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Walsh-Hadamard 변환 및 랜덤 인터리빙 기반의 PAPR 저감 OTSM 변조 기법 설계
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- Authors
- 이형원, 박상욱, 류관웅, 최권휴
- Issue Date
- 2025-11
- Citation
- 한국통신학회논문지, v.50, no.11, pp.1709-1719
- ISSN
- 1226-4717
- Publisher
- 한국통신학회
- Language
- Korean
- Type
- Journal Article
- 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.
- KSP Keywords
- BER performance, Bit Error rate, Data Interleaving, Discrete Fourier Transform-spread(DFT-spread), Lower PAPR, Peak to average Power ratio(PAPR), Walsh-Hadamard transform(WHT), doppler effect, high mobility, side information, simulation results