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Affine Filter Bank Modulation: A New Waveform for High Mobility Communications

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arxiv 2505.03589 v1 pith:VT3ZBJO4 submitted 2025-05-06 eess.SP

Affine Filter Bank Modulation: A New Waveform for High Mobility Communications

Henrique L. Senger , Gustavo P. Gon\c{c}alves , Bruno S. Chang , Hyeon Seok Rou , Kuranage Roche Rayan Ranasinghe , Giuseppe Thadeu Freitas de Abreu , Didier Le Ruyet This is my paper
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keywords affinewaveformafbmbankcommunicationsfilterhighisac
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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.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Affine Filter Bank Modulation (AFBM): A Novel 6G ISAC Waveform with Low PAPR and OOBE

    eess.SP 2025-09 conditional novelty 5.0

    AFBM, a filter-banked chirp-precoded waveform, achieves lower PAPR and OOBE than AFDM in simulation while supporting a belief-propagation data receiver and an EM-assisted sensing receiver.

  2. AFDM: Evolving OFDM Towards 6G+

    eess.SP 2026-02 conditional novelty 4.0

    AFDM is presented as an OFDM-backward-compatible 6G+ waveform whose added transceiver cost is two O(N) chirp rotations, supported by a generalized pulse-shaped FDFD channel formulation.