Use of Cross-Correlation Minimization for Performance Enhancement of Chaotic Spreading Sequence Based Asynchronous DS-CDMA System

2016 IEEE 4th Workshop on Advances in Information, Electronic and Electrical Engineering (AIEEE 2016) 2017
Anna Litviņenko, Artūrs Āboltiņš

The research is devoted to the reduction of multiple access interference (MAI) in chaos-based asynchronous direct sequence code division multiple access (DS-CDMA) communication systems by use of spreading sequences which are selected from a large set of generated chaotic sequences. For the generation of binary chaotic spreading sequences different 1-dimensional maps are examined. As selection criteria the minimum magnitude of periodic cross correlation among all pairs of selected sequences is used. The impact of the sequence length, the generation method as well as the number of simultaneously used sequences on the selection criteria is studied. For the evaluation and analysis of selection efficiency a baseband MATLAB model of asynchronous DS-CDMA system with an additive white Gaussian noise (AWGN) channel and perfect chip synchronization is employed. Detailed measurements of bit error ratios (BERs) in systems with different numbers of simultaneous users are provided.

Keywords
Spreding sequences, chaos, correlation synchronization, wireless communications
DOI
10.1109/AIEEE.2016.7821812
Hyperlink
http://ieeexplore.ieee.org/document/7821812/

Litviņenko, A., Āboltiņš, A. Use of Cross-Correlation Minimization for Performance Enhancement of Chaotic Spreading Sequence Based Asynchronous DS-CDMA System. In: 2016 IEEE 4th Workshop on Advances in Information, Electronic and Electrical Engineering (AIEEE 2016), Lithuania, Vilnius, 10-12 November, 2016. Piscataway: IEEE, 2017, pp.60-65. ISBN 978-1-5090-4474-0. e-ISBN 978-1-5090-4473-3. Available from: doi:10.1109/AIEEE.2016.7821812

Publication language
English (en)