Search Results for author: Arpan Chattopadhyay

Found 18 papers, 0 papers with code

Quickest Detection of False Data Injection Attack in Distributed Process Tracking

no code implementations15 Feb 2024 Saqib Abbas Baba, Arpan Chattopadhyay

In the Bayesian setting where there is a known prior distribution of the attack beginning instant, we formulate a Bayesian quickest change detection (QCD) problem for FDI detection in order to minimize the mean detection delay subject to a false alarm probability constraint.

Change Detection

Inverse Reinforcement Learning With Constraint Recovery

no code implementations14 May 2023 Nirjhar Das, Arpan Chattopadhyay

In this work, we propose a novel inverse reinforcement learning (IRL) algorithm for constrained Markov decision process (CMDP) problems.

reinforcement-learning

Inverse Unscented Kalman Filter

no code implementations4 Apr 2023 Himali Singh, Kumar Vijay Mishra, Arpan Chattopadhyay

In this setting, a cognitive `adversary' tracks its target of interest via a stochastic framework such as a Kalman filter (KF).

Inverse Cubature and Quadrature Kalman filters

no code implementations18 Mar 2023 Himali Singh, Kumar Vijay Mishra, Arpan Chattopadhyay

Recent developments in counter-adversarial system research have led to the development of inverse stochastic filters that are employed by a defender to infer the information its adversary may have learned.

Numerical Integration

Online Reinforcement Learning in Periodic MDP

no code implementations16 Mar 2023 Ayush Aniket, Arpan Chattopadhyay

We study learning in periodic Markov Decision Process (MDP), a special type of non-stationary MDP where both the state transition probabilities and reward functions vary periodically, under the average reward maximization setting.

reinforcement-learning Reinforcement Learning (RL)

Multi-target Range and Angle detection for MIMO-FMCW radar with limited antennas

no code implementations28 Feb 2023 Himali Singh, Arpan Chattopadhyay

In this context, we propose a novel multi-target localization algorithm in the range-angle domain for a MIMO FMCW radar with a sparse array of randomly placed transmit and receive elements.

Compressive Sensing

Counter-Adversarial Learning with Inverse Unscented Kalman Filter

no code implementations1 Oct 2022 Himali Singh, Kumar Vijay Mishra, Arpan Chattopadhyay

In this paper, we address this scenario by formulating inverse cognition as a nonlinear Gaussian state-space model, wherein the adversary employs an unscented Kalman filter (UKF) to estimate the defender's state with reduced linearization errors.

Inverse Extended Kalman Filter -- Part II: Highly Non-Linear and Uncertain Systems

no code implementations13 Aug 2022 Himali Singh, Arpan Chattopadhyay, Kumar Vijay Mishra

The purpose of this paper and the companion paper (Part I) is to address the inverse filtering problem in non-linear systems by proposing an inverse extended Kalman filter (I-EKF).

Online Reinforcement Learning for Periodic MDP

no code implementations25 Jul 2022 Ayush Aniket, Arpan Chattopadhyay

We study learning in periodic Markov Decision Process(MDP), a special type of non-stationary MDP where both the state transition probabilities and reward functions vary periodically, under the average reward maximization setting.

reinforcement-learning Reinforcement Learning (RL)

Design and Detection of Controller Manipulation Attack on RIS Assisted Communication

no code implementations21 Feb 2022 Siddharth Sankar Acharjee, Arpan Chattopadhyay

In the third case, non-parametric Kolmogorov-Smirnov test is further simplified to a simple per-sample double threshold test.

Age-of-information minimization via opportunistic sampling by an energy harvesting source

no code implementations8 Jan 2022 Akanksha Jaiswal, Arpan Chattopadhyay, Amokh Varma

setting, after probing a channel, the optimal source node sampling policy is shown to be a threshold policy involving the instantaneous age of the process, the available energy in the buffer and the instantaneous channel quality as the decision variables.

Q-Learning

Inverse Extended Kalman Filter -- Part I: Fundamentals

no code implementations5 Jan 2022 Himali Singh, Arpan Chattopadhyay, Kumar Vijay Mishra

The purpose of this paper and the companion paper (Part II) is to develop the theory of I-EKF in detail.

Compressive Sensing Based Adaptive Defence Against Adversarial Images

no code implementations11 Oct 2021 Akash Kumar Gupta, Arpan Chattopadhyay, Darpan Kumar Yadav

This paper proposes a novel Compressive sensing based Adaptive Defence (CAD) algorithm which combats distortion in frequency domain instead of time domain.

Adversarial Attack Compressive Sensing

Design of false data injection attack on distributed process estimation

no code implementations14 Jan 2021 Moulik Choraria, Arpan Chattopadhyay, Urbashi Mitra, Erik Strom

Each agent node computes an estimate of the process by using its sensor observation and messages obtained from neighboring nodes, via Kalman-consensus filtering.

Centralized active tracking of a Markov chain with unknown dynamics

no code implementations30 Oct 2020 Mrigank Raman, Ojal Kumar, Arpan Chattopadhyay

A Lagrangian relaxation of the problem is solved by an artful blending of two tools: Gibbs sampling for MSE minimization and an on-line version of expectation maximization (EM) to estimate the unknown TPM.

Quickest Bayesian and non-Bayesian detection of false data injection attack in remote state estimation

no code implementations29 Oct 2020 Akanshu Gupta, Abhinava Sikdar, Arpan Chattopadhyay

The quickest attack detection problem for a known {\em linear} attack scheme in the Bayesian setting with a Geometric prior on the attack initiation instant is posed as a constrained Markov decision process (MDP), in order to minimize the expected detection delay subject to a false alarm constraint, with the state involving the probability belief at the estimator that the system is under attack.

Efficient detection of adversarial images

no code implementations9 Jul 2020 Darpan Kumar Yadav, Kartik Mundra, Rahul Modpur, Arpan Chattopadhyay, Indra Narayan Kar

In such attacks, some or all pixel values of an image are modified by an external attacker, so that the change is almost invisible to the human eye but significant enough for a DNN-based classifier to misclassify it.

Image Classification

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