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Title: Performance enhancement of DS/CDMA system using chaotic complex spreading sequence
Authors: Kurian, A.P.
Puthusserypady, S. 
Htut, S.M.
Keywords: Chaotic dynamics
Direct sequence/spread spectrum (DS/SS)
Ikeda map (IM)
Multiple acess interference(MAI)
Issue Date: May-2005
Citation: Kurian, A.P., Puthusserypady, S., Htut, S.M. (2005-05). Performance enhancement of DS/CDMA system using chaotic complex spreading sequence. IEEE Transactions on Wireless Communications 4 (3) : 984-989. ScholarBank@NUS Repository.
Abstract: In this paper, a novel direct sequence/spread spectrum (DS/SS) communication system is proposed. This scheme exploits the two-dimensional complex valued chaotic Ikeda map as the spreading sequences. With this double spreading DS/SS system, the effect of multiple access interference can be mitigated by choosing the spreading sequences with appropriate cross-correlation properties. The performance of the system is assessed and demonstrated in a multiuser environment by means of computer simulation with additive white Gaussian noise, Rayleigh fading, and selective fading channel conditions. These studies reveal that the proposed system significantly outperforms the Gold code DS/SS-BPSK system in synchronous channel conditions. In asynchronous case, the improvement is substantial for low signal-to-noise ratios. © 2005 IEEE.
Source Title: IEEE Transactions on Wireless Communications
ISSN: 15361276
DOI: 10.1109/TWC.2005.847028
Appears in Collections:Staff Publications

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