Binary Spreading Sequences with Negative Auto-Correlation Based on Chaos Theory and Gold Sequences for Application to Asynchronous DS/CDMA Communications

Akio TSUNEDA; Yasunori MIYAZAKI

doi:10.1587/transfun.E93.A.2307

Special Section on Signal Design and its Application in Communications

Binary Spreading Sequences with Negative Auto-Correlation Based on Chaos Theory and Gold Sequences for Application to Asynchronous DS/CDMA Communications

Akio TSUNEDA, Yasunori MIYAZAKI

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Keywords: asynchronous DS/CDMA, negative auto-correlation, gold sequence, chaos theory

JOURNAL RESTRICTED ACCESS

2010 Volume E93.A Issue 11 Pages 2307-2311

DOI https://doi.org/10.1587/transfun.E93.A.2307

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Abstract

Spreading sequences with appropriate negative auto-correlation can reduce average multiple access interference (MAI) in asynchronous DS/CDMA systems compared with the conventional Gold Sequences generated by linear feedback shift registers (LFSRs). We design spreading sequences with negative auto-correlation based on Gold sequences and the chaos theory for the Bernoulli map. By computer simulations, we evaluate BER performances of asynchronous DS/CDMA systems using the proposed sequences.

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