Electrical and Electronic Engineering, Signal Processing, Health Informatics, Multidisciplinary
33
Scopus Publications
341
Scholar Citations
11
Scholar h-index
16
Scholar i10-index
Scopus Publications
Graphene–VO2 hybrid metamaterial biosensor with machine learning–assisted absorption and virus detection in the THz regime Shankar Vuyyala, Subhabrata Roy, Kotagiri Shashidhar Optical Engineering, 2026 In this research, we propose a reconfigurable terahertz (THz) metamaterial-based biosensing structure that integrates graphene with vanadium dioxide (VO2) to achieve intelligent absorption control and virus detection. The hybrid configuration leverages the electrically tunable conductivity of graphene together with the thermally induced phase transition of VO2, resulting in dual-mode switching and improved structural flexibility. The designed device exhibits strong sensing capability, achieving a sensitivity of 3.025 THz/RIU. It also offers a high figure of merit of 44.14 RIU−1 and a quality factor (Q) of 63.41, indicating sharp resonance and efficient performance. These results confirm the sensor’s capability to detect subtle changes in the refractive index of biological samples, making it highly suitable for identifying different viruses and biochemical analytes. In addition, a machine learning framework is incorporated as a numerical surrogate modeling tool to predict absorption trends based on simulated data, thereby reducing computational effort and accelerating parametric design exploration. Compared with previously reported VO2-, MXene-, and graphene-based absorbers, the proposed biosensor exhibits improved tunability, higher detection accuracy, and adaptive functionality. This work, therefore, demonstrates a viable route toward next-generation smart THz biosensors for biomedical diagnostics and sensing technologies. The reported results are based on full-wave numerical simulations and highlight refractive index-based sensing capability, with machine learning used solely as a computational design-assistance tool.
Q-Detect: An Attention-Guided Quantum Ensemble Framework for Robust DeepFake Audio Detection Angshuman Roy, Anuvab Sen, Soham Haldar, Subhabrata Roy Proceedings of the National Conference on Communications Ncc, 2026 The proliferation of DeepFake audio technologies has raised significant security and ethical concerns, necessitating robust detection mechanisms. This paper proposes the novel Q-Detect framework that combines a Quantum Vision Transformer (QViT) with a Bidirectional Long Short-Term Memory (BiLSTM) network enhanced by a custom attention mechanism for efficient DeepFake audio detection. The QViT leverages variational quantum circuits within its attention mechanisms to capture intricate spectral patterns from Mel spectrograms, while the BiLSTM network poses temporal dependencies using extracted audio features. Comparative analysis with state-of-theart CNN architectures and conventional Vision Transformers demonstrates the superiority of our proposed approach, highlighting the potential of quantum-enhanced models in audio forensics.
EEMamba: A Hardware-Aware Energy-Efficient State-Space Model for Eurosat Classification Maneet Chatterjee, Anuvab Sen, Subhabrata Roy International Geoscience and Remote Sensing Symposium IGARSS, 2025 The increasing dimensionality and spectral bandwidth of satellite imagery pose serious challenges to image classification based on remote sensing. Conventional techniques like transformers and convolutional neural networks (CNNs) have been used in the past for image classification, however, they frequently demand high computational costs and have trouble accurately simulating spatiotemporal dependencies. Using the EuroSAT dataset we present EEMamba a novel framework created especially for satellite image classification using State Space Models (SSMs). These problems are resolved by EEMambas integration of SSMs which enable effective latent pattern extraction in multispectral data while preserving a lightweight architecture. This method improves classification accuracy while also lessening the computational load. A significant benefit of our framework is its capacity to maximize feature extraction by utilizing multispectral bands guaranteeing robustness against noise and resolution fluctuations. To measure EEMambas computational efficiency we perform a thorough analysis of floating-point operations per second (FLOPs) and performance enhancements. Large Earth observation datasets are among the real-time geospatial analysis applications that our framework can handle. We prove how EEMamba is a shining example of how state-space dynamics can revolutionize the analysis of geospatial images thus paving the way for future research that employs state-of-the-art machine learning techniques to address the evolving challenges in remote sensing image classification.
