In the recent years, many new communication systems have been based on chaos theory. Chaotic systems have been widely used to design analog and digital systems that are used to improve security level or to achieve spread spectrum systems in communication networks. In this paper we present some aspects regarding the implementation of digital chaotic maps that are used to achieve dynamical chaotic system. We present the case of using field programmable logic areas to implement chaotic generators based on well-known digital chaotic maps that are used for designed the communication networks using dynamical systems. We show that is a major difference between the values obtained using Matlab and a FPGA simulator. We discuss also about the problems regarding the degradation of digital chaotic maps that are still present in real digital implementation using digital processors not only in the simulation.

Keywords: Communications, Dynamical chaotic systems, Logistic map, Field programmable gate array (FPGA).