Research

My work is at the intersection of machine learning, signal processing, and statistical modeling. A recurring question is how signal structure—and the constraints on observing, communicating, or sharing information—can inform the design and evaluation of learned representations and inference procedures.

Foundations and broader interests

These directions share mathematical questions about probabilistic modeling, representation learning, uncertainty, and inference for structured, high-dimensional data. Broader interests include reinforcement learning and the mathematical foundations of machine learning, especially where these help clarify or evaluate methods for applied problems.

Generative models for complex signals

Another area of interest is generative and foundation modeling for complex signals in communications and biomedicine, particularly behavioral and physiological measurements that may be heterogeneous or partially observed. Key questions include how models can represent signal dynamics, learn useful representations, and support inference across tasks and observation patterns.

Communication and distributed sensing

A further interest is learning and inference when information is distributed across devices, sensors, or agents. In these settings, communication, bandwidth, and decentralization constraints form part of the statistical problem, motivating representations that support a task while limiting what must be shared. Current interests include distributed inference and learning for wireless communication and sensing systems.

Papers and preprints

  1. 2026Published

    Charting the Path to Bifröst: The 2026 ESIT Data-to-Information Competition on Robust CSI-Based Localization and Machine Unlearning

    Alejandro Lancho, Khac-Hoang Ngo, Stefano Rini, Rodrigo Oliver, Ricardo Vazquez-Alvarez

    IEEE BITS the Information Theory Magazine · pp. 1–7 · doi:10.1109/MBITS.2026.3744599

  2. 2026Preprint

    NARRAS: Edge-Triggered Distributed Inference for CSI-Based Localization in Vehicular IoT Networks

    Rodrigo Oliver, Ricardo Vazquez Alvarez, Alejandro Lancho, Stefano Rini

    arXiv:2606.11914

  3. 2025Preprint

    A Vector-Quantized Foundation Model for Patient Behavior Monitoring

    Rodrigo Oliver, Josué Pérez-Sabater, Leire Paz-Arbaizar, Diego Herrero-Quevedo, Antonio Artés-Rodríguez, Alejandro Lancho, Pablo M. Olmos

    arXiv:2503.15221

Download bibliography

Presentations

  1. Early Artificial Intelligence and Pattern Recognition before Deep Learning on the Chinese Mainland, in Hong Kong, and in Taiwan

    5th AEEAO International Congress, Universitat Autònoma de BarcelonaOral presentation

    Accepted; forthcoming

    Sole author and scheduled presenter.

    Details
  2. NARRAS

    13th Spain Workshop on Signal Processing, Information Theory and Communications (SIC'26 Summer), Universidade da CoruñaPoster

    Prepared and presented by Rodrigo Oliver; based on joint work with Ricardo Vázquez Álvarez, Alejandro Lancho, and Stefano Rini.

    Details
  3. A Foundation Model for Patient Behavior Monitoring

    Machine Learning Summer School 2025, Arequipa, PeruPoster

    Poster prepared by Josué Pérez-Sabater, based on our VQ-TSFM preprint; presented jointly with Rodrigo Oliver.