MRI-Based Classification of Early and Late Mild Cognitive Impairment Using Correlation-Guided Machine Learning Models Subhabrata Roy, Harsh Raj Gupta, Prashant Kumar 2025 17th IEEE International Conference on Computational Intelligence and Communication Networks Cicn 2025, 2025 Mild Cognitive Impairment (MCI) is a transitional stage between normal aging and Alzheimer's Disease (AD), with subtypes Early MCI (EMCI) and Late MCI (LMCI) exhibiting varying risks of progression. Accurate classification of these substages is crucial for timely therapeutic intervention and clinical trial stratification. This work presents a machine learning-based framework leveraging volumetric features extracted from MRI scans available in the Alzheimer's Disease Neuroimaging Initiative (ADNI) dataset. Three experimental pipelines were explored: (i) Decision Tree models trained on features selected via Point Biserial correlation, (ii) Decision Trees refined through correlation thresholding combined with feature ranking, and (iii) Random Forest classifiers trained on all available features. Model performance was optimized via GridSearchCV and assessed using accuracy, precision, recall, and F1-score. Results demonstrated that Random Forest outperformed other approaches, achieving an accuracy of 95.12 % and balanced precision-recall values of 95.0 %. These findings establish the potential of ensemble learning to effectively differentiate EMCI and LMCI stages. The study highlights the integration of neuroimaging biomarkers with data-driven models as a promising direction for enhancing early-stage AD diagnosis and personalized patient management.
TerraMorphNet: Deep Fusion Ensemble for Mars Hirise Terrain Classification with Custom Features Angshuman Roy, Anuvab Sen, Subhabrata Roy, Subhrajit Deb International Geoscience and Remote Sensing Symposium IGARSS, 2025 We introduce TerraMorphNet, a two-branch ensemble for classifying Martian terrains in HiRISE imagery, featuring a novel set of custom-designed morphological and textural features. The first branch utilizes these unprecedented features-such as crater rims, spider spokes, swiss cheese holes, dune patterns, and slope streak orientations-paired with Adaptive Synthetic Sampling (ADASYN) to train a Random Forest classifier that addresses class imbalance. The second branch compresses deep embeddings from ConvNeXtV2 via a conditional Variational Autoencoder, followed by an MLP enhanced by ADASYN to recognize minority classes like impact ejecta and spiders. By fusing these domain-specific features with robust deep CNN representations through a weighted ensemble, TerraMorPHNET leverages both innovative morphological analysis and state-of-the-art deep learning. Experiments on eight terrain classes demonstrate that our ensemble outperforms individual branches: the Random Forest branch achieves 0.92 average scores while the MLP branch reaches up to 0.95 precision. The final ensemble attains 94.94 % accuracy on a 2,547 -sample test set with high precision, recall, and F1-scores across classes. These results highlight how integrating newly crafted Mars-oriented features with advanced deep embeddings significantly enhances terrain classification, underscoring the impact of novel domain expertise in planetary surface exploration.
AeroMeldNet: Lightweight Multi-Task MambaVision Framework for Real-Time Aerial Scene and Disaster Detection Anuvab Sen, Angshuman Roy, Subhabrata Roy, Subhrajit Deb International Geoscience and Remote Sensing Symposium IGARSS, 2025 Unmanned aerial vehicles (UAVs) and other edge devices often require real-time scene classification and disaster detection under tight resource constraints. However, most existing pipelines treat these tasks separately or artificially merge data, overlooking potential synergies while risking data imbalance. We propose AeroMeldNet, a lightweight partial-labeled multi-task pipeline built on MambaVision, featuring two heads (scene vs. disaster) and advanced optimization stages: pruning, dynamic quantization, half-precision training, and knowledge distillation. Our multi-stage approach drastically reduces FLOPs and parameter counts without sacrificing accuracy. We leverage the AID dataset for aerial scene classification and AIDER dataset for disaster detection, preserving each dataset's unique label space. Extensive experiments indicate up to 95-96% accuracy on respective test sets with significant FLOPs reduction, making it feasible for real-time edge deployment. Our method addresses the scarcity of combined aerial datasets by enabling partiallabeled multi-task training, demonstrating that synergy across tasks can yield robust feature extraction without forcing normal re-labeling. This pipeline sets a practical precedent for resourceefficient drone-based aerial detection systems.
