A new receiver design of CDSK-based chaos communication system

Chaos communication system has characteristics such as non-periodic, non-predictability, broadband signal and easy implementation. Also, chaos communication system has a sensitive characteristic to initial conditions. Due to these characteristics, security of chaos communication system is generally evaluated that it is better than other digital systems. On the other hand, BER(Bit Error Rate) performance is worse than other digital systems. So, studies to improve the BER performance of the chaos communication system are performed continuously. In this paper, We propose a new CDSK(Correlation Delay Shift Keying) receiver for BER performance improvement. And, BER performance of proposed CDSK receiver evaluate. Also, when using the new CDSK receiver, we evaluate the BER performance according to the spreading factor and find an optimum spreading factor. If chaos communication system uses a new CDSK receiver, BER performance is improved than existing CDSK receiver. Also, if value of spreading factor is increased, BER performance is improved, because it is not nearly affected by interference signal and noise.