423 Dr Mosa Ali Abu-Rgheff Reader in Mobile Communications, University of Plymouth

Vehicle Ad hoc Networks (VANET) provide safety on the road and deliver road traffic information and route guidance to drivers along with commercial applications.

<p>Vehicle Ad hoc Networks (VANET) provide safety on the road and deliver road traffic information and route guidance to drivers along with commercial applications.</p> <p>However the challenges facing VANET are numerous. Nodes move at high speeds, road side units and base-stations are scarce, the topology is constrained by the road geometry and changes rapidly, and the number of nodes peaks suddenly in traffic jams.</p> <p>In this talk, I will focus on issues related to the physical and link layers of VANET to achieve high data rates and high throughput.</p> <p>For the physical layer, we examine the use of multiple antennas installed on top of the vehicles structured in Vertical BLAST (VBLAST) systems to provide higher capacities in rich fading environments. To study the capability of the proposed system, a vehicular channel model was developed from a rich scattering environment.</p> <p>However, the performance of VBLAST system drops as the line of sight strength increases due to the correlation between the antennas. The analysis of VLAST-OFDM systems showed that they experience an error floor due to intercarrier interference (ICI) which increases with speed, number of antennas transmitting and number of subcarriers used.</p> <p>The IEEE 802.11p MAC layer standard, under development for VANET, uses a variant of Carrier Sense Multiple Access (CSMA). IEEE 802.11 protocols were evaluated to prove the saturation throughput of the basic access method drops as the number of nodes increases thus yielding very low throughput in congested areas.</p> <p>RTS/CTS access provides higher throughput but it applies only to unicast transmissions.</p> <p>To overcome the limitations of 802.11 protocols, we designed a protocol known as SOFT MAC which combines Space, Orthogonal Frequency and Time multiple access techniques. In SOFT MAC the road is divided into cells and each cell is allocated a unique group of subcarriers. Within a cell, nodes share the available subcarriers using a combination of TDMA and CSMA. The throughput analysis of SOFT MAC showed it has superior throughput compared to the basic access and similar to the RTS/CTS access of 802.11.</p> 2010-05-18 12:00:00 Tuesday Tue 18 May May 05 2010 12 00 2010-05-18 13:00:00 Tuesday Tue 18 May May 05 2010 13 00 Tuesday 18 May 2010, 1200-1300 0 0 C60 InfoLab21 2 Talk, Lecture or Seminar Talks, Lectures and Seminars <p>An opportunity to hear about the latest research by invited experts in their field. All are welcome to attend.</p> 429 Professor Gregory Kabatyanskiy Institute for Information Trnasmission Problems, RAS, Moscow

In this talk we prove initial results on the proportion of "mutated" coordinates that can be tolerated under the IPP property. The talk is based on a joint work with A. Barg, G.R. Blakley and C. Tavernier.

<p>In this talk we prove initial results on the proportion of "mutated" coordinates that can be tolerated under the IPP property. The talk is based on a joint work with A. Barg, G.R. Blakley and C. Tavernier.</p> <p>An n-word y over a finite alphabet is called a descendant of a set U of t words (called "parents") if each coordinate of y coincides with the same coordinate of at least one of these t words. A code C is said to have the t-identifying parent property (t-IPP) if for any word y that is a descendant of at most t parents belonging to the code it is possible to identify at least one of them. The existence of good t-i.p.p. codes is known from earlier works. </p> <p>We introduce a strong version of this problem under which some of the coordinates in y can break away from the descent rule ("mutate") , i.e., can take arbitrary values from the alphabet, or become completely unreadable.</p> 2010-02-05 13:00:00 Friday Fri 05 February Feb 02 2010 13 00 2010-02-05 14:00:00 Friday Fri 05 February Feb 02 2010 14 00 Friday 05 February 2010, 1300-1400 0 0 InfoLab21 2 Talk, Lecture or Seminar Talks, Lectures and Seminars <p>An opportunity to hear about the latest research by invited experts in their field. All are welcome to attend.</p> 96

A talk by Dr. José Juan Macías Hernández

<p>A talk by Dr. José Juan Macías Hernández</p> <p>Dept. Engineering Chemistry</p> <p>Universidad de La Laguna,</p> <p>Spain</p> <p>Dr. José Macías is currently Head of Process Engineering Department at an Oil Refinery based in Tenerife and Associate Professor in Chemical Engineering at the University of La Laguna, Canary Islands. </p> <p>He has 20 plus years of experience in both industry and academia. In the Refinery, he has being responsible for the design and commissioning of advanced control applications using Multivariable Predictive Control and Expert Systems Applications for Operators guidance. </p> <p>In the university he is responsible for the tuition of Simulation and Optimization of Chemical engineering Processes and Petroleum Technology subjects. </p> <p>He has given several in-house advanced control courses using rigorous dynamic simulation. He is founder of an engineering company dedicates to programming, simulation and control in chemical engineering.</p> <p> </p> <p>His research interest is mainly dedicated to the fields of soft sensors and chemical engineering optimisation.</p> 2009-07-13 14:00:00 Monday Mon 13 July Jul 07 2009 14 00 2009-07-13 15:00:00 Monday Mon 13 July Jul 07 2009 15 00 Monday 13 July 2009, 1400-1500 0 0 C60 InfoLab21 2 Talk, Lecture or Seminar Talks, Lectures and Seminars <p>An opportunity to hear about the latest research by invited experts in their field. All are welcome to attend.</p> 302

