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Publications related to Communication Systems (10,000)
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Article
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A novel single material-based anti-resonant fiber is designed, investigated, and explored in this article with supports of up to 64 OAM modes over the 0.6 μm to 1.0 μm as operating wavelength. The other properties of the designed fiber including confinement loss (CL), OAM purity, effective refractive index differences (ERIDs), and dispersion variat...
Article
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Background To evaluate Inferior vena cava (IVC) filter retrieval practices over a 9-year period at an academic hospital with a prospectively maintained IVC filter registry. Method An IVC filter registry was maintained prospectively within our institution. We reviewed cases between August 2011 and June 2020, following filter status, retrieval plans...
Article
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A consequence of our progressively ageing global population is the increasing prevalence of worldwide age-related cognitive decline and dementia. In the absence of effective therapeutic interventions, identifying risk factors associated with cognitive decline becomes increasingly vital. Novel perspectives suggest that a dynamic bidirectional commun...
Article
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Virtual reality (VR) applications, especially those where the user is untethered to a computer, are becoming more prevalent as new hardware is developed, computational power and artificial intelligence algorithms are available, and wireless communication networks are becoming more reliable, fast, and providing higher reliability. In fact, recent pr...
Article
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Signal conversion plays an important role in many applications such as communication, sensing, and imaging. Realizing signal conversion between optical and microwave frequencies is a crucial step to construct hybrid communication systems that combine both optical and microwave wireless technologies to achieve better features, which are highly desir...
Article
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Nowadays, the Compressive Sensing theory has an important effect on many communication system’s performances, and one of these applications is the radar system. Applying CS in the radar such as Linear Frequency Modulation Continuous Wave (LFMCW) radar signals has many advantages but suffers from the processing time in the two-dimensional processing...
Article
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This research paper highlights the importance of communication system in selected sugar factories. Human resource is one of the most vital assets of an organization. It is the people who make other resources moving, they perform various activities in different functional areas. Human resource handles all physical and financial resources in an organ...
Preprint
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5G has achieved large-scale commercialization across the world and the global 6G research and development is accelerating.To support more new use cases, 6G mobile communication systems should satisfy extreme performance requirements far beyond 5G. The physical layer key technologies are the basis of the evolution of mobile communication systems of...
Conference Paper
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Reconfigurable intelligent surface (RIS) is a research hotspot for the fifth generation evolution (5GE) and the sixth generation (6G) wireless communication systems to extend high-frequency coverage. Due to the increase of the carrier frequency of the wireless communication system and the large scale of the RIS array, the near-field region is signi...
Conference Paper
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Reliability assessment is essential for risk management of infrastructure systems such as power networks and communication systems. The probability of failure is defined as the probability that the performance function drops below some threshold value. This probability can be estimated efficiently by importance sampling (IS), which performs samplin...
Article
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A low‐profile eight‐element printed dipole antenna (PDA) array backed by broadband rhomboid artificial magnetic conductor (AMC) is introduced for wireless communication systems. By loading a 4 × 27 AMC reflector into the eight‐element array of PDA, a low‐profile wideband structure with enhanced radiation properties is achieved. The measured S param...
Article
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One of the network communication systems in our surroundings that has a significant influence on our day-to-day lives is the satellite network. Many authentications and key agreement procedures have been developed for satellite communication systems in order to ensure secure communication. None, however, offer the satellite communication system wit...
Article
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In this article, a novel miniaturized antipodal Vivaldi antenna (AVA) is proposed with significant improvement in the back and sidelobe levels (SLLs) to mitigate their adverse effect on the communication system components. The proposed AVA enhances SLL up to −5.7 dB and front to back ratio (FBR) to 20.2 dB. These improvements are accomplished by an...
Article
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This paper presents a novel in‐home communication system employing plastic optical fibers (POFs) acting both as transmission medium and access point for wireless links to user devices, hence no separate luminaires or optical–electrical–optical conversions is required. All active devices, such as lasers/detectors, can be remotely placed from the roo...
Article
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The challenge of tracking unmanned aerial vehicles (UAVs) is arising out of increasing their market and spread usage in many applications. Miscuing UAVs can lead to potential threats as they are considered an essential part of national security. One of the major issues in communication with UAVs is the enormous amount of data generated by UAVs that...
Article
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A wideband dual‐polarized antenna with high isolation is proposed for full‐duplex applications. It consists of a radiating patch, two E‐shaped strips, a parasitic patch, a metal reflector, and a 180° power divider. Two hook‐shaped strips and a pair of E‐shaped strips are used to excite the radiating patch realize ±45° polarization. The impedance ma...
