The chaotic signals are described as random-like; change its behavior with the initial condition. It's non-periodic and due to wide band property the signal is suitable for the spread spectrum modulation. A number of chaos based modulation has been mentioned [1]. Without the need for channel estimation and chaotic synchronization, non-coherent chaos-based schemes have attached to a lot of attention.The differential chaos shift keying (DCSK) system is considered as a kind of noncoherent systems [2]. In DCSK system, the information and the reference bearing signals are separated by time slots and translated in the same channel. The main drawback of DCSK systems is the receiver requires a radio frequency (RF) delay line, which is not simple to integrate in complementary metal-oxide-semiconductor (CMOS) technology.
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