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Differential Chaos Shift Keying (DCSK) employs noncoherent demodulation technology and it's unnecessary for the receiver to generate synchronous chaotic signals at the receiving end. The structure of DCSK is simple and has good anti-noise performance. However, the security performance of DCSK is not enough, and it is easier to be cracked. For the above problems, a novel QAM-DCSK system was proposed...
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