Article
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Nonlinear optical switching is a prominent technology for high-speed data processing. All-optical switching based on phase-shifted fiber Bragg Grating provides a tremendous opportunity with advantages such as improved efficiency, sensitivity, lightweight, and cost-effective parameters as compared to traditional optical switching for designing diffe...
Article
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This research proposes the architecture of a SAC-OCDMA–OFDM–DWDM system using a flat optical frequency comb generator and coherent communication. Its aim is to create a new OCDMA communication system that is specifically intended for multiservice networks. The suggested architectural design is numerically simulated and analyzed using OptiSystem and...
Article
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The paper introduces a reliable system, providing a sufficient solution for the associated nodes during hand-offs.  It investigates different QoS mechanisms, deploying each mechanism into various interfaces, and overall network performance when nodes switch between available interfaces.  It compares overall performance and feasibility of QoS mech...
Conference Paper
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. The article discusses the features of monitoring aircraft systems using the radio telemetry method, which helps to improve flight safety due to timely troubleshooting actions based on the data received. Illustrated methods for collecting and transmitting data, using existing communication systems and the observation of trends in some equipment. К...
Article
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the topic of the present special issue, namely “Antenna Designs for 5G/IoT and Space Applications” is of crucial importance in the today and future communication systems. Antennas are important devices in the hardware, that transform guide to radiated waves or vice-versa. Their spatial extension and topology strongly determine the performances. Bot...
Book
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We will follow complete project in our whole book for Requirement Engineering Process. OnlineLawFirm is a Real-Time Cloud-Based android application that will assist society. We aim to help people solve their problems and guide them by providing the best possible solution. Another goal of the application is to bring all the interested parties on a s...
Article
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Narrow laser pulses have been essential sources in optical communication system. High data rate optical communication network system demands compressed laser source with unique optical property. In this work using pulsed duration (9) ns, peak power 1.2297mW, full width half maximum (FWHM) 286 pm, and wavelength center 1546.7 nm as compression laser...
Poster
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With the heavy use of standard optical telecommunication bands and the ever increasing RF spectra congestion, emerging spectral bands are becoming of great interest Possible technologies up to medium distances are visible light communications or free space optical links. The PhD research will be focused on the optical signal generation detection u...
Article
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In recent time where electronics and telecommunications play a vital and integral part in the technological advancements of the society in areas like Biomedical applications, defence communication systems, Aeronautical field, wireless communications systems, Space Systems etc. filters are utilized in all the fields mentioned above, therefore this p...
Article
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Next-generation wireless communication networks are expected to support massive connectivity with high data rate, low power consumption, and computational latency. However, it can significantly enhance the existing network complexity, which results in high latency. To ease this situation, mobile edge cloud and massive multiple input and multiple ou...
Article
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The fifth generation (5G) of telecommunications networks is currently commercially deployed. One of their core enabling technologies is cellular Massive Multiple-Input-Multiple-Output (M-MIMO) systems. However, future wireless networks are expected to serve a very large number of devices and the current MIMO networks are not scalable, highlighting...
Article
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With the increasing demand for high bandwidth wireless communication systems, and with a congested spectrum in the sub-6 GHz frequency bands, researchers have been looking into exploration of millimeter wave (mmWave) and sub-terahertz (sub-THz) frequency bands. Channel modeling is essential for system design and performance evaluation of new wirele...
Article
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The interest on applications where machine learning algorithms and communications are combined has been on a rising in recent years. Machine learning and neural networks are being advocated as a way of improving the performance of several functions across all layers of future communication systems. Furthermore, in applications where complexity redu...
Article
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In modern optical communication system, noise rejection multiple access interference (MAI) must be rejected in dense access network (DAN). This paper will study the dual optical band pass and notch filters. They will be extracted with tunable FWHM using 10cm (PMF) with different cladding diameters formed with etching 125μm PMF after immersing it wi...
Preprint
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Communication is an essential element of modern software, yet programming and analysing communicating systems are difficult tasks. A reason for this difficulty is the lack of compositional mechanisms that preserve relevant communication properties. This problem has been recently addressed for the well-known model of communicating systems, that is s...
Article
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Channel estimation is a significant constraint for the communication system. The channel estimation in wireless communication systems is carried out by adopting distinct approaches. In addition to this, the more important techniques are Minimum Mean Square Error (MMSE), and Least Square (LS). Here, the LS process for estimating the channels is simp...
