Affine Filter Bank Modulation: A New Waveform for High Mobility Communications
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866913823141658624 |
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| author | Senger, Henrique L. Gonçalves, Gustavo P. Chang, Bruno S. Rou, Hyeon Seok Ranasinghe, Kuranage Roche Rayan de Abreu, Giuseppe Thadeu Freitas Ruyet, Didier Le |
| author_facet | Senger, Henrique L. Gonçalves, Gustavo P. Chang, Bruno S. Rou, Hyeon Seok Ranasinghe, Kuranage Roche Rayan de Abreu, Giuseppe Thadeu Freitas Ruyet, Didier Le |
| contents | We propose a new waveform suitable for integrated sensing and communications (ISAC) systems facing doubly-dispersive (DD) channel conditions, as typically encountered in high mobility scenarios. Dubbed Affine Filter Bank Modulation (AFBM), this novel waveform is designed based on a filter-bank structure, known for its ability to suppress out-of-band emissions (OOBE), while integrating a discrete affine Fourier transform (DAFT) precoding stage which yields low peak-to-average power ratio (PAPR) and robustness to DD distortion, as well as other features desirable for ISAC. Analytical and simulation results demonstrate that AFBM maintains quasi-orthogonality similar to that of affine frequency division multiplexing (AFDM) in DD channels, while achieving PAPR levels 3 dB lower, in addition to OOBE as low as -100 dB when implemented with PHYDYAS prototype filters. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_03589 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Affine Filter Bank Modulation: A New Waveform for High Mobility Communications Senger, Henrique L. Gonçalves, Gustavo P. Chang, Bruno S. Rou, Hyeon Seok Ranasinghe, Kuranage Roche Rayan de Abreu, Giuseppe Thadeu Freitas Ruyet, Didier Le Signal Processing We propose a new waveform suitable for integrated sensing and communications (ISAC) systems facing doubly-dispersive (DD) channel conditions, as typically encountered in high mobility scenarios. Dubbed Affine Filter Bank Modulation (AFBM), this novel waveform is designed based on a filter-bank structure, known for its ability to suppress out-of-band emissions (OOBE), while integrating a discrete affine Fourier transform (DAFT) precoding stage which yields low peak-to-average power ratio (PAPR) and robustness to DD distortion, as well as other features desirable for ISAC. Analytical and simulation results demonstrate that AFBM maintains quasi-orthogonality similar to that of affine frequency division multiplexing (AFDM) in DD channels, while achieving PAPR levels 3 dB lower, in addition to OOBE as low as -100 dB when implemented with PHYDYAS prototype filters. |
| title | Affine Filter Bank Modulation: A New Waveform for High Mobility Communications |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2505.03589 |