  Secure communication using hyperchaos has a better potential performance, but
hyperchaotic impulse circuits synchronization is a challenging task. In this
paper, an impulse control method is proposed for the synchronization of two
hyperchaotic Chen circuits. The sufficient conditions for the synchronization
of hyperchaotic systems using the impulse control are given. The upper bound of
the impulse interval is derived to assure the synchronization error system to
be asymptotically stable. Simulation and circuit experiment show the
correctness of the analysis and feasibility of the proposed method.
