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Shannon capacities of chaos-based and conventional asynchronous DS-CDMA systems over AWGN channels

Shannon capacities of chaos-based and conventional asynchronous DS-CDMA systems over AWGN channels

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© IEE
Published

The theoretical limits of asynchronous DS-CDMA systems over AWGN channels are investigated by computing the statistics of the associated Shannon capacity. A comparison is reported between chaos-based spreading and ideal random spreading Gold codes and maximum-length codes. It is shown that chaos-based spreading results in a nonnegligible increase of the capacity.

Inspec keywords: channel capacity; code division multiple access; AWGN channels; spread spectrum communication; chaos; random codes

Other keywords: chaos-based spreading codes; ideal random spreading Gold codes; AWGN channels; Shannon capacity; asynchronous DS-CDMA systems; maximum-length codes

Subjects: Information theory; Multiple access communication; Radio links and equipment

References

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      • Kennedy, M.P., Rovatti, R., Setti, G.: `Chaotic electronics in telecommunications', CRC Press, Boca Raton, Florida, June 2000.
    2. 2)
      • R. Rovatti , G. Mazzini , G. Setti . Enhanced rake receivers for chaos-based DS-CDMA. IEEE Trans. Circ. Sys. I , 818 - 829
    3. 3)
      • S. Verdù . The capacity region of the symbol-asynchronous Gaussian multiple access channel. IEEE Transactions on Information Theory , 733 - 751
    4. 4)
      • G. Mazzini , R. Rovatti , G. Setti . Interference minimization by auto-correlation shaping in asynchronous DS-CDMA systems: chaos-based spreading is nearly optimal. IEE Electron. Lett. , 1054 - 1055
    5. 5)
      • T. Kohda , H. Fujisaki . Variances of multiple access interference code averageagainst data average. Electron. Lett. , 1717 - 1719
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