Patent ID: 6064701
Filing Date: 2000-05-16
Classification: H04L

Abstract:
A system for communicating a message signal from a first location to a second location, said first and second locations being linked by a communication channel such that the signal is subject to disturbances such as noise, jamming, gain modulation, and multipath interference, the system being based on synchronization of dynamical systems and comprising:a transmitter dynamical system x'=f(x) generating signals x(t) with prescribed characteristics;an encoder for and combining an information signal s(t) with x(t) to produce an encoded signal c(t)=c(s(t),x(t));a transmitter perturbing unit which changes the dynamical system x'=f(x) according to c(t) into a system x'=g(f(x),c(t));a function transforming unit h which maps c(t) into a function u(t)=h(c(t));a transmitter for sending u(t) to a receiver;a receiver having a dynamical system x'=f(x) generating signals x which are similar to x(t);a receiver perturbing unit which changes the dynamical system x'=f(x) according to u(t) into x'=g(f(x),u(t)); anda decoder, d, which decodes the transmitted signal u(t) using x, wherein d(t)=d(u(t),x) such that d(t) approximates s(t), so the information in s(t) can be recovered from d(t).