A multiple access scheme for chaos-based digital communication systems utilizing transmitted reference

Wai M. Tam, Chung Ming Lau, Chi Kong Tse

Research output: Journal article publicationJournal articleAcademic researchpeer-review

40 Citations (Scopus)


In this paper, a multiple access (MA) technique is proposed for chaos-based communication systems, in which chaotic reference signals are transmitted followed by the information-bearing signals. Chaotic reference signals modulated by a binary training sequence are sent periodically. The same chaotic signals are then modulated by the binary data and transmitted. To achieve MA, different chaotic signals and training sequences are assigned to different users. Two types of receivers are proposed. For the first one, an adaptive filter is employed which aims to reduce the inter-user interference. For the second receiver type, a simple inverse-and-average method is used in an attempt to recover the chaotic reference signal, which is then used to correlate with the information-bearing signals for determining the received symbols. The performance bounds of these two schemes are also derived. Finally, the bit error rates of the proposed system are simulated and compared.
Original languageEnglish
Pages (from-to)1868-1878
Number of pages11
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
Issue number9
Publication statusPublished - 1 Sep 2004

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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