no code implementations • 31 Jan 2024 • Geethu Joseph
The convergence of expectation-maximization (EM)-based algorithms typically requires continuity of the likelihood function with respect to all the unknown parameters (optimization variables).
no code implementations • 4 Dec 2023 • Rupam Kalyan Chakraborty, Geethu Joseph, Chandra R. Murthy
We present a Bayesian approach that exploits the input sparsity to significantly improve estimation accuracy.
no code implementations • 30 Nov 2023 • Geethu Joseph, Chen Zhong, M. Cenk Gursoy, Senem Velipasalar, Pramod K. Varshney
Our objective is to design a sequential selection policy that dynamically determines which processes to observe at each time with the goal to minimize the delay in making the decision and the total sensing cost.
no code implementations • 8 Nov 2023 • Geethu Joseph, Shana Moothedath, Jiabin Lin
This paper studies the problem of modifying the input matrix of a structured system to make the system strongly structurally controllable.
no code implementations • 11 Oct 2023 • Weijia Yi, Nitin Jonathan Myers, Geethu Joseph
Our method exploits the sparse structure in mmWave channels for low training overhead and accounts for the phase errors in the channel measurements due to phase noise at the oscillator.
1 code implementation • 11 Oct 2023 • Yanbin He, Geethu Joseph
The prior art only exploits the Kronecker structure in the support of the sparse vector and solves the entire linear system together leading to high computational complexity.
1 code implementation • 27 Jul 2023 • Yanbin He, Geethu Joseph
We study the sparse recovery problem with an underdetermined linear system characterized by a Kronecker-structured dictionary and a Kronecker-supported sparse vector.
no code implementations • 20 Oct 2022 • Yanbin He, Geethu Joseph
This paper presents novel cascaded channel estimation techniques for an intelligent reflecting surface-aided multiple-input multiple-output system.
no code implementations • 20 May 2022 • Nitin Jonathan Myers, Yanki Aslan, Geethu Joseph
Phased arrays in near-field communication allow the transmitter to focus wireless signals in a small region around the receiver.
no code implementations • 3 Jan 2022 • Geethu Joseph, M. Cenk Gursoy, Pramod K. Varshney
Based on the received observations, the decisionmaker first determines whether to declare that the number of anomalies has exceeded the threshold or to continue taking observations.
no code implementations • 8 Dec 2021 • Geethu Joseph, Chen Zhong, M. Cenk Gursoy, Senem Velipasalar, Pramod K. Varshney
In this setting, we develop an anomaly detection algorithm that chooses the processes to be observed at a given time instant, decides when to stop taking observations, and declares the decision on anomalous processes.
no code implementations • 29 Sep 2021 • Saikiran Bulusu, Geethu Joseph, M. Cenk Gursoy, Pramod Varshney
Further, we prove that ${O}(\frac{1}{\epsilon p^4}\log\frac{d}{\delta})$ samples are sufficient for our algorithm to estimate the NN parameters within an error of $\epsilon$ with probability $1-\delta$ when the probability of a sample being uncorrupted is $p$ and the problem dimension is $d$.
no code implementations • 12 May 2021 • Geethu Joseph, Chen Zhong, M. Cenk Gursoy, Senem Velipasalar, Pramod K. Varshney
In this paper, we address the anomaly detection problem where the objective is to find the anomalous processes among a given set of processes.
no code implementations • 12 May 2021 • Geethu Joseph, M. Cenk Gursoy, Pramod K. Varshney
In this setting, we develop an anomaly detection algorithm that chooses the process to be observed at a given time instant, decides when to stop taking observations, and makes a decision regarding the anomalous processes.
no code implementations • 26 May 2020 • Geethu Joseph, M. Cenk Gursoy, Pramod K. Varshney
Our objective is to design a sequential sensor selection policy that dynamically determines which processes to observe at each time and when to terminate the detection algorithm.
no code implementations • 24 May 2020 • Geethu Joseph
In this paper, we study the conditions to be satisfied by a discrete-time linear system to ensure output controllability using sparse control inputs.