NPMixer: Hierarchical Neighboring Patch Mixing for Time Series Forecasting

• URL: http://arxiv.org/abs/2605.07476v1
• Date: Fri, 08 May 2026 09:22:51 GMT
• Title: NPMixer: Hierarchical Neighboring Patch Mixing for Time Series Forecasting
• Abstract summary: NPMixer consistently outperforms state-of-the-art models, achieving better performance in 20 out of 28.<n> experiments on seven benchmark datasets demonstrate that NPMixer consistently outperforms state-of-the-art models.
• Score: 10.068780251829606
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Multivariate time series forecasting remains a challenge due to the complexity of local temporal dynamics and global dependencies across multiple variables. In this paper, we propose \textbf{N}eighboring \textbf{P}atching \textbf{Mixer} (\textbf{NPMixer}), a hierarchical architecture featuring a Learnable Stationary Wavelet Transform that adaptively learns filter coefficients to decompose signals into trend and detail components in a data-dependent manner. Our framework introduces a Neighboring Mixer Block that captures local temporal dynamics through a series of hierarchical MLP layers operating on non-overlapping patches. Specifically, the mixer block utilizes MLPs to learn temporal patterns within and across these patches, expanding the receptive field to capture multi-scale dependencies. A Channel-Mixing Encoder is applied to high-frequency components to learn channel correlations while preserving the stability of the underlying global trend. Extensive experiments on seven benchmark datasets demonstrate that NPMixer consistently outperforms state-of-the-art models, achieving better performance in 20 out of 28 ($71.4\%$) evaluated experimental setups for MSE.

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