A novel differential chaos shift keying system based on joint time slot and code index of carrier phase modulation

IF 2.9 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Digital Signal Processing Pub Date : 2024-10-05 DOI:10.1016/j.dsp.2024.104803

Lifang He , Xinyu Xiong , Chaofan Li

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Abstract

This paper proposes a novel differential chaos shift keying (DCSK) system that utilizes carrier phase modulation in combination with time slot and code index modulation, referred to as CP-TCIM-DCSK system, to achieve high data rate transmission. In the proposed CP-TCIM-DCSK system, the carrier modulated by the carrier phase is used to transmit the information-bearing signal. In addition to physically transmitted information bits, extra information bits are conveyed through time slot and Walsh code modulation, as well as carrier phase modulation, making full use of the benefits of multidimensional modulation. To successfully estimate carrier phase bits and code index bits, an effective joint detection algorithm for carrier phase and code index tailored for the CP-TCIM-DCSK system is introduced. The theoretical Bit Error Rate (BER) expressions for the CP-TCIM-DCSK scheme are derived for both Additive White Gaussian Noise (AWGN) and multipath Rayleigh fading channels. Furthermore, a comparison of data rates, energy efficiency, and complexity between the CP-TCIM-DCSK system and the most advanced systems in the same category at present is conducted. The results validate the accuracy of theoretical analysis through simulation and demonstrate that the proposed scheme outperforms its competitive systems in terms of BER performance.

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基于载波相位调制联合时隙和编码指数的新型差分混沌移调系统

本文提出了一种新型差分混沌移动键控（DCSK）系统，该系统利用载波相位调制与时隙和编码索引调制相结合，实现了高数据传输速率，被称为 CP-TCIM-DCSK 系统。在拟议的 CP-TCIM-DCSK 系统中，使用载波相位调制的载波来传输信息信号。除了物理传输的信息比特外，还通过时隙和沃尔什编码调制以及载波相位调制来传输额外的信息比特，从而充分利用了多维调制的优势。为了成功估计载波相位比特和编码索引比特，介绍了一种为 CP-TCIM-DCSK 系统量身定制的有效载波相位和编码索引联合检测算法。针对加性白高斯噪声（AWGN）和多径瑞利衰落信道，得出了 CP-TCIM-DCSK 方案的理论误码率（BER）表达式。此外，还对 CP-TCIM-DCSK 系统与目前同类最先进系统的数据传输率、能效和复杂性进行了比较。结果通过仿真验证了理论分析的准确性，并证明所提出的方案在误码率性能方面优于同类系统。

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来源期刊

Digital Signal Processing 工程技术-工程：电子与电气

CiteScore

5.30

自引率

17.20%

发文量

435

审稿时长

66 days

期刊介绍： Digital Signal Processing: A Review Journal is one of the oldest and most established journals in the field of signal processing yet it aims to be the most innovative. The Journal invites top quality research articles at the frontiers of research in all aspects of signal processing. Our objective is to provide a platform for the publication of ground-breaking research in signal processing with both academic and industrial appeal. The journal has a special emphasis on statistical signal processing methodology such as Bayesian signal processing, and encourages articles on emerging applications of signal processing such as: • big data• machine learning• internet of things• information security• systems biology and computational biology,• financial time series analysis,• autonomous vehicles,• quantum computing,• neuromorphic engineering,• human-computer interaction and intelligent user interfaces,• environmental signal processing,• geophysical signal processing including seismic signal processing,• chemioinformatics and bioinformatics,• audio, visual and performance arts,• disaster management and prevention,• renewable energy,