Hyperchaotic Secrete Communication Based on Wien-Bridge Circuit and its DSP Realization

Based on a typical chaotic Wien-bridge oscillator, we propose a novel hyperchaotic secrete communication approach by using the nonlinear ring coupling technique. In detail, we firstly construct a loop with signal, then encrypt the useful information and realize the hyperchaotic synchronization between sender and receiver, and finally demodulate the original signal at the end. By using digital processing technology, discreting state variable of continuous time equation without dimensionless and ratio transformation, we present the general design principles based on the DSP technology and some experimental results. Moreover, based on DSP platform, we propose a voice secrete communication method with very high practical value.