Design and Evaluation of Spreading Sequences with Negative Auto-correlation Based on Chaos Theory and M-Sequences
Akio Tsuneda, Kanako Kubo, Yasunori Miyazaki · ITC-CSCC :International Technical Conference on Circuits Systems, Computers and Communications · 2009
Spreading sequences with appropriate negative autocorrelation can reduce average multiple access interference (MAI) in asynchronous DS/CDMA systems compared with the conventional M-sequences and Gold Sequences generated by linear feedback shift registers (LFSRs). We design spreading sequences with negative autocorrelation based on M-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.