Blar i NTNU Open på forfatter "Cheffena, Michael"
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Exploiting Dispersive Power Gain and Delay Spread for Sybil Detection in Industrial WSNs: A Multi-Kernel Approach
Li, Qihao; Cheffena, Michael (Journal article; Peer reviewed, 2019)Industrial wireless sensor networks (IWSNs) promote innovations in the industry such as structural status mapping, instrument fault diagnosing, and oriented automation system associating. However, due to the shared nature ... -
Game-Theoretical Analysis of PLC System Performance in the Presence of Jamming Attacks
Ai, Yun; Bhatnagar, Manav R.; Cheffena, Michael; Mathur, Aashish; Sedakov, Artem (Chapter, 2017)In this paper, we investigate the performance of power line communication (PLC) network in the presence of jamming attacks. The legitimate nodes of the PLC network try to communicate with the anchor node of the network ... -
Geometry-Based Modeling of Wideband Industrial Indoor Radio Propagation Channels
Ai, Yun; Hogstad, Bjørn Olav; Cheffena, Michael; Pätzold, Matthias Uwe (Chapter, 2015)In this paper, we present a geometrical scattering model for a typical class of industrial indoor environments. The proposed industrial reference model takes into account scattering components arising from metallic structures ... -
Indoor Channel Estimation Using Single-Snapshot Wideband Measurement
Ai, Yun; Cheffena, Michael; Mohamed, Marshed Kassim; Al-Samman, Ahmed (Chapter, 2020)The successful design of communication systems generally requires knowledge of various channel characteristic parameters. This paper utilizes the reverberation time extracted from single-snapshot wideband measurement to ... -
Industrial Wireless Sensor Networks: Channel Modeling and Performance Evaluation
Cheffena, Michael (Journal article; Peer reviewed, 2012)(provisional) A complete dynamic wideband channel model for industrial wireless sensor network (WSN) is presented. The model takes into account the noise, interferences, strong vibrations and heavy multipath propagation ... -
Industrial wireless sensor networks: channel modeling and performance evaluation
Cheffena, Michael (Journal article; Peer reviewed, 2012)A complete dynamic wideband channel model for industrial wireless sensor network (WSN) is presented. The model takes into account the noise, interferences, strong vibrations and heavy multipath propagation effects present ... -
Land Mobile Satellite Dual Polarized MIMO Channel Along Roadside Trees: Modeling and Performance Evaluation
Cheffena, Michael; Fontán, Fernando Pérez; Lacoste, Frederic; Corbel, Erwan; Mametsa, Henri-Jose; Carrie, Guillaume (Journal article; Peer reviewed, 2012)We present a novel physical-statistical, generative model for the land mobile satellite (LMS), dual polarized, multiple-input-multiple-output (MIMO) channel along tree sided roads. Said model is parameterized by means ... -
Low complexity subspace approach for unbiased frequency estimation of a complex single-tone
Pourafzal, Alireza; Škrabánek, Pavel; Cheffena, Michael; Yildirim, Sule; Roi-Taravella, Thomas (Journal article, 2024)We propose a single-tone frequency estimator of a one-dimensional complex signal in complex white Gaussian noise. The estimator is based on the subspace approach and the unitary transformation. Due to its low space and ... -
A Low-cost and Accurate Microwave Sensor System for Permittivity Characterization
Pourafzal, Alireza; Roi-Taravella, Thomas; Cheffena, Michael; Yildirim Yayilgan, Sule (Peer reviewed; Journal article, 2022)A novel low-cost microwave sensor system is proposed for accurate sensing of the real relative permittivity of materials under test (MUT). The proposed solution eliminates the need for using advanced measurement devices ... -
Mixed Dual-Hop IRS-Assisted FSO-RF Communication System with H-ARQ Protocols
