Sumit Roy
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View article: Assessing the impact of adopting Blockchain technology in Electronic voting system: Empirical evidence from Bangladesh
Assessing the impact of adopting Blockchain technology in Electronic voting system: Empirical evidence from Bangladesh Open
Electronic voting has emerged as a competitive alternative to traditional paper-based methods to address inconsistencies and enhance security in voting systems. Recent dissatisfaction with the security and openness of conventional voting s…
View article: Improved Floyd-Warshall Algorithm for Solving Travelling Salesman Problem
Improved Floyd-Warshall Algorithm for Solving Travelling Salesman Problem Open
The shortest path problem is a fundamental challenge in graph theory, focused on identifying the most efficient routes between nodes in a network. It stands as one of the extensively researched combinatorial optimization problems. In this …
View article: Revisiting Multi-User Downlink in IEEE 802.11ax: A Designers Guide to MU-MIMO
Revisiting Multi-User Downlink in IEEE 802.11ax: A Designers Guide to MU-MIMO Open
Downlink (DL) Multi-User (MU) Multiple Input Multiple Output (MU-MIMO) is a key technology that allows multiple concurrent data transmissions from an Access Point (AP) to a selected sub-set of clients for higher network efficiency in IEEE …
View article: An international benchmark for wind plant wakes from the American WAKE ExperimeNt (AWAKEN)
An international benchmark for wind plant wakes from the American WAKE ExperimeNt (AWAKEN) Open
This article introduces the first benchmark study within the International Energy Agency Wind Task 57 framework, focusing on wind plant wakes. Leveraging data from the American WAKE ExperimeNt (AWAKEN), the benchmark aims to assess the acc…
View article: IEEE 802.11be Network Throughput Optimization with Multi-Link Operation and AP Coordination
IEEE 802.11be Network Throughput Optimization with Multi-Link Operation and AP Coordination Open
IEEE 802.11be (Wi-Fi 7) introduces a new concept called multi-link operation (MLO), which allows multiple Wi-Fi interfaces in different bands (2.4, 5, and 6 GHz) to work together to increase network throughput, reduce latency, and improve …
View article: Topology of moduli of parabolic connections with fixed determinant
Topology of moduli of parabolic connections with fixed determinant Open
Let $X$ be a compact Riemann surface of genus $g \geq 2$ and $D\subset X$ be a fixed finite subset. Let $ξ$ be a line bundle of degree $d$ over $X$. Let $\mathcal{M}(α, r, ξ)$ (respectively, $\mathcal{M}_{\mathrm{conn}}(α, r, ξ)$) denote t…
View article: On The Capacity of Low-Rank Dyadic Fading Channels in the Low-SNR Regime
On The Capacity of Low-Rank Dyadic Fading Channels in the Low-SNR Regime Open
We characterize the capacity of a low-rank wireless channel with varying fading severity at low signal-to-noise ratios (SNRs). The channel rank deficiency is achieved by incorporating pinhole condition. The capacity degradation with fading…
View article: Semi-Persistent Scheduling in NR Sidelink Mode 2: MAC Packet Reception Ratio Model and ns-3 Validation
Semi-Persistent Scheduling in NR Sidelink Mode 2: MAC Packet Reception Ratio Model and ns-3 Validation Open
5G New Radio (NR) Sidelink (SL) has demonstrated the promising capability for infrastructure-less cellular coverage. Understanding the fundamentals of the NR SL channel access mechanism, Semi-Persistent Scheduling (SPS), which is specified…
View article: Static Background Removal in Vehicular Radar: Filtering in Azimuth-Elevation-Doppler Domain
Static Background Removal in Vehicular Radar: Filtering in Azimuth-Elevation-Doppler Domain Open
Anti-collision assistance, integral to the current drive towards increased vehicular autonomy, relies heavily on precise detection and localization of moving targets in the vehicle's vicinity. A crucial step towards achieving this is the r…
View article: Verification of ns-3 Wi-Fi Rate Adaptation Models on AWGN Channels
Verification of ns-3 Wi-Fi Rate Adaptation Models on AWGN Channels Open
The performance of Wi-Fi networks depends on the ability of devices to adapt their transmissions to dynamic channel/network conditions. Hence, "Rate Adaptation Algorithms (RAAs)" have been devised to allow nodes to select appropriate modul…
View article: Efficient PHY Layer Abstraction for 5G NR Sidelink in ns-3
Efficient PHY Layer Abstraction for 5G NR Sidelink in ns-3 Open
Physical (PHY) layer abstraction is an effective method to reduce the runtimes compared with link simulations but still accurately characterize the link performance. As a result, PHY layer abstraction for IEEE 802.11 WLAN and 3GPP LTE/5G h…
View article: On torsion-freeness of Kähler differential sheaves
On torsion-freeness of Kähler differential sheaves Open
Let $X$ be a normal algebraic variety over an algebraically closed field $k$ of characteristic zero. We prove that the Kähler differential sheaf of $X$ is torsion-free if and only if any regular section of the ideal sheaf of the first orde…
View article: Towards 5G new radio sidelink communications: A versatile link-level simulator and performance evaluation
Towards 5G new radio sidelink communications: A versatile link-level simulator and performance evaluation Open
Sidelink in cellular networks enables direct exchange of data packets between devices without the need for network infrastructure, resulting in various benefits, including communication in out-of-coverage areas and possible decrease in lat…
