• Kernel Regression over Graphs using Random Fourier Features 

      Meireles Elias, Vitor Rosa; Gogineni, Vinay Chakravarthi; Martins, Wallace; Werner, Stefan (Peer reviewed; Journal article, 2022)
      This paper proposes efficient batch-based and online strategies for kernel regression over graphs (KRG). The proposed algorithms do not require the input signal to be a graph signal, whereas the target signal is defined ...
    • Machine Learning-based Occupancy Estimation Using Multivariate Sensor Nodes 

      Singh, Adarsh Pal; Jain, Vivek; Chaudhari, Sachin; Kraemer, Frank Alexander; Werner, Stefan; Garg, Vishal (Chapter, 2019)
      In buildings, a large chunk of energy is spent on heating, ventilation and air conditioning systems. One way to optimize their usage is to make them demand-driven depending on human occupancy. This paper focuses on accurately ...
    • Machine-Learning Sensor Validation for Digital Twins 

      Darvishi, Hossein (Doctoral theses at NTNU;2023:151, Doctoral thesis, 2023)
      The rapid growth of digital twins (DTs), built upon Internet of Things (IoT) and Industrial IoT systems, demands a large variety of networked sensors’ solutions. Indeed, networked sensors enable various sophisticated ...
    • MMSE filter design for full-duplex filter-and-forward MIMO relays under limited dynamic range 

      Antonio-Rodrigues, Emilio; Werner, Stefan; Lopez-Valcarce, Roberto; Wichman, Risto (Journal article; Peer reviewed, 2019)
      We study the problem of optimizing the end-to-end performance of a full-duplex filter-and-forward MIMO relay link, consisting of a source, a relay, and a destination node, by employing linear filtering at each node. The ...
    • Modeling and Learning Strategies for Graph Signal Processing 

      Elias, Vitor Rosa Meireles (Doctoral theses at NTNU;2021:253, Doctoral thesis, 2021)
      This thesis proposes methods for modeling and learning over graphs. In the scope of graph modeling, we first address the construction of graphs suitable for compressing images that share strong redundancy — in particular, ...
    • Moreau envelope ADMM for decentralized weakly convex optimization 

      Mirzaeifard, Reza; Venkategowda, Naveen K. D.; Jung, Alexander; Werner, Stefan (Chapter, 2023)
      This paper proposes a proximal variant of the alternating direction method of multipliers (ADMM) for distributed optimization. Although the current versions of ADMM algorithm provide promising numerical results in producing ...
    • Nonlinear adaptive filtering with kernel set-membership approach 

      Chen, Kewei; Werner, Stefan; Huang, Yih-Fang; Kuh, Anthony (Peer reviewed; Journal article, 2020)
      This paper develops nonlinear kernel adaptive filtering algorithms based on the set-membership filtering (SMF) framework. The set-membership-based filtering approach is distinct from the conventional adaptive filtering ...
    • Novel VLSI Architecture for Fractional-Order Correntropy Adaptive Filtering Algorithm 

      Alex, Daney; Gogineni, Vinay Chakravarthi; Mula, Subrahmanyam; Werner, Stefan (Journal article; Peer reviewed, 2022)
      Conventional adaptive filters, which assume Gaussian distribution for signal and noise, exhibit significant performance degradation when operating in non-Gaussian environments. Recently proposed fractional-order adaptive ...
    • On Enabling Scalable, Personalized, and Private Federated Learning 

      Gauthier, François (Doctoral theses at NTNU;2024:92, Doctoral thesis, 2024)
      This thesis investigates distributed machine learning for emerging Internet of Things (IoT) and Cyber-Physical Systems (CPS) applications. These applications involve large-scale data collection from distributed, often ...
    • On Stability and Convergence of Distributed Filters 

      Talebi, Sayedpouria; Werner, Stefan; Gupta, Vijay; Huang, Yih-Fang (Peer reviewed; Journal article, 2021)
      Recent years have bore witness to the proliferation of distributed filtering techniques, where a collection of agents communicating over an ad-hoc network aim to collaboratively estimate and track the state of a system. ...
    • Optimal scheduling of multiple spatio-temporally dependent observations for remote estimation using age-of-information 

