Electrical and Information Technology

Faculty of Engineering LTH | Lund University

News archive

Lecturing-baton passed from Mats to Vincent.

Published: 2016-09-15

Text and photo: Anders Borgström


Professor Buon Kiong Lau (Vincent) from EIT has been appointed as a Distinguished Lecturer (DL) of IEEE Antennas and Propagation Society (AP-S) for the three-year term 2017-2019. Every year, a number of people who are eminent in the Society's field of interest, are selected to be DLs. This year, Vincent was selected together with two other experts: Prof Karu Esselle and Prof Carey M. Rappaport. DLs are financially supported to visit active so called AP-S Chapters around the world and give talks on topics of interest and importance to the AP community.   

EITs other professor within this field, Mats Gustafsson, has been a DL between 2013-2015, and Vincents appointment can be seen as a continuation of our department’s involvement in this respected scientific role. Vince is passing on the baton to Mats. 

A short discussion with Mats gives the following picture of what IEEE distinguished lecturing is all about.

-I did my last lectures about a year ago, says Mats. Every IEEE has its own chapters and sections where AP (Antenna & Propagation) and MTT (Microwave Theory & Techniques) are now chaired by Mats and in that role, he can invite DLs for talks at swedish universities. There is a quote system for how many DLs can be invited where IEEE pay for the expenses (T&L etc). 

-EIT hosted a few lecturers last spring talking about radar and compressed sensing and also  some workshops where arranged, Mats continues. -Each organisation or chapter appoints DLs where we can get in touch and ask for DLs visiting us. Our contribution is to decide a day, host them at our premises, inviting listeners and being nice to them. No cost or arrangement otherwise.

When Mats was a DL himself, he was invited to Brisbane University in Australia because his research is well-known there and in otehr places down-under. They passed the message and got in touch with other sections in Australia who also booked him up. 

-I went on a 10-day lecturing tour including visits to Brisbane, Sydney, Melbourne, Adelaide and also Singapore on the way back home. -Very intense! Other "touchdowns" during his DL-period has been, among other countries, US and India and even though it's highly scientific fields the audience can vary a lot both in terms of knowledge base and numbers. 

-It can be a "standard" seminar like our own internal EIT ones with 30 highly skilled listeners up to a small India university where all undergraduate students also attend counting to an overalla audience of 200 persons. -It's dynamic, says Mats. -You also need to be able to quickly adapt the abstraction level of your talks. -It's good fun and you build networks but also learn a lot about other university cultures and how they run both research and education.

The baton is passed from Mats to Vincent and we wish him successful lectures coming up and new insights in the global university world. 

More information about the Distinguished Lecturer Program is found here



Multiple awards to spectrum world champions

Published: 2016-08-09

Core EIT-team behind the Massive MIMO LuMaMi-testbed: Senior researcher Liang Liu, PhD-student Steffen Malkowsky, PhD-student Joao Vieira, Professor Ove Edfors. Missing in picture: Professor Fredrik Tufvesson. 


Text and photo: Anders Borgström.

EITs 5G Massive MIMO researchers are best in class for sure! Doctoral student Steffen Malkowsky together with his research colleague Paul Harris from University of Bristol grabbed a real grand-slam at the 2016 NI Engineering Impact Awards ceremony in Austin, Texas, in the beginning of August.  This event attracted more than 3,200 innovators, with thousands more watching the keynote events around the world over live streaming


Five awards

Steffen Malkowsky and Paul Harris won first prize in five separate categories in fierce competition with more than 100 other contributions. An absolutely incredible achievement! Steffen together with his Lund team-mates PhD-student Joao Vieira and senior researcher Liang Liu have all worked extremely hard during a long time to develop a Massive MIMO testbed. This hard work is now being so gracefully rewarded for the world record performance in spectral efficiency obtained using the University of Bristol instance of the testbed. Main supervisors of the Lund part of the project are professors Ove Edfors and Fredrik Tufvesson.

The five categories scooped by Steffen and his Bristol colleague Paul were the following: 

-NI's Wireless and Mobile Communications category
-NI's Engineering Grand Challenges Award
-Hewlett Packard Enterprise (HPE) Edgeline Big Analog Data Award
-Powered by Xilinx Award
-2016 Customer Application of the Year Award

Fortunately they didn't need any extra baggage allowance on the flight home, since NI gracefully offered to ship the five heavy trophies to Lund after the event. Check the happy team yourself in this award ceremony video.


Spectral efficiency, what's that all about?

What is spectral efficiency? Well it's about what data rate that can be achieved over a given bandwidth in a specific communication channel. Or how efficiently a limited frequency spectrum is used in terms of transmitting data.  To put it simple: -How much data can be packed in an existing radio signal.

Spectral efficiency measurement unit is bits/sec/Hz and the competition is about showing the highest values. Steffen and his colleagues have boosted massive MIMO to an incredible world record of 145.6 bit/sec/Hz. Using a 20 MHz channel this means a throughput of 3 Gbit/sec, beating by far both 4G and LTE current performances. The 145 bits/sec/Hz-world record is illustrated in this video brought forward by the team at Bristol University who also issued this pressrelease on the subject.


