Abstract
In this paper, a subcarrier index modulation aided code-shifted differential chaos shift keying (SIM-CS-DCSK) system based on orthogonal frequency division multiplexing (OFDM) is proposed. In the proposed system, the transmitted bits are divided into two parts, where one part is used for conventional CS-DCSK modulation and the other part, served as subcarrier mapping bits, is used for the subcarrier index modulation. Benefiting from index modulation, SIM-CS-DCSK can achieve higher data rate compared to conventional multicarrier CS-DCSK system. Numerical simulations indicate that SIM-CS-DCSK has good BER performance over the time and frequency selective fading channels. Specifically, the proposed system outperforms the multicarrier spread-spectrum system (MCSS) by 0.5 dB to 2 dB. Real-field experiments in water pool and lake also confirm the superiority of the proposed system.
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- 1.
When the subcarrier index modulation is applied in MCSS [24], the resultant system is referred to as SIM-MCSS.
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Wang, D., You, M., Xu, W., Wang, L. (2022). Subcarrier Index Modulation Aided Non-Coherent Chaotic Communication System for Underwater Acoustic Communications. In: Wang, L., Segal, M., Chen, J., Qiu, T. (eds) Wireless Algorithms, Systems, and Applications. WASA 2022. Lecture Notes in Computer Science, vol 13472. Springer, Cham. https://doi.org/10.1007/978-3-031-19214-2_52
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