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Zhang Q.,University of Essex | Liu W.,University of Essex | Tsang E.,University of Essex | Virginas B.,Adastral
IEEE Transactions on Evolutionary Computation | Year: 2010

In some expensive multiobjective optimization problems (MOPs), several function evaluations can be carried out in a batch way. Therefore, it is very desirable to develop methods which can generate multipler test points simultaneously. This paper proposes such a method, called MOEA/D-EGO, for dealing with expensive multiobjective optimization. MOEA/D-EGO decomposes an MOP in question into a number of single-objective optimization subproblems. A predictive model is built for each subproblem based on the points evaluated so far. Effort has been made to reduce the overhead for modeling and to improve the prediction quality. At each generation, MOEA/D is used for maximizing the expected improvement metric values of all the subproblems, and then several test points are selected for evaluation. Extensive experimental studies have been carried out to investigate the ability of the proposed algorithm. © 2006 IEEE.


News Article | February 24, 2017
Site: phys.org

The research team has undertaken field trials of a massive MIMO system at the BT Labs in Adastral Park, Suffolk. The trials were conducted in a large indoor hall mimicking a stadium environment and outdoors within the Adastral Park campus. The goals were to test massive MIMO spatial multiplexing indoors and improve the understanding of massive MIMO radio channels under mobile conditions with untethered devices. While carrying out these field experiments, the team obtained promising results indicating that this technology could offer spectrum efficiency figures in excess of the 100 bits/s/Hz mark, improving upon the capacity of today's long term evolution (LTE) systems by ten times. It is expected that techniques such as massive MIMO, which offers full spatial multiplexing - where multiple data streams are transmitted at the same time and on the same radio channel - will become a crucial part of future 5G networks; the next generation of mobile technology. The research team, consisting of five PhD students from Bristol's EPSRC Centre for Doctoral Training in Communications and a researcher from Lund University, under the leadership of Professor Mark Beach, worked with the BT research team, led by Ian Mings, to assess the performance of a 128 element Massive MIMO system operating at 3.5 GHz at BT's Adastral Park campus. Initial experiments took place in BT's large exhibition hall and used 12 streams in a single 20MHz channel to show the real-time transmission and simultaneous reception of ten unique video streams, plus two other spatial channels demonstrating the full richness of spatial multiplexing supported by the system. The system was also shown to support the simultaneous transmission of 24 user streams operating with 64QAM on the same radio channel with all modems synchronising over-the-air. It is believed that this is the first time such an experiment has been conducted with truly un-tethered devices, from which the team were able to infer a spectrum efficiency of just less than 100bit/s/Hz and a sum rate capacity of circa two Gbits/s in this single 20MHz wide channel. In addition to the indoor trials, a series of outdoor experiments were conducted with the array at a height of around 20 metres. This enabled far field array characterisation, multi-element handset performance as well as experiments to improve the understanding of the massive MIMO radio channel under mobile conditions to be carried out. Mark Beach, Professor of Radio Systems Engineering in the Department of Electrical and Electronic Engineering and Manager of the EPSRC CDT in Communications, explained: "We are delighted to be collaborating with BT. Massive MIMO is a key technology for 5G and the research team's achievements last year with massive MIMO arrays, which are cellular base stations with more than 100 antennas, demonstrates that this technology could deliver ultra-fast data rates to high densities of smartphones and tablets." Professor Tim Whitley, Managing Director, Research and Innovation at BT, added: "The BT Labs have a long history of pioneering wireless research, and with the acquisition of EE, we're excited to once again be at the forefront of mobile technology development. Massive MIMO has the potential to significantly boost available data rates in future 5G mobile networks, and we're pleased to be able to explore that potential with leading academics in the field at the University of Bristol." The experimental system uses the same flexible SDR platform from NI that leading wireless researchers in industry and academia are using to define 5G. To achieve accurate, real-time performance, the researchers took full advantage of the system's FPGAs using LabVIEW Communications System Design and the recently announced NI MIMO Application Framework. As lead users, both the Universities of Bristol and Lund worked closely with NI to implement, test and debug this framework prior to its product release. It now provides the ideal foundations for the rapid development, optimization and evaluation of algorithms and techniques for massive MIMO. The state-of-the-art platform was made possible thanks to hardware provided by Bristol Is Open, a joint venture between the University and Bristol City Council that aims to make Bristol the first open programmable city in the world. Spectrum and power efficient wireless communications are core to Bristol University's Communication Systems and Networks (CSN) Group and the EPSRC Centre for Doctoral Training (CDT in Communications as well as to the Department of Electrical and Information Technology at Lund University. The researchers are now processing the data sets and aim to publish their findings in leading journals in the near future as well as adding enhancements to the system in preparation for further trials. Explore further: New world record in 5G wireless spectrum efficiency


