Sreda, 21.11.2001., 14.30 časova, sala 1/0
PREGLEDNO PREDAVANJE PO POZIVU
(predavanja - zip-ovano 1,39MB)
Prof.dr Branka Vučetić, Univerzitet u Sidneju, Australija / ETF Bgd
SPACE-TIME KODOVI
The demands for cost-efficient provision of mobile multimedia services are driving recent developments in telecommunications. As multimedia services generally require much higher data rates and quality of service (QoS) than the existing wireless technology can provide, the imperative is to use scarce radio resources more efficiently. Recently, it has been demonstrated that multiple-input multiple-output (MIMO) systems have the capacity proportional to the minimum number of transmit and receive antennas, under some idealized propagation conditions. This result promises very high spectral efficiencies compared to the existing cellular and wireless LAN systems and poses some practical challenges to design codes that can approach this theoretical capacity limit.
In this lecture we present an overview of fundamental capacity limits for wireless communication systems, the principles of design of a novel class of coding schemes, known as space-time (ST) codes, which have a potential to approach these theoretical capacity limits. We also compare the main space-time coding techniques on the basis of their error performance and sensitivity to antenna correlations. Applications of space-time coding schemes to wireless communication systems are also discussed.
Četvrtak 2
2.11.2001., 9.00-18.00 časova, sala 7/II spratCELODNEVNI STRUČNI SEMINAR
Prof.dr Branka Vučetić, Univerzitet u Sidneju, Australija / ETF Bgd
SPACE-TIME KODOVI
(za studente postdiplomskih i redovnih studija i druge zainteresovane specijaliste)
(predavanja - zip-ovano 1,39MB)
Elektrotehnički fakultet u Beogradu – Katedra za telekomunikacije, u saradnji sa Društvom za telekomunikacije, organizuje celodnevni stručni seminar za diplomirane inženjere koji žele usavršavanje u oblasti planiranja savremenih i budućih radio-mreža, zatim za studente
postdiplomce i studente završnih godina telekomunikacionih usmerenja.U toku seminara biće izloženi novi savremeni rezultati u vezi sa klasom takozvanih “Space/Time” kodova koji su pogodni za radio-mreže većih kapaciteta i sa boljim kvalitetom servisa (QoS). Predavač prof. dr Branka Vučetić je istaknuti istraživač sa brojnim svetski vrednim rezultatima upravo u oblasti kodova i savremenih radio mreža. Sadržaj kursa i biografija predavača mogu se videti na Internet sajtu
www.telfor.org.yu/stokodovi.html.Studenti devetog semestra smera za telekomunikacije ETF i studenti postdiplomci koji su upisani na PDS telekomunikacione smerove na ETF u Beogradu, mogu (uz saglasnost šefa smera) da polažu ispit iz gradiva koje će biti izloženo u toku seminara, pri čemu će odgovarajući položeni ispit biti priznat kao ispit jednog od izbornih predmeta devetog semestra redovnih studija ili kao ispit jednog od izbornih predmeta odgovarajućeg telekomunikacionog smera postdiplomskih studija.
Space-Time Coding for High Speed Wireless Communications
COURSE OUTLINE
Focus
Future wireless communication systems need to respond to high capacity demands driven by Internet and multimedia applications. The capability of the wireless and mobile hardware is lagging behind the capacity needs. The key to achieving the required rates in a highly limited radio spectrum is in applications of novel transmission techniques which offer dramatic improvements in spectral efficiencies and transmission reliability relative to the standard systems. Space-time coding is an example of a signalling technique which simultaneously offers a coding gain, spectral efficiency and diversity improvement.
The objective of this course is to present a treatment of key issues involved in theoretical capacity limits of multiple-input multiple-output (MIMO) wireless channels and design of space-time coding techniques which are capable of approaching these limits. A comprehensive coverage of space-time coding techniques, performance studies, implementation issues and applications is given. The course exposes the participants to sufficient detail and background information upon which the required expertise can be built.
The first part of the course is devoted to the discussion of the fundamental MIMO channel capacity limits and how are these limits compromised in real systems by antenna correlation and degenerate propagation conditions. A number of examples based on simulations and real system measurements is given to support the capacity estimations. Furthermore, we introduce transmission diversity concepts and set the scene for space-time coding. The principles of design of block space-time codes are presented followed by the performance analysis and simulation results.
The second part covers the fundamentals of space-time trellis coded modulation (STTCM), performance analysis, code design, simulation results and discussion and comparison of various design techniques in different propagation environments. It continues with a treatment of space-time turbo codes, design of component codes, iterative decoding algorithms and examples.
The third part will focus on layered space-time code structures, performance analysis, design methods, interference suppression techniques and simulation studies under various channel conditions. A number of structures will be considered, ranging from the uncoded Bell Labs Layered Space-Time (BLAST) techniques, to layered codes with convolutional and low density parity check codes as component codes. Efficient multiuser techniques for interference cancellation will be presented and compared. Finally, applications in wireless systems will be addressed.
Who Should Attend
The course is intended for the community of technical professionals involved in the design and planning of telecommunications networks, postgraduate and final year undergraduate students.
Assumed Understanding
Familiarity with the basic concepts of digital communications, probability theory and error control (undergraduate level) is assumed.
Schedule
Part One
Part Two
Part Three
Course Presenter
Prof Branka Vucetic
Biography
Branka Vucetic received the BSEE, MSEE and PhD degrees in 1972, 1978 and 1982, respectively, from The University of Belgrade, Belgrade.
She is the Director of The Telecommunications Laboratory and Professor in Telecommunications at Sydney University Electrical Engineering in Sydney, Australia. At present she is a Visiting Professor at Centre for Telecommunications Research at King's College London. Her research interests include wireless communications, digital communication theory, coding and multiuser detection.
In the past decade she has been working on a number of industry sponsored projects in wireless communications and mobile Internet. She has taught a wide range of undergraduate, postgraduate and continuing education courses worldwide.
Prof Vucetic published three books and more than one hundred and fifty papers in telecommunications journals and conference proceedings.
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