Driving Signals Induced Synchronization

The aim of the present work is to generalize the method introduced by Güémez et al. Phys. Rev. E52 (1995) R2145 Using feedback scheme, two systems can be synchronized by signals or variables which come from the driving system. Furthermore, it is possible for the systems to be synchronized by different driving signals which come from the third or fourth system. So the unmasking procedure becomes more difficult. Numerical simulations are given.