News Article | February 24, 2017
Site: www.eurekalert.org

The quest for highly efficient 5G wireless connectivity has been given a boost thanks to a collaboration between a team of 5G engineers from the Universities of Bristol and Lund, National Instruments (NI), and BT, one of the world's leading providers of communications services. The research team has undertaken field trials of a massive MIMO system at the BT Labs in Adastral Park, Suffolk. The trials were conducted in a large indoor hall mimicking a stadium environment and outdoors within the Adastral Park campus. The goals were to test massive MIMO spatial multiplexing indoors and improve the understanding of massive MIMO radio channels under mobile conditions with untethered devices. While carrying out these field experiments, the team obtained promising results indicating that this technology could offer spectrum efficiency figures in excess of the 100 bits/s/Hz mark, improving upon the capacity of today's long term evolution (LTE) systems by ten times. It is expected that techniques such as massive MIMO, which offers full spatial multiplexing - where multiple data streams are transmitted at the same time and on the same radio channel - will become a crucial part of future 5G networks; the next generation of mobile technology. The research team, consisting of five PhD students from Bristol's EPSRC Centre for Doctoral Training in Communications and a researcher from Lund University, under the leadership of Professor Mark Beach, worked with the BT research team, led by Ian Mings, to assess the performance of a 128 element Massive MIMO system operating at 3.5 GHz at BT's Adastral Park campus. Initial experiments took place in BT's large exhibition hall and used 12 streams in a single 20MHz channel to show the real-time transmission and simultaneous reception of ten unique video streams, plus two other spatial channels demonstrating the full richness of spatial multiplexing supported by the system. The system was also shown to support the simultaneous transmission of 24 user streams operating with 64QAM on the same radio channel with all modems synchronising over-the-air. It is believed that this is the first time such an experiment has been conducted with truly un-tethered devices, from which the team were able to infer a spectrum efficiency of just less than 100bit/s/Hz and a sum rate capacity of circa two Gbits/s in this single 20MHz wide channel. In addition to the indoor trials, a series of outdoor experiments were conducted with the array at a height of around 20 metres. This enabled far field array characterisation, multi-element handset performance as well as experiments to improve the understanding of the massive MIMO radio channel under mobile conditions to be carried out. Mark Beach, Professor of Radio Systems Engineering in the Department of Electrical and Electronic Engineering and Manager of the EPSRC CDT in Communications, explained: "We are delighted to be collaborating with BT. Massive MIMO is a key technology for 5G and the research team's achievements last year with massive MIMO arrays, which are cellular base stations with more than 100 antennas, demonstrates that this technology could deliver ultra-fast data rates to high densities of smartphones and tablets." Professor Tim Whitley, Managing Director, Research and Innovation at BT, added: "The BT Labs have a long history of pioneering wireless research, and with the acquisition of EE, we're excited to once again be at the forefront of mobile technology development. Massive MIMO has the potential to significantly boost available data rates in future 5G mobile networks, and we're pleased to be able to explore that potential with leading academics in the field at the University of Bristol." The experimental system uses the same flexible SDR platform from NI that leading wireless researchers in industry and academia are using to define 5G. To achieve accurate, real-time performance, the researchers took full advantage of the system's FPGAs using LabVIEW Communications System Design and the recently announced NI MIMO Application Framework. As lead users, both the Universities of Bristol and Lund worked closely with NI to implement, test and debug this framework prior to its product release. It now provides the ideal foundations for the rapid development, optimization and evaluation of algorithms and techniques for massive MIMO. The state-of-the-art platform was made possible thanks to hardware provided by Bristol Is Open, a joint venture between the University and Bristol City Council that aims to make Bristol the first open programmable city in the world. Spectrum