On the Detection of Alzheimer's Disease and Mild Cognitive Impairment using Priority Feature Selection based Decision Tree Classifier Subhabrata Roy, Sukalyan Maity, Sagnik Dutta, Aditya Kumar Thakur, Anjana Banerjee 2025 IEEE Guwahati Subsection Conference Gcon 2025, 2025 Alzheimer’s disease (AD) is one of the most common neurodegenerative dementias affecting the elderly population. Early detection of AD is crucial for improving quality of life, which has led to significant research interest worldwide. This study introduces an innovative approach to categorize brain MRI scans into two groups: mild cognitive impairment (MCI) and AD. The classification leverages volumetric information from four key features: cerebrospinal fluid (CSF), amygdala, caudate, and grey matter (GM). Using an information gain-based feature selection approach and a decision tree classifier, the proposed method is evaluated on ADNI dataset of brain MRI images. The method’s superiority is demonstrated by performance metrics such as accuracy, sensitivity, specificity, and F1-score, which show average gains of 12.02%, 8.52%, and 17.72% in accuracy, sensitivity, and specificity, respectively, when compared to state-of-the-art techniques.
ExoSpikeNet: A Light Curve Analysis Based Spiking Neural Network for Exoplanet Detection Maneet Chatterjee, Anuvab Sen, Subhabrata Roy Proceedings 2024 13th IEEE International Conference on Communication Systems and Network Technologies Csnt 2024, 2024 Exoplanets are celestial bodies orbiting stars beyond our Solar System. Although historically they posed detection challenges, Kepler's data has revolutionized our understanding. By analyzing flux values from t he Kepler (K2) Mission, we investigate the intricate patterns in starlight that may indicate the presence of exoplanets. This study has investigated a novel approach for exoplanet classification using spiking Neural Networks (SNNs) applied to the data obtained from the NASA Kepler (K2) mission. SNNs offer a unique advantage by mimicking the spiking behavior of neurons in the brain, allowing for more nuanced and biologically inspired processing of temporal data. Experimental results showcase the efficacy of the proposed SNN architecture, excelling in terms of various performance metrics such as accuracy, F1 score, precision, and recall.
Graphene–VO2 hybrid metamaterial biosensor with machine learning–assisted absorption and virus detection in the THz regime S Vuyyala, S Roy, K Shashidhar Optical Engineering 65 (4), 047103 , 2026 2026
Q-Detect: An Attention-Guided Quantum Ensemble Framework for Robust DeepFake Audio Detection A Roy, A Sen, S Haldar, S Roy 2026 National Conference on Communications (NCC), 280-285 , 2026 2026
sCNN: An Improved Convolutional Neural Network for Early Detection of Alzheimer's Disease S Roy, GK Maurya 2026 International Conference on Signal Analysis for Smart Systems (SIGNASS … , 2026 2026
MRI-Based Classification of Early and Late Mild Cognitive Impairment Using Correlation-Guided Machine Learning Models S Roy, HR Gupta, P Kumar 2025 IEEE 17th International Conference on Computational Intelligence and … , 2025 2025
TerraMorphNet: Deep Fusion Ensemble for Mars Hirise Terrain Classification with Custom Features A Roy, A Sen, S Roy, S Deb IGARSS 2025-2025 IEEE International Geoscience and Remote Sensing Symposium … , 2025 2025
EEMamba: A Hardware-Aware Energy-Efficient State-Space Model for Eurosat Classification M Chatterjee, A Sen, S Roy IGARSS 2025-2025 IEEE International Geoscience and Remote Sensing Symposium … , 2025 2025
