Low-PAPR OFDM-ISAC Waveform Design Based on Frequency-Domain Phase Differences Article Swipe

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Kaimin Li , Jiahuan Wang , Haixia Cui , Bingpeng Zhou , Pingzhi Fan ·

YOU? · · 2025 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2503.12916

Low peak-to-average power ratio (PAPR) orthogonal frequency division multiplexing (OFDM) waveform design is a crucial issue in integrated sensing and communications (ISAC). This paper introduces an OFDM-ISAC waveform design that utilizes the entire spectrum simultaneously for both communication and sensing by leveraging a novel degree of freedom (DoF): the frequency-domain phase difference (PD). Based on this concept, we develop a novel PD-based OFDM-ISAC waveform structure and utilize it to design a PD-based Low-PAPR OFDM-ISAC (PLPOI) waveform. The design is formulated as an optimization problem incorporating four key constraints: the time-frequency relationship equation, frequency-domain unimodular constraints, PD constraints, and time-domain low PAPR requirements. To solve this challenging non-convex problem, we develop an efficient algorithm, ADMM-PLPOI, based on the alternating direction method of multipliers (ADMM) framework. Extensive simulation results demonstrate that the proposed PLPOI waveform achieves significant improvements in both PAPR and bit error rate (BER) performance compared to conventional OFDM-ISAC waveforms.

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Type: preprint
Language: en
Landing Page: http://arxiv.org/abs/2503.12916
PDF: https://arxiv.org/pdf/2503.12916
OA Status: green
OpenAlex ID: https://openalex.org/W4414900399

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OpenAlex ID: https://openalex.org/W4414900399

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DOI: https://doi.org/10.48550/arxiv.2503.12916

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Title: Low-PAPR OFDM-ISAC Waveform Design Based on Frequency-Domain Phase Differences

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Type: preprint

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Language: en

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Publication year: 2025

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Publication date: 2025-03-17

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Authors: Kaimin Li, Jiahuan Wang, Haixia Cui, Bingpeng Zhou, Pingzhi Fan

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Landing page: https://arxiv.org/abs/2503.12916

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PDF URL: https://arxiv.org/pdf/2503.12916

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Open access: Yes

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OA status: green

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Cited by: 0

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