and power efficient wireless communications are core to Bristol University's Communication Systems and Networks (CSN) Group and the EPSRC Centre for Doctoral Training (CDT in Communications as well as to the Department of Electrical and Information Technology at Lund University. The researchers are now processing the data sets and aim to publish their findings in leading journals in the near future as well as adding enhancements to the system in preparation for further trials. The University of Bristol has been collaborating with the University of Lund for several years on wireless research topics. Both universities have contributed to the development and testing of this software suite, as well as writing additional customisations to be used here at BT. The CSN Group was formed in 1985 to address the research demands of the fixed and wireless communications sectors. It combines fundamental academic research with a strong level of industrial application. The Group has well-equipped laboratories with state-of-the-art test and measurement equipment and first-class computational facilities. Recently the Group has joined forces with the University's High Performance Networks (HPN) Group to form the Smart Internet Lab. The EPSRC Centre for Doctoral Training (CDT) in Communications is a state-of-the-art environment for training postgraduates to lead innovative research, future product development and exploitation. The Centre will help to build UK capability in communications engineering by addressing the skills shortage in the sector. It will focus on Future Communications: People, Power and Performance; while communications technology is the enabler, the Centre recognises that it is people who are the creators, consumers and beneficiaries in terms of its broader applications. Lund University seeks to be a world-class university that works to understand, explain and improve our world and the human condition. The University is ranked as one of the top 100 in the world and tackle complex problems and global challenges and work to ensure that knowledge and innovations benefit society. The University has 42,000 students and 7,680 employees and provides education and research in engineering, science, law, social sciences, economics and management, medicine, humanities, theology, fine art, music and drama. Since 1976, NI has made it possible for engineers and scientists to solve the world's greatest engineering challenges with powerful platform-based systems that accelerate productivity and drive rapid innovation. Customers from a wide variety of industries - from healthcare to automotive and from consumer electronics to particle physics - use NI's integrated hardware and software platform to improve the world we live in. LabVIEW, National Instruments, NI and ni.com are trademarks of National Instruments. Other product and company names listed are trademarks or trade names of their respective companies. BT's purpose is to use the power of communications to make a better world. It is one of the world's leading providers of communications services and solutions, serving customers in 180 countries. Its principal activities include the provision of networked IT services globally; local, national and international telecommunications services to its customers for use at home, at work and on the move; broadband, TV and internet products and services; and converged fixed-mobile products and services. BT consists of six customer-facing lines of business: Consumer, EE, Business and Public Sector, Global Services, Wholesale and Ventures, and Openreach. For the year ended 31 March 2016, BT Group's reported revenue was £19,042m with reported profit before taxation of £3,029m. British Telecommunications plc (BT) is a wholly-owned subsidiary of BT Group plc and encompasses virtually all businesses and assets of the BT Group. BT Group plc is listed on stock exchanges in London and New York. How cities work is changing. Bristol Is Open, a joint venture between Bristol City Council and the University of Bristol, is a research infrastructure to explore developments in software, hardware and telecom networks that enable more interaction between people and places and more machine-to-machine communication. The project uses a high performance software defined network as the city operating system, then internet of things platforms and big data analytics feed an emerging number of smart city applications. This is giving people more ability to interact, work and play with the city that they live in, and will help cities address some of the biggest challenges of modern urban life. This is the Open Programmable City.


