Design of Low PAPR OTSM Modulation Scheme Based on Walsh-Hadamard Transform and Random Interleaving 


Vol. 50,  No. 11, pp. 1709-1719, Nov.  2025
10.7840/kics.2025.50.11.1709


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  Abstract

In this paper, we propose a novel scheme called Small Walsh-Hadamard Transform (WHT) and Random Interleaving Orthogonal Time Sequency Multiplexing (SWRI-OTSM), which reduces the Peak-to-Average Power Ratio (PAPR) while preserving time domain diversity to enhance Bit Error Rate (BER) performance without requiring additional side information (SI). While the discrete Fourier transform-spread-OTFS (DFT-s-OTFS) technique reduces PAPR by applying DFT precoding along the Doppler axis, it compromises time domain diversity effect, leading to degraded performance in high-mobility scenarios. The proposed SWRI-OTSM utilizes Walsh-Hadamard Transform to reduce PAPR while compensating for the impact of Doppler effects through data interleaving. Additionally, SWRI-OTSM is extended to a generalized version by employing random interleaving while maintaining equivalent performance. Simulation results demonstrate that the proposed scheme achieves a lower PAPR compared to DFT-s-OTFS and OTSM, while exhibiting superior BER performance.

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[IEEE Style]

H. Lee, S. Park, K. Ryu, K. Choi, "Design of Low PAPR OTSM Modulation Scheme Based on Walsh-Hadamard Transform and Random Interleaving," The Journal of Korean Institute of Communications and Information Sciences, vol. 50, no. 11, pp. 1709-1719, 2025. DOI: 10.7840/kics.2025.50.11.1709.

[ACM Style]

Hyeongwon Lee, Sangwook Park, Kwanwoong Ryu, and Kwonhue Choi. 2025. Design of Low PAPR OTSM Modulation Scheme Based on Walsh-Hadamard Transform and Random Interleaving. The Journal of Korean Institute of Communications and Information Sciences, 50, 11, (2025), 1709-1719. DOI: 10.7840/kics.2025.50.11.1709.

[KICS Style]

Hyeongwon Lee, Sangwook Park, Kwanwoong Ryu, Kwonhue Choi, "Design of Low PAPR OTSM Modulation Scheme Based on Walsh-Hadamard Transform and Random Interleaving," The Journal of Korean Institute of Communications and Information Sciences, vol. 50, no. 11, pp. 1709-1719, 11. 2025. (https://doi.org/10.7840/kics.2025.50.11.1709)
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pISSN : 1226 - 4717
eISSN : 2287 - 3880