Title :
Performance evaluation of LFSR-based spreading sequences with negative auto-correlation designed by Chaos theory of modulo-2 added sequences
Author :
Tsuneda, Akio ; Miyazaki, Yasunori
Author_Institution :
Dept. of Comput. Sci. & Electr. Eng., Kumamoto Univ., Kumamoto, Japan
Abstract :
In asynchronous DS/CDMA systems, spreading sequences with appropriate negative auto-correlation properties can outperform conventional LFSR (linear feedback shift register) sequences with respect to bit error rate (BER) performance. Spreading sequences with negative auto-correlations can be generated by using one-dimensional chaotic maps but their hardware cost is more expensive than LFSRs. In this paper, we design spreading sequences with negative auto-correlation to be generated by LFSRs, which is based on the chaos theory for the Bernoulli chaotic map and modulo-2 added binary sequences. By computer simulations, we evaluate BER performances of asynchronous DS/CDMA communication systems using the proposed sequences.
Keywords :
binary sequences; chaotic communication; code division multiple access; correlation methods; error statistics; spread spectrum communication; BER performances; Bernoulli chaotic map; LFSR-based spreading sequences; asynchronous DS-CDMA systems; chaos theory; linear feedback shift register; modulo-2 added binary sequences; negative autocorrelation design; Autocorrelation; Binary sequences; Bit error rate; Chaos; Chaotic communication; Computer simulation; Costs; Hardware; Linear feedback shift registers; Multiaccess communication;
Conference_Titel :
Circuit Theory and Design, 2009. ECCTD 2009. European Conference on
Conference_Location :
Antalya
Print_ISBN :
978-1-4244-3896-9
Electronic_ISBN :
978-1-4244-3896-9
DOI :
10.1109/ECCTD.2009.5274956
