摘要
为解决传统差分混沌移位键控(differential chaotic shift keying,DCSK)系统安全性较差及误码性能受限的问题,提出一种结合脉冲位置调制与动态帧变换技术的DCSK(frame-transform DCSK system based on pulse position modulation,FT-PPM-DCSK)系统,实现安全性与误码性能的协同优化。通过推导系统在加性高斯白噪声(additive white Gaussian noise,AWGN)信道下的误比特率(BER)表达式,基于蒙特卡洛仿真验证其性能。实验结果表明,与基准DCSK系统相比,FT-PPM-DCSK系统提高了误码性能且具有更高的安全性。
To solve the problems of poor security and limited bit error performance of traditional differential chaotic shift keying system(DCSK),a differential chaotic shift keying system combi-ning pulse position modulation and dynamic frame transform technology(FT-PPM-DCSK)is pro-posed.Based on the hybrid modulation strategy of frame transformation,the system uses pulse posi-tion modulation(PPM)to modulate part of the information bits to achieve the collaborative optimi-zation of security and bit error performance.The bit error rate(BER)expression of the system in additive white Gaussian noise(AWGN)channel is derived,and its performance is verified by Monte Carlo simulation.The experimental results show that,compared with the benchmark DCSK system,the FT-PPM-DCSK system improves the BER performance and has higher security.
作者
隋涛
韩佳依
杜智豪
于其豪
SUI Tao;HAN Jiayi;DU Zhihao;YU Qihao(Shenyang Ligong University,Shenyang 110159,China)
出处
《沈阳理工大学学报》
2025年第5期37-43,58,共8页
Journal of Shenyang Ligong University
基金
辽宁省教育厅高等学校基本科研项目(JYTMS20230199)。
关键词
差分混沌移位键控
脉冲位置调制
帧变换
误码性能
differential chaotic shift keying
pulse position modulation
frame transform
bit error rate performance
