基于联合对偶正交码和时频指数调制的去噪增强差分混沌移位键控

IF 5.3 1区数学 Q1 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS

Chaos Solitons & Fractals Pub Date : 2025-04-27 DOI:10.1016/j.chaos.2025.116475

Gang Zhang , Yanan Hu , Xibiao Chen , Yunhan Pei

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引用次数: 0

摘要

我们提出了一种联合双正交码、时隙和载波指数调制的差分混沌移位键控（JDOCTF-IM-DCSK）系统，以提高数据速率和能源效率。在该系统中，索引位被映射到时隙、载波和正交码的不同状态，利用第一个时隙和其余时隙的信号差异，在不增加额外时频资源的情况下传输参考信号。在接收端，采用三级降噪方法降低噪声干扰，并提出了两种有效恢复JDOCTF-IM-DCSK系统索引位和调制位的算法。在加性高斯白噪声（AWGN）和多径瑞利衰落信道下，推导了JDOCTF-IM-DCSK系统的理论误码率（BER），并对其精度进行了验证。此外，本研究还将系统的数据速率、频谱效率、能量效率、复杂性和误码率与其他类似系统进行了比较，突出了JDOCTF-IM-DCSK系统的整体性能优势。

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Denoising-enhanced differential chaos shift keying with joint dual orthogonal codes and time-frequency index modulation

We propose a joint dual orthogonal code, time slot, and carrier index modulation differential chaos shift keying (JDOCTF-IM-DCSK) system to enhance data rate and energy efficiency. In this system, index bits are mapped to different states of time slots, carriers, and orthogonal codes, enabling the transmission of reference signal without additional time-frequency resources by leveraging the differences between the signal in the first time slot and the remaining time slots. At the receiver, three-stages of denoising are applied to reduce noise interference, and two algorithms are proposed to effectively recover the index and modulated bits of the JDOCTF-IM-DCSK system. Under Additive White Gaussian Noise (AWGN) and multipath Rayleigh fading channels, the theoretical bit error rate (BER) of the JDOCTF-IM-DCSK system is derived and its accuracy is validated. Furthermore, this study compares the system's data rate, spectral efficiency, energy efficiency, complexity, and BER with other similar systems, highlighting the overall superior performance of the JDOCTF-IM-DCSK system.

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来源期刊

Chaos Solitons & Fractals 物理-数学跨学科应用

CiteScore

13.20

自引率

10.30%

发文量

1087

审稿时长

9 months

期刊介绍： Chaos, Solitons & Fractals strives to establish itself as a premier journal in the interdisciplinary realm of Nonlinear Science, Non-equilibrium, and Complex Phenomena. It welcomes submissions covering a broad spectrum of topics within this field, including dynamics, non-equilibrium processes in physics, chemistry, and geophysics, complex matter and networks, mathematical models, computational biology, applications to quantum and mesoscopic phenomena, fluctuations and random processes, self-organization, and social phenomena.