Article
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Acoustic communication plays a vital role in frog reproduction. In most anuran species, long-distance sound communication is one-way from males to females; during the reproductive season, males produce species-specific advertisement calls to attract gravid females, and females are generally silent but perform phonotactic movements that lead to ampl...
Preprint
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In this paper, we investigate an intelligent reflecting surface (IRS)-assisted integrated sensing and communication (ISAC) system design in a clutter environment. Assisted by an IRS equipped with a uniform linear array (ULA), a multi-antenna base station (BS) is targeted for communicating with multiple communication users (CUs) and sensing multiple...
Preprint
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Passive beamforming in reconfigurable intelligent surfaces (RISs) enables a feasible and efficient way of communication when the RIS reflection coefficients are precisely adjusted. In this paper, we present a framework to track the RIS reflection coefficients with the aid of deep learning from a time-series prediction perspective in a terahertz (TH...
Article
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The Japanese National Institute of Information and Communications Technology (NICT) is currently developing a high-performance laser-communication terminal for CubeSats aimed at providing a high-datarate communication solution for LEO satellites requiring transmission of large volumes of data from orbit. A key aspect of the communication system is...
Article
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Tourism is very much part of the globalization process. It is sound to analyse whether the tourism industry requires the marketing efforts as in the case of other products. In fact, the tourism industry requires a reliable and effective communication system to ascertain the wishes, needs, motivations, likes and dislikes of tourists. Moreover, touri...
Article
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Free space optical communication (FSOC) is a promising technology for satellite-to-earth communication systems, where vector beams, especially orbital angular momentum (OAM), can further increase the capacity of the optical link. However, atmospheric turbulence along the path can introduce intensity scintillation, wavefront aberrations and severe d...
Article
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Designing solar-enabled and power grid connected, 'dual-powered', cellular networks is challenging due to the double stochasticity arising from energy harvest and user traffic, resulting in spatio-temporally varying traffic-energy imbalances. Improper strategy to optimize the power grid connectivity results in generation of significant carbon footp...
Article
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In a reconfigurable intelligent surface (RIS) assisted millimeter Wave (mmWave) communication system, the channel coefficient increases exponentially with the number of RIS elements which results in expensive pilot overhead. Most previous works have proposed some channel estimation algorithms for the estimation accuracy of cascaded channels, which...
Preprint
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This paper analyzes the energy efficiency of a novel system model where unmanned aerial vehicles (UAVs) are used to provide coverage for user hotspots (user clusters) and are deployed on charging pads to enhance the flight time. We introduce a new notion of "cluster pairs" to capture the dynamic nature of the users spatial distribution in order to...
Article
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Non-orthogonal multiple access (NOMA) is very promising for the future wireless communication systems. The primary goal of this paper is to provide precise outage probability formulas for downlink-NOMA-based communication systems over non-homogeneous fading scenarios. The outage probability of NOMA is analyzed over κ-μ,α-κ-μ\documentclass[12pt]{min...
Article
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Polar codes have become the channel coding scheme for control channel of enhanced mobile broadband in the 5G communication systems. Belief propagation (BP) decoding of polar codes has advantages of low decoding latency and high parallelism but achieves worse bit error ratio (BER) performance compared with the successive cancellation list (SCL) deco...
Preprint
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In this work, we characterize the outage probability (OP) of an intelligent reflecting surface (IRS) assisted multi-user multiple-input-single-output (MU-MISO) communication system. Using a two-step approximation method, we approximate the signal-to-interference-plus-noise ratio (SINR) for any downlink user by a Log-Normal random variable. The impa...
Article
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This article presents a four-element multiple-input multiple-output (MIMO) antenna design for next-generation millimeter-wave (mmWave) communication systems. The single antenna element of the MIMO systems consists of a T-shaped and plow-shaped patch radiator designed on an ultra-thin Rogers RT/Duroid 5880 substrate. The dimensions of the single ant...
Research
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Kalman-type filters are extremely useful in diverse real-world applications, including robotics, communication systems, GNSS, inertial navigation, chemical plant control, predicting the weather, multi-sensor data fusion, tracking of aircraft, satellites, ships, rockets, cars, people, cows, etc. Moreover, Kalman filters are relatively easy to design...
Article
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SNOW-V is a stream cipher recently designed for the 5G communication systems. This paper proposes two efficient algorithms to evaluate precise correlations of SNOW-V’s two main nonlinear components, fully considering the linear hull effects. Based on these algorithms, we can efficiently find more high-correlation linear approximations than before....
