Communicating with use of filtered, synchronized, chaotic signals

The principles of synchronization of chaotic systems are extended to the case where the drive signal is filtered. A feedback loop in the response system with an identical filter is used to reconstruct the original drive signal, allowing synchronization. A simple parameter switching scheme is used to send information from a drive circuit to a receiver. It is also possible to add a chaotic signal with very similar frequency characteristics and still detect information encoded in the original chaotic carrier (but not the added chaotic signal), demonstrating the possibility of adding and separating multiple chaotic carriers with similar frequency characteristics