A Spectrum-Efficient M-ary Correlation Delay Shift Keying Scheme for Non-coherent Chaotic Communications

被引：9

作者：

Cai, Xiangming ^{[1
]}

Xu, Weikai ^{[1
]}

Hong, Shaohua ^{[1
]}

Wang, Lin ^{[1
]}

机构：

[1] Xiamen Univ, Dept Informat & Commun Engn, Xiamen 361005, Fujian, Peoples R China

来源：

2021 15TH INTERNATIONAL SYMPOSIUM ON MEDICAL INFORMATION AND COMMUNICATION TECHNOLOGY (ISMICT) | 2021年

关键词：

Chaotic communications; correlation delay shift keying; QR decomposition; M-ary modulation; spectral efficiency; PERFORMANCE ANALYSIS; DESIGN;

D O I：

10.1109/ISMICT51748.2021.9434939

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：

Considering the signal structure of a differential chaos shift keying (DCSK) scheme, the reference and information-bearing signals are transmitted sequentially, thereby increasing the probability of being detected by a malicious eavesdropper and degrading the system security. Against this background, a spectrum-efficient M-ary correlation delay shift keying (M-ary CDSK) scheme is proposed in this paper, where a digital signal processing technique, namely QR decomposition, is applied to different chaotic signals to cancel the intrasignal interference completely. The M-ary CDSK scheme can not only improve the system security by embedding the reference signal into theM-ary information-bearing signal, but also achieve better spectral efficiency by M-ary modulation. The analytical bit error rate (BER) expressions are derived to verify the validness of the proposed scheme. Simulation results indicate that the M-ary CDSK scheme is capable of obtaining 1 to 4dB performance gain better than other schemes and providing a reliable solution for non-coherent chaotic communications.

引用

页码：1 / 6

页数：6

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