Statistical characterization of pseudorandom sequences used in spread spectrum communication scheme

L. DE MICCO; C.M. ARIZMENDI; H. A. LARRONDO

Bento Goncalves, Brasil

Conferencia; Second Latin American School and Conference in Statistical Physics and Interdisciplinary Applications (LASSPIA); 2007

ICTP-CNPQ-UFRGS

Since the introduction of chaos synchronization the application of chaos to practical communication systems has attracted attention. The performance of asynchronous direct-sequence spread-spectrum(DS/SS) communication systems, using chaotic sequences as spectral spreading sequences is analyzed. Among the advantages of chaotic sequences the big number of them, the ease of their generation, as well as their inherent improvement in transmission security. Sequences obtained by replication of a truncated and quantized chaotic time series are compared with classical pseudo noise (PN) and orthogonal sequences, such as gold codes, m-sequences, kasami codes, walsh codes, etc. The tools used for the analysis are the auto-correlation function, the cross-correlation function and the sequences spectrum. The sequences complexity measured with zippers is studied as a global performance index.