AeroMeldNet: Lightweight Multi-Task MambaVision Framework for Real-Time Aerial Scene and Disaster Detection A Sen, A Roy, S Roy, S Deb IGARSS 2025-2025 IEEE International Geoscience and Remote Sensing Symposium … , 2025 2025
On the Detection of Alzheimer’s Disease and Mild Cognitive Impairment using Priority Feature Selection based Decision Tree Classifier S Roy, S Maity, S Dutta, AK Thakur, A Banerjee 2025 IEEE Guwahati Subsection Conference (GCON), 1-6 , 2025 2025
A review on early detection of Alzheimer’s disease: employing deep learning, machine learning, and statistical methods S Biswas, A Sen, S Roy CSI Transactions on ICT , 2025 2025 Citations: 4
A Survey of Hyperparameter Selection Methods for Weather Forecasting Using State-of-the-Art Machine Learning Algorithms TN Vankala, C Mallick, A Mallik, A Roy, S Sai, S Roy Computational Intelligence: 14th and 15th International Joint Conference on … , 2025 2025
QGAPHnet: quantum genetic algorithm based hybrid QLSTM model for soil moisture estimation S Sai, A Sen, C Mallick, A Mallik, U Sen, M Paul, A Sutradhar, S Roy IGARSS 2024-2024 IEEE International Geoscience and Remote Sensing Symposium … , 2024 2024 Citations: 4
Hbo-devit: Vision transformer based attention-guided evolutionary architecture for ship-iceberg categorisation in arctic sar images A Sen, S Sai, C Mallick, S Roy, U Sen IGARSS 2024-2024 IEEE International Geoscience and Remote Sensing Symposium … , 2024 2024 Citations: 4
ExoSpikeNet: a light curve analysis based spiking neural network for exoplanet detection M Chatterjee, A Sen, S Roy 2024 IEEE 13th International Conference on Communication Systems and Network … , 2024 2024 Citations: 3
DE-ViT: State-Of-The-Art Vision Transformer Model for Early Detection of Alzheimer's Disease A Sen, S Roy, A Debnath, G Jha, R Ghosh 30th National Conference on Communications (NCC 2024), 1-6 , 2024 2024 Citations: 21
A Comparative Analysis on Metaheuristic Algorithms Based Vision Transformer Model for Early Detection of Alzheimer's Disease A Sen, U Sen, S Roy 2023 IEEE 15th International Conference on Computational Intelligence and … , 2023 2023 Citations: 11
A Survey of Hyperparameter Selection Methods for Weather Forecasting Using State-of-the-Art Machine Learning Algorithms A Sen, U Sen, M Paul, A Sutradhar, TN Vankala, C Mallick, A Mallik, ... International Joint Conference on Computational Intelligence, 265-293 , 2023 2023
On the classification of Alzheimer’s disease, mild cognitive impairment and healthy control: maximum a posteriori probability based approach A Chandra, S Roy CSI Transactions on ICT 11 (2-3), 111-118 , 2023 2023 Citations: 4
On the Detection of Alzheimer's Disease using Naïve Bayes Classifier A Chandra, S Roy 2023 International Conference on Microwave, Optical, and Communication … , 2023 2023 Citations: 10
On the detection of Alzheimer’s disease using fuzzy logic based majority voter classifier S Roy, A Chandra Multimedia Tools and Applications 81 (30), 43145-43161 , 2022 2022 Citations: 18
A Deep Learning Approach for the Design of Narrow Transition-Band FIR Filter S Roy, A Chandra Circuits, Systems, and Signal Processing 41 (10), 5578-5613 , 2022 2022 Citations: 8
MOST CITED SCHOLAR PUBLICATIONS
A survey of fir filter design techniques: low-complexity, narrow transition-band and variable bandwidth S Roy, A Chandra Integration 77, 193-204 , 2021 2021 Citations: 50
On the order minimization of interpolated bandpass method based narrow transition band FIR filter design S Roy, A Chandra IEEE Transactions on Circuits and Systems I: Regular Papers 66 (11), 4287-4295 , 2019 2019 Citations: 37
