短参倍速差分混沌键控系统  

Short reference multifold rate differential chaos shift keying

作　　者：张刚[1] 郝怡曼 张天骐[1] 

机构地区：[1]重庆邮电大学信号与信息处理重庆市重点实验室,重庆400065

出　　处：《系统工程与电子技术》2018年第1期184-190,共7页Systems Engineering and Electronics

基　　金：国家自然科学基金(61671095;61371164;61275099);重庆市教育委员会科研项目(KJ1600427;KJ1600429);信号与信息处理重庆市市级重点实验室建设项目(CSTC2009CA2003)资助课题

摘　　要：由于差分混沌键控(differential chaos shift keying system,DCSK)系统存在参考时隙不传输码元却和数据时隙消耗相同发射功率这一缺点,提出了一种短参倍速差分混沌键控系统(short reference multifold rate DCSK,SRMR-DCSK)。该系统将参考时隙长度缩短,同时数据时隙携带多比特码元。该方式降低了每比特发射功率,同时能有效改善系统的传输速率。采用高斯近似法推导了在加性高斯白噪声信道以及瑞利信道中的误码率性能并进行仿真实验。理论分析和仿真结果表明,在两种信道环境中理论误码率和仿真曲线很好地一致。同时,证明该系统具有较好的性能以及实用参考价值,在混沌通信领域具有很好的应用前景。To overcome the drawback of the differential chaos shift keying(DCSK)system,consume the same transmit power while do not transfer data,a short reference multifold rate differential chaos shift keying system is proposed.The system shortens the length of the reference time slot,and multibit data can be carried in the data time slot.This system reduces the transmitting power and improves the data transfer rate.The bit error rate performance over additive white Gaussian noise channel and Rayleigh channel using the Gaussian approximation method is derived and numerous simulation experiments are carried out.Theoretical analysis and simulation results show that simulations in both environments show a perfect match with the analytical expressions.It is proved that the system has good performance and practical reference value,and provides certain application prospect in the chaotic communication field.

关 键 词：差分混沌键控 短参倍速差分混沌键控 高速率 比特能量 

分 类 号：TN911.3[电子电信—通信与信息系统]