Spatiotemporal-Chaotic Sequences for Asynchronous DS-UWB Communication System

In previous works, the performance of DS-UWB (Direct SequenceUltra Wide Band) systems in a multiuser scenario with binary pulse amplitude modulation has been studied. In most of these works, tradional spread spectrum sequences such as independent identically distributed (i.i.d) random sequences and Gold sequences have been considered. Since these sequences are limited in term of correlation properties several researchers were interested in using chaotic sequences generated by non linear systems. In this paper, we propose to use spatiotemporal chaotic codes in asynchronous DS-UWB systems and investigate an analysis of Multi-User Interference (MUI) term for this family and the two classical i.i.d and Gold families. Then, the Bit Error Rate (BER) is computed to evaluate the performance of conventional receiver in both cases AWGN and multipath channel to confirm the results found about MUI.