Design of narrow transition band digital filter: An analytical approach S Roy, A Chandra Integration 68, 38-49 , 2019 2019 Citations: 25
A triangular common subexpression elimination algorithm with reduced logic operators in FIR filter S Roy, A Chandra IEEE Transactions on Circuits and Systems II: Express Briefs 67 (12), 3527-3531 , 2020 2020 Citations: 24
DE-ViT: State-Of-The-Art Vision Transformer Model for Early Detection of Alzheimer's Disease A Sen, S Roy, A Debnath, G Jha, R Ghosh 30th National Conference on Communications (NCC 2024), 1-6 , 2024 2024 Citations: 21
On the detection of Alzheimer’s disease using fuzzy logic based majority voter classifier S Roy, A Chandra Multimedia Tools and Applications 81 (30), 43145-43161 , 2022 2022 Citations: 18
On residual energy maximization in energy harvesting cognitive radio network A Banerjee, SP Maity, S Roy 2017 IEEE Wireless Communications and Networking Conference (WCNC), 1-6 , 2017 2017 Citations: 18
On the design of variable filtered-OFDM based LDACS for future generation air-to-ground communication system S Roy, A Chandra IEEE Transactions on Circuits and Systems II: Express Briefs 69 (2), 644-648 , 2021 2021 Citations: 16
Interpolated Band-pass Method Based Narrow-band FIR Filter : A Prospective Candidate in Filtered-OFDM Technique for the 5G Cellular Network S Roy, A Chandra 2019 IEEE Region 10 Conference (TENCON 2019) , 2019 2019 Citations: 13
A Comparative Analysis on Metaheuristic Algorithms Based Vision Transformer Model for Early Detection of Alzheimer's Disease A Sen, U Sen, S Roy 2023 IEEE 15th International Conference on Computational Intelligence and … , 2023 2023 Citations: 11
On the detection of Alzheimer’s disease using support vector machine based majority voter classifier A Chandra, S Roy 2021 8th International conference on signal processing and integrated … , 2021 2021 Citations: 11
A new method for denoising ECG signal using sharp cut-off FIR filter S Roy, A Chandra 2018 International Symposium on Devices, Circuits and Systems (ISDCS) , 2018 2018 Citations: 11
On the Detection of Alzheimer's Disease using Naïve Bayes Classifier A Chandra, S Roy 2023 International Conference on Microwave, Optical, and Communication … , 2023 2023 Citations: 10
Design of FIR filter ISOTA with the aid of genetic algorithm A Chandra, A Kumar, S Roy Integration 79, 107-115 , 2021 2021 Citations: 10
Design of narrow transition band variable bandwidth digital filter S Roy, A Chandra IET Circuits, Devices & Systems 14 (6), 750-757 , 2020 2020 Citations: 10
A new design strategy of sharp cut-off fir filter with powers-of-two coefficients S Roy, A Chandra 2018 International Conference on Wireless Communications, Signal Processing … , 2018 2018 Citations: 10
On outage secrecy minimisation in an energy harvesting relay assisted cognitive radio networks A Banerjee, SP Maity, S Roy IET Communications 12 (18), 2253-2265 , 2018 2018 Citations: 9
A Deep Learning Approach for the Design of Narrow Transition-Band FIR Filter S Roy, A Chandra Circuits, Systems, and Signal Processing 41 (10), 5578-5613 , 2022 2022 Citations: 8
Difference between Alzheimer’s Disease and Mild Cognitive Impairment: Z-test based Study A Chandra, S Roy 2021 IEEE 2nd International Conference on Applied Electromagnetics, Signal … , 2022 2022 Citations: 8
A review on early detection of Alzheimer’s disease: employing deep learning, machine learning, and statistical methods S Biswas, A Sen, S Roy CSI Transactions on ICT , 2025 2025 Citations: 4