News Article | February 24, 2017
Site: globenewswire.com

Together with university research partner King's College London, Ericsson (NASDAQ: ERIC) and BT have signed a multi-year collaboration agreement on 5G testing and development. King's College contributes with low-latency use cases and specialized knowledge in communication technologies, robotics and haptic control. The collaboration will focus on creating 5G use cases in commercial and consumer markets, with particular focus on mission-critical services such as medical applications. It will involve research into the technical and economic aspects of key 5G-enabling technologies. With the ambition to be first to market with 5G services in the UK, BT has worked with Ericsson to build a 5G Proof of Concept Center at the BT Labs in Adastral Park, Ipswich. With access to the 5G for Europe core network - linking multiple centers and universities across Europe - Ericsson and BT are testing the network architecture needed to most efficiently deliver commercial 5G services. Howard Watson, CEO, BT Technology, Service & Operations, and BT Group CIO, says: "The initial focus of the collaboration is on Proof of Concept solutions and trials of services needing both high availability and low latency - both key features of the forthcoming 5G technology." In 2016, BT bought EE, the United Kingdom's leading 4G network provider. Together, we have the opportunity to build on our existing infrastructure to create a truly converged fixed and mobile network. We look forward to working with Ericsson and Kings College London as we examine the possibilities of 5G, and what it can deliver in terms of flexibility, scalability and the high bandwidths that our customers will require in the future." Anders Lindblad, Senior Vice President and Head of Business Unit IT & Cloud Products, says:"5G is the foundation for expanding the potential to all Industries.  The cooperation with BT to trial services using 5G technology demonstrates Ericsson's commitment to drive market demand and adoption. By establishing network slices in the context of 5G will be like virtual networks on-demand, and will be crucial for the mission-critical services being trialed." A demonstration of these capabilities will be on display outside Ericsson's Hall 2 at Mobile World Congress. BT's purpose is to use the power of communications to make a better world. It is one of the world's leading providers of communications services and solutions, serving customers in 180 countries. Its principal activities include the provision of networked IT services globally; local, national and international telecommunications services to its customers for use at home, at work and on the move; broadband, TV and internet products and services; and converged fixed-mobile products and services.  BT consists of six customer-facing lines of business: Consumer, EE, Business and Public Sector, Global Services, Wholesale and Ventures, and Openreach. For the year ended 31 March 2016, BT Group's reported revenue was £19,042m with reported profit before taxation of £3,029m. British Telecommunications plc (BT) is a wholly-owned subsidiary of BT Group plc and encompasses virtually all businesses and assets of the BT Group. BT Group plc is listed on stock exchanges in London and New York. Anything can happen on the digital frontier, a promising but undiscovered future. From February 27 to March 2 in Barcelona, Spain, Ericsson is demonstrating a collaborative approach and innovative solutions to succeed in this arena. With our customers and partners, we work across industries, physical boundaries and perceived limitations. Join us in Hall 2 or online during MWC 2017 and engage in conversations and demonstrations about our favorite things: 5G; platforms and services for IT, Cloud, Networks and TV & Media; connected solutions for industries; the Internet of Things; and partnering for success. See you there! Ericsson is a world leader in communications technology and services with headquarters in Stockholm, Sweden. Our organization consists of more than 111,000 experts who provide customers in 180 countries with innovative solutions and services. Together we are building a more connected future where anyone and any industry is empowered to reach their full potential. Net sales in 2016 were SEK 222.6 billion (USD 24.5 billion). The Ericsson stock is listed on Nasdaq Stockholm and on NASDAQ in New York. Read more on www.ericsson.com.


Saffre F.,Khalifa University | Gedge R.,Adastral
2010 IEEE/IFIP Network Operations and Management Symposium Workshops, NOMS 2010 | Year: 2010

Efficient Demand Response or Demand-Side Management (DSM) has long been one of the key aspirations of the Energy Sector. In Smart Grids, there could be many opportunities for semi-automated DSM, assuming proper coordination (i.e. de-synchronization) mechanisms are in place. In this paper, we present the results of a simulation study that was carried out to outline the potential benefits and sketch the key ICT requirements for DSM in Smart Grids. Our preliminary findings indicate that a simple, centralized reactive pricing scheme could be implemented with an acceptable communication overhead, but also suggest high computational needs. © 2010 IEEE.


