385 citations · 1.8k across the 36 of their papers we have counts for
6 papers · 1 filter
The Dual Graph Shift Operator: Identifying the Support of the Frequency Domain
Geert Leus, Santiago Segarra, Alejandro Ribeiro +1
Contemporary data is often supported by an irregular structure, which can be conveniently captured by a graph. Accounting for this graph support is crucial to analyze the data, lea…
Rethinking Sketching as Sampling: A Graph Signal Processing Approach
Fernando Gama, Antonio G. Marques, Gonzalo Mateos +1
Sampling of signals belonging to a low-dimensional subspace has well-documented merits for dimensionality reduction, limited memory storage, and online processing of streaming netw…
Blind Identification of Graph Filters
Santiago Segarra, Gonzalo Mateos, Antonio G. Marques +1
Network processes are often represented as signals defined on the vertices of a graph. To untangle the latent structure of such signals, one can view them as outputs of linear grap…
Distributed Linear Network Operators using Graph Filters
Santiago Segarra, Antonio G. Marques, Alejandro Ribeiro
We study the design of graph filters to implement arbitrary linear transformations between graph signals. Graph filters can be represented by matrix polynomials of the graph-shift…
Underlay Cognitive Radios with Capacity Guarantees for Primary Users
Antonio G. Marques
To use the spectrum efficiently, cognitive radios leverage knowledge of the channel state information (CSI) to optimize the performance of the secondary users (SUs) while limiting…
Optimizing Orthogonal Multiple Access based on Quantized Channel State Information
Antonio G. Marques, Georgios B. Giannakis, Javier Ramos
The performance of systems where multiple users communicate over wireless fading links benefits from channel-adaptive allocation of the available resources. Different from most exi…