A5017242814- Satellite Communication Systems
- Wireless Communication Networks Research
- Advanced Wireless Communication Techniques
- Advanced Wireless Network Optimization
- Advanced MIMO Systems Optimization
- Advanced Data Compression Techniques
- Mobile Agent-Based Network Management
- Spacecraft Design and Technology
- Precipitation Measurement and Analysis
- PAPR reduction in OFDM
- Network Traffic and Congestion Control
- Cooperative Communication and Network Coding
- Speech and Audio Processing
- Telecommunications and Broadcasting Technologies
- IoT Networks and Protocols
- Radio Wave Propagation Studies
- Error Correcting Code Techniques
- IPv6, Mobility, Handover, Networks, Security
- Digital Filter Design and Implementation
- Antenna Design and Analysis
- Distributed and Parallel Computing Systems
- Cognitive Radio Networks and Spectrum Sensing
- Soil Moisture and Remote Sensing
- Power Line Communications and Noise
- Distributed systems and fault tolerance
University of Surrey
2015-2024
University of Exeter
2018
Cardiff University
2016-2017
Illinois Institute of Technology
2007
Rensselaer Polytechnic Institute
2007
Acoustical Society of America
2007
Jazz Pharmaceuticals (Italy)
2007
Strong Memorial Hospital
2005
University of Rochester Medical Center
2005
Health Protection Agency
2005
This article surveys the literature over period of last decade on emerging field self organisation as applied to wireless cellular communication networks. Self has been extensively studied and in adhoc networks, sensor networks autonomic computer networks; however context this is first attempt put perspective various efforts form a tutorial/survey. We provide comprehensive survey existing literature, projects standards organising Additionally, we also aim present clear understanding active...
Satellite communication systems are a promising solution to extend and complement terrestrial networks in unserved or under-served areas, as reflected by recent commercial standardization endeavors. In particular, 3GPP recently initiated study item for new radio, i.e., 5G, non-terrestrial aimed at deploying satellite either stand-alone an integration mobile broadband machine-type scenarios. However, typical channel impairments, large path losses, delays, Doppler shifts, pose severe...
In this article we examine the role of satellite communications in future telecommunication networks and service provision. Lessons from past indicate that satellites are successful as a result their wide area coverage or speed to market for new services. Niche areas such air sea will persist, but land masses convergence fixed, mobile, broadcasting dictate only way forward is an integrated format with terrestrial systems. We outline ways satellites, discuss research challenges technology...
Multibeam satellite networks in Ka band have been designed to accommodate the increasing traffic demands expected future. However, these systems are spectrum limited due current allocation policies. This paper investigates potential of applying cognitive radio techniques communications (SatCom) order increase opportunities for future generations without interfering with operation incumbent services. These extra can potentially amount 2.4 GHz bandwidth downlink and 2 uplink high density fixed...
The explosive growth of various services boosts the innovation and development in terrestrial communication systems for implementation next generation mobile networks. However, simply utilizing limited resources networks is difficult to support massive quality service (QoS) aware requirements it hard guarantee seamless coverage far remote regions. Leveraging intrinsic merits high altitude ability multicasting or broadcasting, satellite provide an opportunity novel with its tight interaction...
The next generation of mobile radio communication systems - so called 5G will provide some major changes to those generations date. ability cope with huge increases in data traffic at reduced latencies and improved quality user experience together reduction energy usage are big challenges. In addition future need embody connections billions objects the Internet Things (IoT) which raise new Visions now available from regions across World research is ongoing towards standards. consensus a...
Summary This paper presents initial results available from the European Commission Horizon 2020 5G Public Private Partnership Phase 2 project “SaT5G” (Satellite and Terrestrial Network for 5G). After describing concept, objectives, challenges, research pillars addressed by SaT5G project, this elaborates on selected use cases scenarios satellite communications positioning in usage scenario of enhanced mobile broadband.
Satellite communication has recently been included as one of the key enabling technologies for 5G backhauling, especially delivery bandwidth-demanding enhanced mobile broadband (eMBB) applications in 5G. In this paper, we present a 5G-oriented network architecture that is based on satellite communications and multi-access edge computing to support eMBB applications, which investigated EU 5GPPP phase-2 terrestrial project. We specifically focus using proposed assure quality-of-experience...
We present the British Association for Sexual Health and HIV (BASHH) guidelines post-exposure prophylaxis after sexual exposure (PEPSE) to HIV. This document includes a review of current data support use PEPSE, considers how calculate risks infection potential exposure, provides recommendations on when PEPSE would not be considered. Other areas included are possible impact behaviour, cost-effectiveness, issues relating service provision. Throughout document, consideration is given place...
SUMMARY This paper presents a feasibility study for fixed broadband access High Throughput Satellite terabit/second system by considering appropriate state‐of‐the‐art communication technologies. For the investigated model, DVB‐S2 and DVB‐RCS2 are assumed as air interfaces forward return link, respectively. The performance of Adaptive Coding Modulation is examined along with potential extensions these standards. example, very low rate DVB‐RCS turbo codes their evaluated. In addition,...
