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Chaotic sequences for multiple access

Chaotic sequences for multiple access

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The use of chaotic signals as generators of binary and multilevel sequences suitable for code division multiple access (CDMA) is proposed. The number of obtained sequences is found to be greater than the number of m-sequences of the same length. These new chaotic sequences are used as spreading codes in a CDMA system. Simulation results are presented and compared with those obtained for m-sequences in terms of BER performance.

Inspec keywords: code division multiple access; chaos; error statistics; codes; sequences

Other keywords: BER performance; binary sequences; multilevel sequences; CDMA system; spreading codes; chaotic signals; bit error rate; code division multiple access; chaotic sequences

Subjects: Information theory; Codes; Multiple access communication

References

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      • R.C. Hilborn . (1994) Chaos and nonlinear dynamics.
    2. 2)
      • M. Simon , J. Omura , R. Scholtz , B. Levitt . (1994) Spread spectrum communications handbook.
    3. 3)
      • K.M. Cuomo , A.V. Oppenheim , S.H. Strogatz . Synchronization of Lorenz-based chaotic circuits with applications tocommunications. IEEE Trans. Circuits Syst. II , 10 , 626 - 633
    4. 4)
      • Barda, A., Laufer, S.: `Chaotic signals for multiple access communications', Proc. Eighteenth Convention of Electrical and Electronics Engineersin Israel, March 1995.
    5. 5)
      • Schotten, H.D., Elders-Boll, H., Busboom, A.: `Multi-code CDMA with variable sequence-sets', 1997 IEEE 6th Int. Conf. Universal Personal Communications Record, 1997, p. 628–631.
    6. 6)
      • Heidari-Bateni, G., McGillen, C.D.: `Chaotic sequences for spread spectrum: An alternative to PN-sequences', 1992 IEEE ICSTWC, 1992, p. 437–440.
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