View article: Mutual Interference Mitigation for MIMO-FMCW Automotive Radar
Mutual Interference Mitigation for MIMO-FMCW Automotive Radar Open
This paper considers mutual interference mitigation among automotive radars using frequency-modulated continuous wave (FMCW) signal and multiple-input multiple-output (MIMO) virtual arrays. For the first time, we derive a general interfere…
View article: Optimal Beam Training for mmWave Massive MIMO using 802.11ay
Optimal Beam Training for mmWave Massive MIMO using 802.11ay Open
Beam training of 802.11 ad is a technology that helps accelerate the analog weighting vector (AWV) selection process under the constraint of the existing code-book for AWV. However, 5G milli-meter wave (mmWave) multiple-input-multiple-outp…
View article: Spectral data for parabolic projective symplectic/orthogonal Higgs bundles
Spectral data for parabolic projective symplectic/orthogonal Higgs bundles Open
Hitchin in [Duke Math. J. 54 (1), 91-114 (1987)] introduced a proper morphism from the moduli space of stable $G$-Higgs bundles ($G=\mathrm{GL}(n,\mathbb{C}),\mathrm{Sp}(2m,\mathbb{C})$ and $\mathrm{SO}(n,\mathbb{C})$) over a curve to a ve…
View article: Picard group of moduli of parabolic Higgs bundles
Picard group of moduli of parabolic Higgs bundles Open
Let $X$ be a compact Riemann surface of genus $g\geq 3$ and let $\mathcal{M}_{\mathrm{par}}$ be the moduli space of semistable parabolic bundles over $X$. Let $\mathcal{M}_{\mathrm{parH}}$ denote the moduli space of semistable parabolic Hi…
View article: 5G New Radio Sidelink Link-Level Simulator and Performance Analysis
5G New Radio Sidelink Link-Level Simulator and Performance Analysis Open
Since the Third Generation Partnership Project (3GPP) specified 5G New Radio (NR) sidelink in Release 16, researchers have been expressing increasing interest in sidelink in various research areas, such as Proximity Services (ProSe) and Ve…
View article: Architecture-Algorithmic Trade-offs in Multi-path Channel Estimation for mmWAVE Systems
Architecture-Algorithmic Trade-offs in Multi-path Channel Estimation for mmWAVE Systems Open
5G mmWave massive MIMO systems are likely to be deployed in dense urban scenarios, where increasing network capacity is the primary objective. A key component in mmWave transceiver design is channel estimation which is challenging due to t…
View article: Multiaccess Point Coordination for Next-Gen Wi-Fi Networks Aided by Deep Reinforcement Learning
Multiaccess Point Coordination for Next-Gen Wi-Fi Networks Aided by Deep Reinforcement Learning Open
Wi-Fi in the enterprise - characterized by overlapping Wi-Fi cells -\nconstitutes the design challenge for next-generation networks. Standardization\nfor recently started IEEE 802.11be (Wi-Fi 7) Working Groups has focused on\nsignificant m…
View article: IEEE WLANs in 5 vs 6 GHz: A Comparative Study
IEEE WLANs in 5 vs 6 GHz: A Comparative Study Open
US Federal Communications Commission (FCC) has adopted new rules to open the 6 GHz bands for unlicensed access as the increasing demand for wireless networks. The new ruling limits operation by a Power Spectral Density (PSD) limit in 6 GHz…
View article: Efficient PHY Layer Abstraction under Imperfect Channel Estimation
Efficient PHY Layer Abstraction under Imperfect Channel Estimation Open
As most existing work investigate the PHY layer abstraction under an assumption of perfect channel estimation, it may become unreliable if there exists channel estimation error in a real communication system. This letter improves an effici…
View article: Learning to Detect Open Carry and Concealed Object With 77 GHz Radar
Learning to Detect Open Carry and Concealed Object With 77 GHz Radar Open
Detecting harmful carried objects plays a key role in intelligent surveillance systems and has widespread applications, for example, in airport security. In this paper, we focus on the relatively unexplored area of using low-cost 77GHz mmW…
View article: On birational Torelli theorems
On birational Torelli theorems Open
Let $G$ be a simple simply-connected connected linear algebraic group over $\mathbb{C}$. We proved a $2$-birational Torelli theorem for the moduli space of semistable principal $G$-bundles over a smooth curve of genus $\geq 3$, which says …
View article: Perception Through 2D-MIMO FMCW Automotive Radar Under Adverse Weather
Perception Through 2D-MIMO FMCW Automotive Radar Under Adverse Weather Open
Millimeter-wave (mmWave) radars are being increasingly integrated in commercial vehicles to support new Adaptive Driver Assisted Systems (ADAS) features that require accurate location and Doppler velocity estimates of objects, independent …
View article: Validation of the ns-3 802.11ax OFDMA implementation
Validation of the ns-3 802.11ax OFDMA implementation Open
The introduction of Orthogonal Frequency Division Multiple Access (OFDMA) in 802.11ax signifies a change in role for the Access Point (AP) in WiFi networks, with the opportunity to implement more complex scheduling logic to handle Downlink…
View article: Coexistence of Age and Throughput Optimizing Networks: A Spectrum Sharing Game
Coexistence of Age and Throughput Optimizing Networks: A Spectrum Sharing Game Open
We investigate the coexistence of an age optimizing network (AON) and a throughput optimizing network (TON) that share a common spectrum band. We consider two modes of long run coexistence: (a) networks compete with each other for spectrum…