In this paper we review some of the work the' Satellite Working Group' in European Technology platform NETWORLD2020 towards a strategy for satellites 5G. We first 5G vision and its drivers as defined by terrestrial mobile community via 5GPPP Association. then outline areas which satellite can contribute to an integrated system within detail research challenges that provides. Finally give views on technology roadmap meet these such are ready 2020 play their part roll out.
This paper addresses the Smart Gateway diversity scheme to be employed in future High Throughput Satellite Systems (HTS) at Ka, Q/V bands or above. The availability of a network N gateways is presented with P redundant and active multiplexed gateways. A new time switched architecture compared more conventional frequency division system for N-active but retaining transparent satellite transponders. In addition, resource allocation algorithms are compared, end end, which maximize throughput...
As the Virtual Centre of Excellence in Mobile and Personal Communications (Mobile VCE) moves into its second core research programme it has been decided to set up a fourth generation (4G) Visions Group aimed at harmonising work across areas amongst numerous researchers working on programme. This paper outlines initial group provides start what will become an evolving vision 4G. A short history previous generations mobile communications systems discussion limitations third (3G) are followed...
Abstract It may be that we are now entering the era of LEO constellation satellite communications after thirty years domination by GEO systems. This paper heralds coming new with a tutorial approach to system design and trade‐offs design. discusses orbital configurations, network topologies routeing considerations, multiple access schemes link performance In so doing it brings out major parameters how they interact each other. Also considered service applications for systems, important...
A robust and efficient technique for frame/symbol timing carrier frequency synchronization in OFDM systems is presented. It uses a preamble consisting of only one training symbol with two identical parts to achieve reliable accuracy the time-domain, over wide estimation range which can be up half signal sampling frequency. Also, it has low complexity adaptive degree channel distortion. Computer simulations Rayleigh fading ISI show that proposed method achieves superior performance existing...
A new approach to the scattering of electromagnetic radiation by dielectric scatterers and application it case homogeneous spheroidal ellipsoidal raindrops is presented. We transform (singular) integral equation for into an Fourier internal field, which has a nonsingular kernel. This solved reducing quadrature set algebraic equations. The amplitude so obtained shown satisfy Schwinger variational principle, method thus both numerically stable known be convergent. present sample calculations...
In order to improve the manageability and adaptability of future 5G wireless networks, software orchestration mechanism, named defined networking (SDN) with control user plane (C/U-plane) decoupling, has become one most promising key techniques. Based on these features, hybrid satellite terrestrial network is expected support flexible customized resource scheduling for both massive machine-type- communication (MTC) high-quality multimedia requests while achieving broader global coverage,...
SUMMARY To reach the terabit per second of throughput, telecommunication satellites cannot make use frequency below Ka band only. Therefore, broad portion spectrum available at Q/V (40/50 GHz) is foreseen for feeder link. This study presents evaluation performances different macro‐diversity schemes that may allow mitigating deep fades experienced bands by introducing cooperation and a limited redundancy between gateways system. Two solutions are firstly described. The resulting from those...
Objective: To describe the epidemiology of HIV infection acquired in Africa and among African communities United Kingdom. Design: Descriptive analysis using national AIDS surveillance data, routine voluntary confidential reporting unlinked anonymous seroprevalence surveys Kingdom to end December 2001. Results: Of all reported infections diagnosed by 2001, 21% (9993 48 226) were probably 90% these heterosexually acquired. Numbers diagnoses have been increasing rapidly, with rises from...
An improved method for estimating the frame/symbol timing offset in preamble-aided OFDM systems is presented. It uses a conventional preamble structure and combines autocorrelation techniques with restricted crosscorrelation to achieve near-ideal performance without significant increase complexity. Computer simulations show that robust both AWGN fading multipath channels, achieving better than existing methods.
The results of applying the Fredholm integral equation method solution to scattering electromagnetic radiation from oblate spheroidal raindrops for communication bands 4, 6, 11, 14, 20, 30 GHz are presented in paper. These amplitudes then used calculate propagation characteristics such as attenuation, phase rotation and crosspolarisation a rain-filled medium. validity using Van de Hulst single-scattering is considered, conditions its use presented. A new more general relationship between...
Future internet demands are being increased dramatically year by year. Terrestrial systems unable to satisfy these in all geographical areas and thus broadband access satellite is a key service provision platform. Considering the traffic demands, raw capacity should approach Terabit/s 2020 meet demands. So challenge reduce cost/bit increase from today's 10 Gbps 1 Tbps 2020. In order find available spectrum, migration higher bands such as Ka-band, Q/V considered neccessity. But migrating have...
Printers are always seeking higher productivity by increasing their production rates and minimizing process delays. When delays have known causes, they can be mitigated acquiring causal rules from human experts then applying sensors automated real-time diagnostic devices to the process. However, for some only weak knowledge or none at all. In such cases, machine learning tools collect training data it through an induction engine in search of knowledge. We applied a strategy as decision tree...