New trends in wireless multimedia communications based on chaos and fractals

The aim of this paper is to emphasize on the many possible applications of chaos and fractals in wireless multimedia communication systems and to describe the nature and properties of chaotic and fractal signals which make them suitable for solving many of the limitations of wireless channels. Among the considered applications are: (i) the use of fractals in the design of wideband and multiband antennas; (ii) the design of chaotic and fractal spreading codes for spread spectrum and CDMA systems to result in improved performance, increase the capacity and provide more security to the system; (iii) chaotic modulation techniques which provide improved performance in interference environments as well as improved security features; (iv) chaos cryptosystems; (v) fractal modulation techniques which allow multirate transmission and increased reliability; (vi) fractal based compression and watermarking techniques.