In order to save the communication channel resource, the synchronization of two 5-scroll hyperchaotic attractors was realized using wavelet transform to remove the detailed information of the feedback variable so as to compress its frequency spectrum width. In the transmitter, the high frequency parts of variable z were filtered out through a wavelet filter, then the low frequency parts were reconstructed and sent to the receiver. In the receiver, this reconstructed signal was used as feedback signal and the synchronization was realized. Using this synchronous method, the system resource was saved, and because the transported signal was not a whole chaotic signal, the security performance of the system was improved.
