Multichannel communication using an infinite dimensional spatiotemporal chaotic system

Chaotic spatiotemporal dynamics generated by a nonlinear set of coupled par tial differential equations are synchronized via a scalar complex variable. Our results show that synchronization is robust to noise, and we demonstra te chaotic communication in a high-dimensional system. We have also discove red that the added dimensionality creates a new quasisynchronous stat, enab ling the transmission of multiple messages through a single scalar complex channel. The feasibility of these novel ideas is demonstrated on a realisti c numerical model of chaotic semiconductor lasers. [S1050-2947(99)05503-1].