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eess.SP2026
Signal-Aware Cayley Completion: Choosing Between an Exact and a Lossy Abelian Host
Rigobert Fokam Soup, Laurent Bitjoka
Group-embedding graph signal processing buys exact Fourier analysis either by enlarging the domain until a graph embeds isometrically into an abelian Cayley graph, or by perturbing…
eess.SP2026
Tight Wavelet Frames on Graphs via Isometric Group Embedding
Rigobert Fokam Souop, Laurent Bitjoka
Spectral graph wavelets apply a kernel to the graph Laplacian spectrum. On an irregular graph their analyzing functions inherit a non-canonical eigenbasis, they do not form a tight…
eess.SP2026
Harmonic Analysis on Graphs via Isometric Group Embedding: A Canonical Fourier Transform, Shift, and Convolution for Network Signals
Rigobert Fokam Souop, Laurent Bitjoka
Graph signal processing built on the eigenvectors of a Laplacian or adjacency shift inherits three structural compromises: the eigenbasis is fixed only up to rotation within degene…