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Author

Xue Chen

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Preprint Sep 2026

Learning Multiband Signals and Fourier-sparse Signals

We consider efficient algorithms to learn multiband signals and Fourier-sparse signals. A mutliband signal has a Fourier transform supported by a bounded number of intervals, say $I_1 \cup I_2 \cdots \cup I_n$. There is a long line of research on multiband signals. In particular, Avron et al. showed an efficient recons...

Dong-Run Cai, Xue Chen, Xiao-Wei Shao · 0 citations
Preprint Jul 2026

Improved Algorithms for Learning Fourier-sparse Signals

The goal is to output a sparse interpolation $\tilde{x}$ such that $\tilde{x}(t) \approx x(t)$ in the time window $[-T,T]$.

Dongrun Cai, Xue Chen, Xiaowei Shao et al. · 1 citation · ⚡1

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