Electrical and Information Technology

Faculty of Engineering LTH | Lund University

Ove Edfors
Professor, PhD



Project name Funding org
Coding, Modulation, Data Security and their Implementation, 2006-01-01 - 
Digitally-Assisted Radio Evolution, 2011-03-01 - 2016-03-31
DISTRANT. Distributed antenna systems for efficient wireless systems., 2010-02-08 - 2016-06-30
For distributed antenna systems, which consist of a central processing unit that performs joint processing of the signals from a very large number of base station/access point antennas, there is currently a severe lack of knowledge regarding many very fundamental issues. In this project, we aim for an interdisciplinary research effort where we will study hardware architectures and hardware limitations as well as theoretical limits of possible network performance. In the first phase, we will develop an initial system design based on state-of-the-art knowledge, derive requirements on hardware and algorithms and create a test range for propagation channel studies. In the second phase, we will design and implement low cost RF heads and FPGA hardware, design algorithms based on propagation channel models from the first phase and ultimately evaluate the full system performance in our test range. The expected project outcomes are: 1) Network deployment guidelines for indoor and outdoor cellular and wireless systems when using distributed antenna systems; 2) Suitable hardware architectures and designs for low cost distributed antenna systems; 3) Low complex base band solutions for centralized processing; and 4) Propagation models for distributed antenna systems or large arrays.
Lågkomplex beräkning av linjära förkodare för mycket stora MIMO system, 2012-01-01 - 2014-12-31
En amerikansk forskare, Thomas Marzetta, vid Alcatel-Lucent Bell Labs har nyligen påvisat mycket intressanta egenskaper för trådlösa kommunikationssystem, där man medvetet använder ett mycket stort antal antenner på basstationerna. Dagens basstationer har något fåtal antenner, medan de i det nya förslaget föreslås ett "obegränsat" antal antenner. Detta är naturligtvis inte möjligty i praktiken, men rent teoretiskt får man mycket intressanta egenskaper med "obegränsat" antal antenner. Exempelvis försvinner tidigare begräsningar i kommunikationen från brus och variationer i radiokanalen. Dessutom går energiåtgången per överförd databit i dessa system mot noll. Även om dessa egenskaper är framräknade för orealistiska förutsättningar, pekar angreppssättet ut en mycket intressant väg framåt mot nya typer av trådlösa kommunikationssystem, där man genom att använda mycket flera antenner än idag kan uppnå ett antal fördelar. Exempelvis kan man redan vi ganska så begränsade antal antenner (några tiotal i vissa fall) väsentligt underlätta den processningskraft som behövs för att koda signalerna i dessa system. Genom att lägga systemets komplexitet i antalet antenner, kan andra delars komplexitet reduceras istället. Exempelvis börjar enkla linjära kodningstekniker att fungera lika bra som de mycket komplexa och olinjära metoder som behövs vid ett lägre antal antenner. Det är inom detta område som detta projekt kommer att arbeta. Huvudfrågan som ställs är: Hur kan man med en låg beräkningskomplexitet uppnå en så stor systemprestanda som möjligt, givet att vi har tillgång till många antenner i vår basstation. Vilka avvägningar måste göras mellan olika komplexiteter (bräkningskomplexitet, stora antennarrayer, osv.) och i vilka situationer och miljöer fungerar det här sättet att öka systemes prestanda.
MAMMOET, MAssive MiMO for Efficient Transmission, 2014-01-01 - 2016-12-31
The Internet of the future will to a large extent rely on mobile networks. Mobile data grew with 70% in 2012 and is predicted to grow 13-fold in the next 5 years. This puts very high demands on the development of mobile access technology. MAMMOET will advance the development of Massive MIMO (MaMi), a new and most promising direction in mobile access. MaMi makes a clean break with current technology by using several hundreds of base station antennas that operate phase-coherently together, simultaneously serving many tens of low-complexity single-antenna terminals in the same time-frequency resource. MAMMOET will demonstrate that MaMi can increase both data rates and the overall spectral efficiency by up to ten times, while decreasing the transmitted radiofrequency (RF) power by many orders of magnitude. Other benefits of MaMi include the extensive use of inexpensive low-power components, reduced latency, simplification of the multiple-access layer, and robustness to interference. The drastically reduced emitted RF power can reduce the total energy consumption of a mobile network, when implemented with simple, low power hardware developed in MAMMOET. Consequently, MaMi can, with proper system design, facilitate entirely new deployment scenarios, with wind or solar powered base stations. MAMMOET will substantially contribute to the development of practical MaMi systems and secure a leading position for European industry in its exploitation. Specifically, MAMMOET will investigate the practical limitations of MaMi, and develop complete technological solutions leveraging on innovative low-cost and drastically more efficient and flexible hardware.The academic and research institute partners in MAMMOET include pioneers in MaMi and groups with extensive experience in circuit design for wireless communications. The industrial partners are leaders in their fields and cover the entire chain from component manufacturing to system development and service provisioning.
EU (FP7)
VINNOVA Industrial Excellence Center - System Design on Silicon, 2008-01-01 - 2017-12-31
The Industrial Excellence Center in System Design on Silicon (SoS) covers four areas of circuits design: RF/analog, mixed-signal, digital, and emerging technologies. SoS is also part of a larger research environment, combining basic, applied, and industry related research projects. Additionally, SoS has a strong connection to other research areas at Lund University, e.g. radio systems, information theory, electromagnetic theory, signal processing, and solid-state physics. SoS has been active since 2008, and has continuously strengthened its profile as a well-known research center through both academic production and technology transfer. Research projects are planned with the industrial partners, and new ideas are continuously conceived, exchanged, and evolved. SoS is established as an internationally recognized research environment and the results of the research are represented in the most prestigious conferences and journals in the field e.g. ESSCIRC, ISSCC and JSSC.


Project name Funding org
Mobile Wireless Access to Fixed Networks, 2000-01-01 - 2008-12-31
My Personal Adaptive Global NET and Beyond, 2006-01-01 - 2008-06-30
MAGNET Beyond is a worldwide R&D project within Mobile and Wireless Systems and Platforms Beyond 3G.
EU (FP6)
Power Aware Communications for Wireless OptiMised personal Area Networks, 2002-01-01 - 2005-12-31
PACWOMAN is aiming at developing enabling technologies for Personal Area Networks.
EU (FP5)
Scalable Multi-tasking Baseband for Mobile Communications, 2008-01-01 - 2010-12-31
EU (FP7)
Using WLANs for indoor surveillance, 2006-01-01 - 2007-12-31
WIreless interference-Limited high-throughput Access Technologies and applicatIons, 2008-01-01 - 2010-12-31