Design of reverse-DCSK for chaos based communication system
Design of reverse-DCSK for chaos based communication system
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DOI：
10.1109/compcomm.2017.8322642
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发表时间：
2017-12
期刊：
影响因子：
--
通讯作者：
Weijiao Ma;Juan Du;Han-wen Xue
中科院分区：
文献类型：
--
作者：
Weijiao Ma;Juan Du;Han-wen Xue
提出了一种低成本、高可靠性、高数据速率的反向差分混沌键控（RE-DCSK）系统。RE-DCSK与传统DCSK一样，在第一个时隙发送参考信号，在第二个时隙进行了改进设计，通过时间反转单元增强混沌信号的自相关性，将两个正交信号之和作为信息承载信号。在不增加系统复杂度的情况下，与DCSK相比，该系统可以实现双倍的传输速率，并提高了通信安全性。为了验证该方法的有效性，分析了瑞利衰落信道和加性白色高斯噪声（AWGN）信道下的理论误比特率（BER）表达式。在AWGN信道下，该系统的误码率性能优于DCSK和相关延迟键控（CDSK）系统。
In this paper, a reverse differential chaos shift keying (RE-DCSK) system is proposed for reliable and high data rate non-coherent chaotic communication with low cost. RE-DCSK sends reference signals in the first time slots as in the conventional DCSK, and makes an improved design in the second time slot, where the time reverse unit strengthens the autocorrelation of chaotic signal and the sum of two orthogonal signals serves as information bearing signal. Without any extra cost of complexity, the proposed system allows double transmission rate and improves communication security as well in comparison with DCSK. To verify the effectiveness, the theoretical bit error rate (BER) expression is analyzed over Rayleigh fading channel and additive white Gaussian noise (AWGN) channel. The BER performance of the proposed system outperforms that of DCSK and correlation delay shift keying (CDSK) systems over AWGN channel.