Ove Edfors in keynote

At the day 2 keynote presentations EIT professor Ove Edfors and Professor Andrew Nix at University of Bristol entered the large NI Week-stage and gave the big audience a brief presentation of the uniqueness of the Massive MIMO system principles and how it's now been  showed to perform so well together with key hardware and software components from National Instruments. Among other things, the key-note video informs about Massive MIMO systems usage of not only time and frequency domains but also the spatial domain in order to share spectral resources between different users. The work on designing the massive MIMO testbed has allowed Lund University researchers to publish the first papers on real time Massive MIMO over the air. Real results with real hardware, software and prototypes. 

Ove has also earlier made a 2 min excellent video animating and describing the fundamental principles of Massive MIMO using one basestation and three terminals. 


Paving the way for 5G

SteffenPaul, and the rest of Lund-Bristols Massive MIMO research teams are among the most important players in bringing future 5G technologies in place. Next step is to study how the system works when the connected units are mobile. Test will be performed in collaboration with the Bristol-team later on this fall in Lund. 

Congratulations to SteffenLiangJoao and others involved at EIT!



Erik Larsson på Kunskapskalas

Published: 2016-08-08

Erik Larsson, docent på EIT, deltog som föreläsare på Folkuniversitets arrangemang Kunskapskalaset under Helsingbogsfestivalen HX16 som gick av stapeln 4-6 augusti. Erik levererade kunskap till kalasande besökare om IT-beroende och dess risker i vårt samhälle. Nuförtiden finns det elektronik inte bara i mobiltelefoner och datorer utan i stort sett i varenda pryl. Självklart vill vi att elektroniken ska fungera så länge vi använder den, men det är inte så enkelt när en enda integrerad krets kan bestå av 10 miljarder transistorer där ledningarna är bara cirka 20 nanometer. Mycket kan gå fel.

Läs mer om HX16



Lund University breaks the world record for transistor performance

Published: 2016-06-23


A team from Lund University has developed transistors with a new world record of performance. The improved performance can be translated to a reduction of power consumption in computer and mobile devices, allowing for new features, more memory and longer battery life time.

The transistor is the smallest constituent of computer processors (CPUs) and memories (RAMs), and the continued development of it, since its invention in 1959, has ushered in the digital era.

“The primary transistor performance metric is the amount of current that is able to pass through the transistor under a certain voltage. This, in turn, depends on many factors, such as material properties and device design”, says Cezar Zota, who presented the work together with Erik Lind, at the 2016 Symposia on VLSI Technology and Circuits in Honolulu, Hawaii.

With improved transistor currents, the voltage powering them can be lowered, so that the current falls down to the minimally required level. The net gain is a reduction of the power consumption of the circuit which implements the transistors.

“In our research, we use so-called III-V compound semiconductors, rather than the silicon-based alloys used in industry. III-V materials have the potential of improving transistor performance, but also present new challenges to be solved”, says Cezar Zota.

With these results, Lund University now holds the world record in transistor performance, beating stiff competition from both academy and industry.


Text and Picture: Erik Lind


A new take on asleep and awake

Published: 2016-06-22

-Congrats Nafiseh! You are a doctor! Tell us, did you have a nice party after the duties during the big day? -We had a dinner but no big party. Maybe later... Now it's relax and vacation time. It's been a tough spring.

Preparing for thesis presentation

The field

Assistant Professor Sofie Pollin, KU Leuven, Belgien opened the event and the well attended E:1407 learned that modern wireless sensor devices are often constrained by batteries that determines the size of the device. Even though the nodes in a networked sensing system are mostly asleep and doing nothing, they have to wake up now and then. Waking up and checking activity consumes power which also goes for the processing and sending of data. Finding clever approaches on scalable, powertight wake-up schemes for wireless sensing systems is what our latest doctor Nafiseh Seyed Mazloum has been occupied with in her PhD-research.


Opponent Sofie Pollin (left) and Nafiseh Seyed Mazloum (right). 

Nafiseh presented her thesis  "Duty-cycled Wake-up Schemes for Ultra-low Power Wireless Communications" and talked about network topology, data traffic, cross-layer communication protocol solutions and more, all targetting extremely powertight wireless sensing networks.

Dinner talk

Nafisehs approach to describe her research in a popular way is the following:

-Whenever you have a very small resource of anything, you want to use it efficiently. -My research addresses very small devices like pacemakers, hearing aids etc. Things that need to communicate without having a lot of battery. That's what I work on. This way of putting it usually works at a dinner conversation. -It's a bit like telling someone that you should switch off your mobile phone screen to make the batteries last longer. If the listener wants to know a little bit more, I continue with "standby-mode" and explain that entering this is done autonomously and not by a press of a button.

