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Electrical, Control and Communication Engineering

The Journal of Riga Technical University

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Computationally Efficient Chaotic Spreading Sequence Selection for Asynchronous DS-CDMA

Anna Litviņenko / Artūrs Āboltiņš
Published Online: 2017-12-29 | DOI: https://doi.org/10.1515/ecce-2017-0011


The choice of the spreading sequence for asynchronous direct-sequence code-division multiple-access (DS-CDMA) systems plays a crucial role for the mitigation of multiple-access interference. Considering the rich dynamics of chaotic sequences, their use for spreading allows overcoming the limitations of the classical spreading sequences. However, to ensure low cross-correlation between the sequences, careful selection must be performed. This paper presents a novel exhaustive search algorithm, which allows finding sets of chaotic spreading sequences of required length with a particularly low mutual cross-correlation. The efficiency of the search is verified by simulations, which show a significant advantage compared to non-selected chaotic sequences. Moreover, the impact of sequence length on the efficiency of the selection is studied.

Keywords: Baseband; Binary sequences; Chaotic communication; Communication systems; Direct-sequence code-division multiple access; Minimization; Wireless sensor networks


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About the article

Published Online: 2017-12-29

Published in Print: 2017-12-01

Citation Information: Electrical, Control and Communication Engineering, Volume 13, Issue 1, Pages 75–80, ISSN (Online) 2255-9159, DOI: https://doi.org/10.1515/ecce-2017-0011.

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© 2017 Anna Litviņenko et al., published by De Gruyter Open. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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