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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2604.26778 |
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| _version_ | 1866918474489528320 |
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| author | Zhao, Weijiang Xiong, Yifeng |
| author_facet | Zhao, Weijiang Xiong, Yifeng |
| contents | The implementation of the \ac{isac} feature in \ac{6g} networks is most likely to be based on the framework of \ac{ofdm}. Input distribution design, or constellation design, is a crucial technique in \ac{ofdm}-\ac{isac} systems enabling a favorable balance between communication rate and sensing performance. In this treatise, we propose a computationally efficient input distribution design approach for \ac{ofdm}-\ac{isac} under frequency-selective channels, following the theoretical framework of capacity distortion. We highlight that under practical sensing constraints, the optimal strategy is to treat the kurtosis of constellations as a resource, and allocate it appropriately over subcarriers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_26778 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Input Distribution Design for Ranging-Oriented OFDM-ISAC Systems Under Frequency-Selective Fading Zhao, Weijiang Xiong, Yifeng Information Theory Signal Processing The implementation of the \ac{isac} feature in \ac{6g} networks is most likely to be based on the framework of \ac{ofdm}. Input distribution design, or constellation design, is a crucial technique in \ac{ofdm}-\ac{isac} systems enabling a favorable balance between communication rate and sensing performance. In this treatise, we propose a computationally efficient input distribution design approach for \ac{ofdm}-\ac{isac} under frequency-selective channels, following the theoretical framework of capacity distortion. We highlight that under practical sensing constraints, the optimal strategy is to treat the kurtosis of constellations as a resource, and allocate it appropriately over subcarriers. |
| title | Input Distribution Design for Ranging-Oriented OFDM-ISAC Systems Under Frequency-Selective Fading |
| topic | Information Theory Signal Processing |
| url | https://arxiv.org/abs/2604.26778 |