In this paper, we propose an M-ary chaotic-sequence spread-spectrum modulation scheme. In this scheme, each block of chaotic sequence produced by a chaotic map undergoes a transformation before it is transmitted. At the receiver, based on the block of chaotic sequence received, the appropriate inverse transformation is performed, and the received symbol is decoded. A permutation-based transformation process is proposed, and a simple method to construct the permutations corresponding to different symbols is also presented. Coherent and noncoherent systems are investigated, and their performances are studied by computer simulations.
Original languageEnglish
Pages (from-to)567-577
Number of pages11
JournalCircuits, Systems, and Signal Processing
Issue number6
Publication statusPublished - 1 Jan 2003


  • Chaos-based communications
  • M-ary modulation
  • Permutation
  • Spread-spectrum communications

ASJC Scopus subject areas

  • Signal Processing
  • Applied Mathematics


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