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To solve the peak-to-average power ratio (PAPR) problem of the artificial noise (AN) aided secure communication system, we propose a PAPR reduction algorithm based on the rotation invariant of AN subspaces in this paper. High peaks of the transmit signal caused by in-phase superposition between information subspace and AN subspaces is cancelled by rotating AN subspaces appropriately. Furthermore,...
According to the principle of phase space reconstructing by the scale and its differential of a continuous time chaotic system, the synchronization of Lorenz system is investigated by employing chaos observer synchronization method. A theorem about chaos observer synchronization of Lorenz chaotic system is put forward based on the stability rule. Appling this method into secure communication, a new...
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