Article
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While e-learning (electronic learning) technologies are continuously developing, there are number of emerging issues and challenges that have significant impact on e-learning teacher education. E-learning technologies comprise all forms of electronically supported learning and teaching. The information and communication systems, whether network lea...
Preprint
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We propose a new spectrum allocation strategy, aided by unsupervised learning, for multiuser terahertz communication systems. In this strategy, adaptive sub-band bandwidth is considered such that the spectrum of interest can be divided into sub-bands with unequal bandwidths. This strategy reduces the variation in molecular absorption loss among the...
Article
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VoIP is a protocol designed to improve voice over IP and other networks based on packet switching. The birth of VoIP came as an alternative to the expensive public telephone network (PSTN) for voice transmission. Given QoS for VoIP, factors such as system capacity, frequency, packet delay, loss, and channel configurations are of paramount importanc...
Preprint
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Innovative reconfigurable intelligent surface (RIS) technologies are rising and recognized as promising candidates to enhance 6G and beyond wireless communication systems. RISs acquire the ability to manipulate electromagnetic signals, thus, offering a degree of control over the wireless channel and the potential for many more benefits. Furthermore...
Article
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This research paper highlights the importance of communication system in selected sugar factories. Human resource is one of the most vital assets of an organization. It is the people who make other resources moving, they perform various activities in different functional areas. Human resource handles all physical and financial resources in an organ...
Conference Paper
Full-text available
Quality assurance in diagnostic radiology and its effects in the optimization of radiation protection are well known, but in practice, especially, in low-and middle-income countries, there seems to be little or no effort made towards optimization of radiation protection in diagnostic radiology, through quality assurance. This study evaluated the pa...
Article
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In this Vital Health Parameters Measurement, there are measurements of various parameters of Patient using Wemos D1 R2 mini. In the Health monitoring system based on Wemos, the real-time parameter of a patient's health is sent to the cloud using cloud MQTT. These Parameters are sent to a remote location so that the user can view these details on th...
Article
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Now wireless communications growing in no time, in their applied techniques and instrumentation. Hardware reduction became a main objective for fewer value and fewer complexness wireless communication devices and systems. one in all the foremost economical solutions for the hardware complexness reduction in wireless communication systems is package...
Preprint
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The increasingly crowded spectrum has spurred the design of joint radar-communications systems that share hardware resources and efficiently use the radio frequency spectrum. We study a general spectral coexistence scenario, wherein the channels and transmit signals of both radar and communications systems are unknown at the receiver. In this dual-...
Article
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Neuroscience extensively uses the information theory to describe neural communication, among others, to calculate the amount of information transferred in neural communication and to attempt the cracking of its coding. There are fierce debates on how information is represented in the brain and during transmission inside the brain. The neural inform...
Preprint
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We present a volumetric communication system that is designed for remote assistance of procedural tasks. The system allows a remote expert to visually guide a local operator. The two parties share a view that is spatially identical, but for the local operator it is of the object on which they operate, while for the remote expert, the object is pres...
Conference Paper
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Search and Rescue (SAR) operations can take significant advantage through the use of Unmanned Aerial Vehicles (UAVs) and communication systems. In this article, we explored the functionalities of RAN Intelligent Controllers (RICs) for managing and orchestrating network components aimed at critical mission operations assisted by UAVs. For example, U...
Article
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The 2019 Philippine Universal Health Care Act (Republic Act 11223) was set for implementation in January 2020 when disruptions brought on by the pandemic occurred. Will the provisions of the new UHC Act for an improved health system enable agile responses to forthcoming shocks, such as this COVID-19 pandemic? A content analysis of the 2019 Philippi...
Article
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Communications are realized as a result of successive decisions at the physical layer, from modulation selection to multi-antenna strategy, and each decision affects the performance of the communication systems. Future communication systems must include extensive capabilities as they will encompass a wide variety of devices and applications. Conven...
Article
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Households and buildings have been utilizing the traditional electric network structure for the last decade, relying on energy supplied by manufacturing centers based on fossil fuels. Large energy use places a burden on such centers. In this perspective, smart grids are a new technology and a new generation of traditional electric networks that pro...
Article
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In her narrative, "Am I that Name?", Stacy Holman Jones tackles the dilemma of identity and becoming in the light of using language as a means of naming and becoming. This new function of language surpasses the traditional accounts which see it either in terms of a set of structures and forms to be learned or as a communicative system that the lear...