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데이터 시퀀스 매핑 및 대체를 통한 OTFS에서의 PAPR 저감 기법
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- Authors
- 박상욱, 이형원, 류관웅, 최권휴
- Issue Date
- 2025-10
- Citation
- 한국통신학회논문지, v.50, no.10, pp.1545-1551
- ISSN
- 1226-4717
- Publisher
- 한국통신학회
- Language
- Korean
- Type
- Journal Article
- Abstract
- Multicarrier systems, such as Orthogonal Frequency Division Multiplexing (OFDM) and Orthogonal Time Frequency Space (OTFS), suffer from high Peak-to-Average Power Ratio (PAPR), which degrades the efficiency of high-power amplifiers. To address the PAPR issue in OTFS, Discrete Fourier Transform spread OTFS (DFT- s-OTFS) has been proposed, which reduces PAPR through DFT precoding. However, this process leads to bit error rate (BER) performance degradation in high-speed mobile environments due to diversity loss. In this paper, we propose a PAPR reduction scheme that effectively lowers the PAPR while preserving the diversity of OTFS by substituting high-PAPR data sequences with low-PAPR ones. To this end, the Hungarian algorithm is employed to establish optimal mapping relationships between data sequences, which are then used for substitution. Simulation results demonstrate that the proposed scheme achieves lower PAPR and improved BER performance compared to conventional OTFS and DFT-s-OTFS.
- KSP Keywords
- BER performance, Bit Error rate, Discrete Fourier transform spread(DFT-S), High-speed mobile environments, Lower PAPR, Multi-carrier systems, Orthogonal Frequency-Division Multiplexing(OFDM), PAPR Reduction, Peak to average Power ratio(PAPR), high power amplifier, hungarian algorithm