Abstract:

Based on the theorem of synchronization of digital-flow chaos in secure communications, a scheme of secure speech communication was presented and realized, a method using model references was given to solve the problem that noise will be increased with time going because of programming variance both communication sides. Reducing synchronic noise and promoting the ratio of signal power and noise power are made with the method. The experimental results show it will reduce noise efficiently.

Key words: synchronization noise, model reference, reducing noise