A novel carrier index M-ary differential chaos shift keying modulation scheme

被引：1
作者：
Sun, Yu-Xuan [1 ]
Meng, Zhu [1 ]
Yang, Hua [1 ]
Jiang, Guo-Ping [2 ,3 ]
机构：
[1] Nanjing Univ Posts & Telecommun, Coll Elect & Opt Engn, Coll Flexible Elect Future Technol, Nanjing 210023, Peoples R China
[2] Nanjing Univ Posts & Telecommun, Coll Automat, Nanjing, Peoples R China
[3] Nanjing Univ Posts & Telecommun, Coll Artificial Intelligence, Nanjing, Peoples R China
来源：
IET COMMUNICATIONS | 2024年 / 18卷 / 19期
基金：
中国国家自然科学基金;
关键词：
chaos; demodulation; modulation; spread spectrum communication; PERFORMANCE;
D O I：
10.1049/cmu2.12859
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
To obtain better spectral efficiency and higher bit rate, a novel carrier index M-ary differential chaos shift keying modulation scheme is proposed. In this system, part of subcarriers is assigned to the chaotic reference so that it can carry extra data bits through carrier index modulation, while one of the remaining subcarriers is activated to transmit the data-bearing signal. In addition, M-ary DCSK modulation is also applied to data-bearing signals based on the constellation theory and Walsh codes. Theoretical bit error rate expressions are derived over the multipath Rayleigh fading and additive white Gaussian noise channels. Simulations and comparisons are performed with various combinations of chaotic sequence lengths, subcarrier numbers and constellation sizes. Results show that the proposed scheme can outperform other counterparts in both spectral efficiency and bit error rate performances.
引用
收藏
页码：1642 / 1649
页数：8
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