Design and analysis of a novel differential chaos shift keying system with joint three-dimensional index modulation

IF 5.3 1区数学 Q1 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Chaos Solitons & Fractals Pub Date : 2024-10-10 DOI:10.1016/j.chaos.2024.115609

Lifang He , Xinyu Xiong , Yongqi Guo

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Abstract

This paper proposes a joint three-dimensional index modulation differential chaos shift keying system, referred to as JTDIM-DCSK. To meet the demands of high-speed communication, this system employs k-combination mapping at the transmitter to achieve three-dimensional index modulation of carriers, time slots, and Walsh codes. This significantly increases the number of implicitly transmitted bits and allows for the transmission of multiple physical modulation bits within a single selected time slot. Additionally, the receiver uses two noise reduction modules for the reference signal and Walsh code index detection signal, effectively reducing noise interference and improving bit error rate (BER) performance. The theoretical BER of the JTDIM-DCSK system is derived under additive white Gaussian noise (AWGN) and multipath Rayleigh fading channels, confirming its accuracy. Furthermore, the paper conducts a comparative analysis of the proposed system with other structurally similar systems in terms of data rate, spectral efficiency, complexity, and BER. The results highlight the overall superior performance of the JTDIM-DCSK system, providing strong support for achieving high-quality wireless communication.

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新型差分混沌移调键控系统与三维指数联合调制的设计与分析

本文提出了一种联合三维索引调制差分混沌移动键控系统，简称为 JTDIM-DCSK。为满足高速通信的需求，该系统在发射器采用 k 组合映射，实现载波、时隙和沃尔什码的三维索引调制。这大大增加了隐式传输比特的数量，并允许在一个选定的时隙内传输多个物理调制比特。此外，接收器还对参考信号和沃尔什编码索引检测信号使用了两个降噪模块，从而有效地减少了噪声干扰，提高了误码率（BER）性能。在加性白高斯噪声（AWGN）和多径瑞利衰落信道下，推导出了 JTDIM-DCSK 系统的理论误码率，证实了其准确性。此外，论文还从数据率、频谱效率、复杂性和误码率等方面对所提系统与其他结构类似的系统进行了比较分析。结果凸显了 JTDIM-DCSK 系统的整体优越性能，为实现高质量无线通信提供了有力支持。

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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.