摘要
在现有的非相干混沌通信系统中,用于传输参考信号的比特能量无法在接收端相关器被恢复出来,因此能量效率不高。针对这一问题,利用混沌序列前、后交换得到的新序列与原序列近似正交的特性,将参考信号与信息调制信号叠加在同一时隙传输,设计了一种置换相关键控混沌通信系统。在加性高斯白噪声信道中,该系统能从接收端相关器恢复全部的发送比特能量,具有比同类方案更高的能量效率。对误码率公式做了理论推导,对噪声性能进行了仿真实验,结果表明,与现有同类非相干混沌通信方案相比该方案具有更低的误码率。
In the existing non-coherent chaotic communication systems,the bit energy used to transmit the reference signal can t be recovered by the correlator of the receiver.To address this issue,a permutation correlated shift keying scheme is designed.A chaotic sequence obtained by exchanging its first and second half is approximately orthogonal to the original sequence.By exploring this feature,the proposed scheme transmits the reference signal and the information bearing signal in the same time slot.In additive white Gaussian noise(AWGN)channel,all the bit energy transmitted can be recovered by the receiver correlator.Therefore,the energy efficiency of this scheme is higher than that of other similar schemes.The theoretical bit error rate(BER)is analytically derived and the noise performance is numerically simulated.The experimental results show that the BER of the proposed scheme is lower than that of the existing similar non-coherent chaotic communication schemes.
作者
陈越
陈果
CHEN Yue;CHEN Guo(School of Robotics,The Open University of Guangdong,Guangzhou 510091,China;Faculty of Information Technology,Macao University of Science and Technology,Macao 999078,China)
出处
《电讯技术》
北大核心
2021年第12期1490-1495,共6页
Telecommunication Engineering
基金
广东省普通高校重点科研平台和科研项目(2018KTSCX344)
广东开放大学校级科研项目(RC1922)。
关键词
混沌通信
差分混沌键控
置换相关键控
能量效率
chaotic communication
differential chaos shift keying
permutation correlated shift keying
energy efficiency