Borghesani A.,Adastral
European Conference on Optical Communication, ECOC | Year: 2010

State of the art semiconductor optical components, suitable for next generation Access network will be investigated, in particular focusing on their suitability for low cost, mass deployment networks. ©2010 IEEE.


Hessey S.,Adastral
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2015

Large consumer-facing enterprises can offer a wide range of products and services to their customers. In parallel, often the quantity of information offered online to customers to support these services is similarly large in scale–so how can an enterprise optimize online support to improve customer satisfaction and lower support costs to the business? To address this problem we have used quantitative and qualitative methods to identify the most significant topics concerning customers over a 14-week period. These analyses in turn informed our user test design, which investigated individual search-for-help behaviors. The output from these analyses was used to form recommendations for high-priority, low cost interventions in the User Interface design of the support website, so that customers are more willing and able to help themselves. © Springer International Publishing Switzerland 2015.


Nekovee M.,Adastral | Nekovee M.,University College London
International Journal of Digital Multimedia Broadcasting | Year: 2010

Cognitive radio is being intensively researched as the enabling technology for license-exempt access to the so-called TV White Spaces (TVWS), large portions of spectrum in the UHF/VHF bands which become available on a geographical basis after digital switchover. Both in the US, and more recently, in the UK the regulators have given conditional endorsement to this new mode of access. This paper reviews the state-of-the-art in technology, regulation, and standardisation of cognitive access to TVWS. It examines the spectrum opportunity and commercial use cases associated with this form of secondary access. Copyright © 2010 Maziar Nekovee.


Grant
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase I | Award Amount: 148.51K | Year: 2013

ABSTRACT: Adastral is proposing an innovative approach to the development of a low cost retrofittable head up display. We have designed a optical system with a minimal number of elements that can readily be reconfigured to fit multiple cockpits without modifying the core optical elements. It meets the requirement to reduce power space and cooling by 25% compared to current HUDs. Our Phase I study will survey the available state of the art in HUDs and components, and will match the modular design to the required cockpits. We will also study the fit into the cockpits to maximize the available field of view and at the same time match the required eye motion box and other specific airplane cockpit requirements. This will include matching any collimation and bird strike specific requirements. BENEFIT: This modular HUD will fit a low-cost HUD into the full range of tactical aircraft, with a significant improvement in reliability, and a reduction in acquisition and life cycle costs.


Grant
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase I | Award Amount: 149.30K | Year: 2015

ABSTRACT:Adastral LLC is submitting a proposal in response to the F151-103 Shock Hardened Laser Targeting System. We will offer a compliant solution to the hardened seeker requirement, using some off-the-shelf components. Our system will be designed within a 40mm diameter package, and will be compliant with the STANAG standards. First we will finalize the design and performance criteria, then create a new design, with its emphasis on the need to avoid degradation of the warheads explosive effects upon impact, and to track a target early enough in its flight path to enable a tracking solution. Detailed performance predictions will include maximum acquisition range and off-boresight angular capabilities. Additionally we will define how we intend to address the requirement for new advanced coding schemes at the defined wavelengths. Once the outline architecture and design are determined, we will study how to harden the seeker to the required level. During the Phase I performance period we will demonstrate the concepts compatibility with standard designators, including those that have been hardened or suitable for use on a lightweight UAVBENEFIT:Adastral LLC is submitting a proposal in response to the F151-103 Shock Hardened Laser Targeting System. We will offer a compliant solution to the hardened seeker requirement, using some off-the-shelf components. Our system will be designed within a 40mm diameter package, and will be compliant with the STANAG standards. First we will finalize the design and performance criteria, then create a new design, with its emphasis on the need to avoid degradation of the warheads explosive effects upon impact, and to track a target early enough in its flight path to enable a tracking solution. Detailed performance predictions will include maximum acquisition range and off-boresight angular capabilities. Additionally we will define how we intend to address the requirement for new advanced coding schemes at the defined wavelengths. Once the outline architecture and design are determined, we will study how to harden the seeker to the required level. During the Phase I performance period we will demonstrate the concepts compatibility with standard designators, including those that have been hardened or suitable for use on a lightweight UAV

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