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In the previous articles, we discussed the FEDformer method that uses the frequency domain to find patterns in a time series. However, the Transformer used in that method can hardly be referred to as a lightweight model. Instead of complex models that require large computational costs, the paper "FITS: Modeling Time Series with 10k Parameters" proposes a method for the frequency interpolation of time series (Frequency Interpolation Time Series - FITS). It is a compact and efficient solution for time series analysis and forecasting. FITS uses frequency domain interpolation to expand the window of the analyzed time segment, thus enabling the efficient extraction of temporal features without significant computational overhead.

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