Verma, Gyan Deep; Mathur, Aashish; Ai, Yun; Cheffena, Michael (Peer reviewed; Journal article, 2021)Intelligent reflecting surface (IRS) is an emerging key technology for the fifth-generation (5G) and beyond wireless communication systems to provide more robust and reliable communication links. In this letter, we propose ... -
Modeling and Prediction of Millimeter Wave length Channels
Cheffena, Michael (Doktoravhandlinger ved NTNU, 1503-8181; 2008:271, Doctoral thesis, 2008) -
On Hybrid-ARQ-Based Intelligent Reflecting Surface-Assisted Communication System
Ai, Yun; Mohamed, Marshed Kassim; Kong, Long; Al-Samman, Ahmed; Cheffena, Michael (Peer reviewed; Journal article, 2021)The intelligent reflecting surface (IRS) is an emerging technique to extend the wireless coverage. In this letter, the performance of hybrid automatic repeat request (hybrid-ARQ) for an IRS-assisted system is analyzed. ... -
On Multi-Hop Decode-and-Forward Cooperative Relaying for Industrial Wireless Sensor Networks
Ai, Yun; Cheffena, Michael (Journal article; Peer reviewed, 2017)Wireless sensor networks (WSNs) will play a fundamental role in the realization of Internet of Things and Industry 4.0. Arising from the presence of spatially distributed sensor nodes in a sensor network, cooperative ... -
On Physical Layer Security of Double Rayleigh Fading Channels for Vehicular Communications
Ai, Yun; Cheffena, Michael; Mathur, Aashish; Lei, Hongjiang (Journal article; Peer reviewed, 2018)In this letter, we study the physical layer secrecy performance of the classic Wyner's wiretap model over double Rayleigh fading channels for vehicular communications links. We derive novel and closed-form expressions for ... -
On Physical Layer Security of α-η-κ-μ Fading Channels
Mathur, Aashish; Ai, Yun; Bhatnagar, Manav R.; Cheffena, Michael; Ohtsuki, Tomoaki (Journal article; Peer reviewed, 2018)In this letter, we study the secrecy performance of the classic Wyner’s wiretap model, where the main and eavesdropper channels are modeled by a general and versatile α-η-κ-µ fading model. Novel and exact expressions of ... -
Path-Loss Prediction for an Industrial Indoor Environment Based on Room Electromagnetics
Ai, Yun; Andersen, Jørgen Bach; Cheffena, Michael (Journal article; Peer reviewed, 2017)A simple approach of path-loss and root mean square delay spread prediction for indoor propagation environment is developed based on the room electromagnetics theory. The indoor room environment is interpreted as a lossy ... -
Performance Analysis of a Dual-Hop Wireless-Power Line Mixed Cooperative System
Mathur, Aashish; Bhatnagar, Manav R.; Ai, Yun; Cheffena, Michael (Journal article; Peer reviewed, 2018)Wireless communications and power line communications (PLC) are essential components for smart grid communications. This paper analyses the performance of a dual-hop wireless-power line mixed communication setup employing ... -
Performance Analysis of Hybrid-ARQ over Full-Duplex Relaying Network Subject to Loop Interference under Nakagami- Fading Channels
Ai, Yun; Cheffena, Michael (Chapter, 2017)In this paper, the outage performance of hybrid automatic repeat request (hybrid-ARQ) over a full- duplex decode-and-forward relay network is analyzed. Nakagami-m distribution is assumed for fading channels such that the ... -
Performance Analysis of Hybrid-ARQ with Chase Combining over Cooperative Relay Network with Asymmetric Fading Channels
Ai, Yun; Cheffena, Michael (Chapter, 2016)This paper investigates the performance of cooperative relay networks in the presence of hybrid automatic repeat request (ARQ) with delay constraint. It analyzes the scenarios where the relay channels are asymmetric (i.e., ... -
Performance Analysis of PLC over Fading Channels with Colored Nakagami- Background Noise
Ai, Yun; Ohtsuki, Tomoaki; Cheffena, Michael (Chapter, 2017)Power line communication (PLC) is an emerging technology for the realization of smart grid and home automation. It utilizes existing power line infrastructure for data communication in addition to the transmission of power. ...