Nafiseh and LTH Dean Viktor Öwall

Tech talk

-DCW, or spelled out as "Duty-Cycled-Wakeup" means that you send your receiver to standby-mode in duty-cycles where it's on for a period and off for another, says Nafiseh. -Waking it up needs to be done autonomously since noone human is there to do so. Energy consumption also relate to communication delay so when sleep-time is long, the communication is delayed. -And duty-cycle settings depend on application and use cases, she tells us.

On the opponents question why a 65 nm process is used to verify the functionality of the circuits and not something more state-of-the art, Nafisehs opinion was clear.

-Well, whether to use older or newer technologies can always be discussed but I used the technology that was easily available at the time of testing. The focus of my particular research was not on state-of-the-art CMOS-technology, rater on proof-of-concept of the wake-up functionality. 

From engineering in Teheran to research in Lund

Nafiseh worked as a hardware engineer in Teheran and then moved to Sweden 11 years ago where she did her master studies and PhD. The master thesis however, was performed at Philips research in the Netherlands. It all ended up with a PhD-position at LTH. The background in low-power electronics was a good match for this and Ove Edfors has been her supervisor (a very good one) ever since.

Supervisor Ove Edfors and Nafiseh Seyed Mazloum

Swedish integration going on

Nafiseh is now looking for new opportunities, probably in a research institute or similar. Engineering in industry is over and done with for the time being. -Sweden is nice, I'd like to stay here, she says. -And living in Lund represents a cosy lifstyle. -My swedish will improve now when I've more time, she promises.

Congratulations Nafiseh.

Art and sport during leisure hours

Any life outside work? -Yes! Painting in watercolour and also consuming any type of art. Visiting Louisiana Museum of Modern Art in Denmark is a must at least once a year. And I do like exercising in any kind of sport even though on an amateur level. But trying to keep in shape is important for me.

Gender balance potential

An encouraging fact with your disputation is that we saw a female opponent, two women in the committee and last but not least you defending your thesis. Pretty good marks on gender balance in this case compared to most disputations in our area! Gender balance is addressed more and more in the society on all levels and we know that there is a lot of talk but not always much walk-the-talk. How would you say LTH/EIT perform? -I've enjoyed my time and colleagues at EIT a lot but we are not champions in this particular sport. Nafiseh ends the conversation by diplomatically mentioning that there is potential to build a good culture here. As long as there is will.

Congratulations from EIT and good luck in the future!

Text and Picture: Anders Borgström


Anders Karlsson tar guld i institutionsgolfen

Published: 2016-06-14

Anders Karlsson tar guld i institutionsgolfen

Årets institutionsmästerskap i golf avgjordes torsdagen den 9 juni i strålande sol på fantastiskt fina Erikstorpsbanan, Landskrona GK. Efter en hård batalj kunde fyra medaljörer koras efter förnämliga insatser. De fyra är:

Guld och institutionsmästare: Anders Karlsson
Stora silver: Ulf Körner
Lilla silver: Richard Lundin
Brons: Bengt Mandersson

Några highlights:

Hål 3: Richard sätter en lång putt och får  fyra poäng på hålet. Det är dagens högsta poäng. Grattis till denna prestation Richard!

Hål 10: Skyltarna för väganvisningar är inte de bästa och det gör att förvirring ibland uppstår i ledarbollen. I bollen efter ledarbollen går en grupp av fyra damer som från och med hål 10 ser som sin uppgift att hjälpa ledarkvartetten med orienteringen. Så fort tvekan uppstår kommer därigenom en dam resolut rusande över fairway och ger instruktioner. Mycket praktiskt.

Hål 13: Anders slår ut först och får till en lång men mycket slicad drive och hamnar i ett svårt läge, på tok för långt till höger om fairway. Ulf slår ut som andreman och även han slicar grovt och hamnar långt till höger om fairway. De båda herrarnas lägen förbättras dock väsentligt när Bengt förklarar att de slagit ut mot fel fairway. Det slutar med ett par för Anders och en bogey för Ulf.

Hål 14: Birdie från damtee av Ulf Körner! Ulf slår i vattnet på detta svåra par tre hål. Han droppar på damtee, med ett slags plikt, slår upp bollen på green och sätter en 10 metersputt.

Hål 15: Richard hålar ut efter 12 slag. Dagens högsta siffra. Heder åt Richard för att han minsann inte ger upp i första taget!

Efter avslutad tävling avnjöt de fyra pristagarna en fantastisk lunch på Erikstorps Kungsgård med Kokt rimmad kalvbringa med kräm på örter, vårprimörer i dillsmör och potatispuré. Erikstorps Kungsgård ligger i direkt anslutning till golfbanan. Även icke-golfare kan rekommenderas denna pärla.



LuMaMi on SVT

Published: 2015-05-06

Fredrik Tufvesson interviewed by SVT (Swedish Television) regarding the next generation of (wireless) Internet.

See the interview here (in Swedish):


Text: Johan Cedervall


Page Manager: |