Summary
International Symposium on Nonlinear Theory and its Applications
2010
Session Number:B3L-C
Session:
Number:B3L-C3
Spreading Sequences with Negative Auto-correlation Based on Chaos Theory and Gold Sequences ?Increase of Family Sizes and Performance Evaluation?
Akio Tsuneda, Taizo Sagara,
pp.422-425
Publication Date:2010/9/5
Online ISSN:2188-5079
Summary:
Spreading sequences with appropriate negative auto-correlation can reduce average multiple access interference (MAI) in asynchronous DS/CDMA systems compared with the conventional spreading sequences such as 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. The family size of the proposed sequences is 6 times as large as that of the original Gold sequences. By computer simulations, we evaluate BER performances of asynchronous DS/CDMA systems using the proposed sequences.