Design and analysis of a new index-modulation-aided DCSK system with frequency-and-time resources

Fang, Y., Zhuo, J., Ma, H., Mumtaz, S. ORCID: 0000-0001-6364-6149 and Li, Y., 2023. Design and analysis of a new index-modulation-aided DCSK system with frequency-and-time resources. IEEE Transactions on Vehicular Technology. ISSN 0018-9545

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We propose a new index-modulation-aided differential chaos shift keying (DCSK) system using frequency-and-time resources, referred to as CTIM-DCSK system, to achieve high-data-rate transmissions. In the proposed system, the orthogonal sinusoidal carriers are used to transmit both the reference-chaotic and the information-bearing signals. Moreover, the frequency-and-time resources are considered as indices to carry additional information bits. To simultaneously boost the bit error rate (BER) performance and reduce the system complexity, this paper proposes a new CTIM-DCSK signal based on the frequency-and-time resources, in which the time slots used by the selected subcarriers convey the same index bits. We employ a noise-reduction method at the receiver to further improve the BER performance of the proposed CTIM-DCSK system. We also derive the theoretical BER expressions of the CTIM-DCSK system over two different channels, i.e., additive white Gaussian noise (AWGN) channel and multipath Rayleigh fading channel. We analyze the data rate, complexity and spectral efficiency of the CTIM-DCSK system in comparison with the state-of-the-art counterparts. Analytical and simulation results verify the accuracy of the theoretical analysis and the advantage of the proposed CTIM-DCSK system. Consequently, the proposed CTIM-DCSK system appears to be a competitive candidate for low-complexity Internet-of-Things applications.

Item Type: Journal article
Publication Title: IEEE Transactions on Vehicular Technology
Creators: Fang, Y., Zhuo, J., Ma, H., Mumtaz, S. and Li, Y.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
ISSN: 0018-9545
Rights: © 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Divisions: Schools > School of Science and Technology
Record created by: Laura Ward
Date Added: 03 Feb 2023 09:20
Last Modified: 03 Feb 2023 09:20

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