Vertex-Frequency Energy Distributions
Ljubiša Stanković, Miloš Daković, Ervin Sejdić · Signals and communication technology · 2017
A vertex-varying spectral content on graphs challenges the assumption of vertex invariance and requires vertex-frequency representations for an adequate analysis. In this letter, we introduce a class of vertex-frequency energy distributions inspired by traditional time-frequency energy distributions. These newly introduced distributions do not use localization windows. Their efficiency in energy concentration is illustrated through examples.