      Håkansson, Victor Wattin; Dasanadoddi Venkategowda, Naveen Kumar; Werner, Stefan; Varshney, Pramod K. (Journal article; Peer reviewed, 2022)
      This article proposes an optimal scheduling policy for a system where spatiotemporally dependent sensor observations are broadcast to remote estimators over a resource-limited broadcast channel. We consider a system with ...
    • Optimal scheduling of multiple spatio-temporally dependent observations using age-of-information 

      Håkansson, Victor Wattin; Dasanadoddi Venkategowda, Naveen Kumar; Werner, Stefan (Chapter, 2020)
      This paper proposes an optimal scheduling policy for a remote estimation problem, where spatio-temporally dependent sensor observations are broadcasted to remote estimators. At each time instant only observations from a ...
    • Optimal Scheduling Policy for Spatio-temporally Dependent Observations using Age-of-Information 

      Håkansson, Victor Wattin; Dasanadoddi Venkategowda, Naveen Kumar; Werner, Stefan (Chapter, 2020)
      This paper proposes an optimal scheduling policy for a remote estimation problem, where sensor observations of two spatio-temporally correlated processes are broadcasted to two remote estimators. At each time instant only ...
    • Optimal transmission-constrained scheduling of spatio-temporally dependent observations using age-of-information 

      Håkansson, Victor Wattin; Dasanadoddi Venkategowda, Naveen Kumar; Werner, Stefan; Varshney, Pramod K. (Peer reviewed; Journal article, 2022)
      This paper proposes an optimal scheduling policy for broadcasting spatio-temporally dependent observations to two remote estimators over a finite time horizon. The system comprises a scheduler that can broadcast one ...
    • Optimization Strategy for Energy Allocation through Cooperative Storage Management 

      Leithon, Johann; Werner, Stefan; Koivunen, Visa (Chapter, 2021)
      We propose a strategy to optimize energy utilization through battery management in a cooperative environment where households share access to a community-owned energy farm. The households are equipped with lossy rechargeable ...
    • Performance of clustered multitask diffusion LMS suffering from inter-node communication delays 

      Gogineni, Vinay Chakravarthi; Talebi, Sayed Pouria; Werner, Stefan (Peer reviewed; Journal article, 2021)
      This brief studies a clustered multitask diffusion least mean-square strategy that accounts for communication delays in the inter- and intra-cluster information exchanges. We conduct detailed performance analysis and ...
    • Personalized Online Federated Learning for IoT/CPS: Challenges and Future Directions 

      Gogineni, Vinay Chakravarthi; Werner, Stefan; Gauthier, Francois; Huang, Yih-Fang; Kuh, Anthony (Journal article, 2022)
      In recent years, federated learning (FL) has emerged as a powerful paradigm for distributed learning thanks to its privacy-preserving capabilities. With the use of FL, a network of edge devices can make intelligent decisions ...
    • Price-aware renewable energy management with transmission losses 

      Leithon, Johann; Werner, Stefan; Koivunen, Visa; Talebi, Sayed Pouria (Chapter, 2019)
      In this paper we propose a genie-aided strategy to optimize the use of renewable energy (RE) in a community of households with shared access to storage and RE generation facilities. The households are spread over a limited ...
    • Privacy-Preserved Distributed Learning With Zeroth-Order Optimization 

      Gratton, Cristiano; Kumar Dasanadoddi Venkategowda, Naveen; Arablouei, Reza; Werner, Stefan (Peer reviewed; Journal article, 2022)
      We develop a privacy-preserving distributed algorithm to minimize a regularized empirical risk function when the first-order information is not available and data is distributed over a multi-agent network. We employ a ...
    • Privacy-preserving distributed Kalman filtering 

      Moradi, Ashkan; Dasanadoddi Venkategowda, Naveen Kumar; Talebi, Sayedpouria; Werner, Stefan (Journal article; Peer reviewed, 2022)