A cascaded synchronized nonlinear system includes a nonlinear transmitter having stable first and second subparts. The first subpart produces a first transmitter signal for driving the second subpart and the second subpart produces a second transmitter signal for driving the first subpart. The nonlinear...http://www.google.co.uk/patents/US5379346?utm_source=gb-gplus-sharePatent US5379346 - Cascading synchronized chaotic systems