This talk will focus on compositional methods for modelling vehicular traffic and on distributed estimation methods for real time traffic systems.

<p>This talk will focus on compositional methods for modelling vehicular traffic and on distributed estimation methods for real time traffic systems. </p> <p>Compositional models describing the evolution of the traffic density, and possibly also of the average speed of traffic, in different sections of a road network, are proposed. Hybrid models - combining discrete event models with very simple continuous evolution equations - allow compact modelling of fairly complicated behaviour.</p> <p>In many cases road traffic controllers will have available a fairly large, but often an inaccurate and unreliable, set of measurements of the traffic state at the current time. Combining the on-line measurements with the compositional models we develop recursive estimators for the traffic state, and detection of faults (sensor faults, or traffic incidents). Particle filtering and other Bayesian techniques can be used. Distributed implementations of the estimation algorithms make possible their application in practice. Finally, these state estimates can be used for on-line control actions, e.g., synchronising traffic in closed loop.</p> 2009-06-25 13:00:00 Thursday Thu 25 June Jun 06 2009 13 00 2009-06-25 14:00:00 Thursday Thu 25 June Jun 06 2009 14 00 Thursday 25 June 2009, 1300-1400 0 0 C60 InfoLab21 2 Talk, Lecture or Seminar Talks, Lectures and Seminars <p>An opportunity to hear about the latest research by invited experts in their field. All are welcome to attend.</p> 31

By <a href="http://www.commsp.ee.ic.ac.uk/%7Epld/">Dr. Pier Luigi Dragotti</a>, Imperial College, London, UK

<p>By <a href="http://www.commsp.ee.ic.ac.uk/%7Epld/">Dr. Pier Luigi Dragotti</a>, Imperial College, London, UK</p> <p>The paradigm of point-to-point communications is well established, and dates back to the seminal work of Shannon. With the recent advances of the sensor network technology, a new paradigm for signal processing and communication is emerging and this will have a dramatic impact on the way we acquire and process signals and the way we transport and reconstruct them.</p> <p>In particular, since sensors are low-power devices and communication bandwidth is critical, there are new trade-offs between accuracy, compression, computation and transmission power that need to be investigated.</p> <p>In this talk, we consider the case of camera sensor networks and discuss the entire signal processing pipeline: distributed data acquisition, distributed data compression and data reconstruction at the receiver. We first introduce the plenoptic function that well models the spatio-temporal structure of the visual data and study its sampling. We then focus on the problem of distributed compression and propose a distributed compression scheme that allows for a flexible allocation of bit-rates amongst the sensors. Finally, the data fusion problem is discussed and new results on image super-resolution and scene segmentation are presented.</p> <p>We also briefly analyze the fundamental trade-offs between the reconstruction fidelity, the number and locations of cameras and the overall compression rate.</p> <p>This is joint work with N. Gehrig (ICL), Jesse Berent (ICL), Loic Baboulaz (ICL), M. Gastpar (UC&Berkeley) and M. Vetterli (EPFL).</p> 2009-06-01 13:00:00 Monday Mon 01 June Jun 06 2009 13 00 2009-06-01 14:00:00 Monday Mon 01 June Jun 06 2009 14 00 Monday 01 June 2009, 1300-1400 0 0 C60 InfoLab21 2 Talk, Lecture or Seminar Talks, Lectures and Seminars <p>An opportunity to hear about the latest research by invited experts in their field. All are welcome to attend.</p> 276

The application of fuzzy logic (FL) and artificial neural networks (ANNs) in modelling and control of complex, non-linear and time-varying processes satisfying the high system performance demands marks recently a considerable progress. The aim of the lecture is to present some basic theory and research results, related with the development and implementation of PI-like fuzzy logic and fuzzy neural controllers.

<p>The application of fuzzy logic (FL) and artificial neural networks (ANNs) in modelling and control of complex, non-linear and time-varying processes satisfying the high system performance demands marks recently a considerable progress. The aim of the lecture is to present some basic theory and research results, related with the development and implementation of PI-like fuzzy logic and fuzzy neural controllers. </p> <p>First, the essence of ANNs and some applications in modelling and control is discussed. Then, fuzzy sets and fuzzy logic are introduced and employed in building PI-like fuzzy logic process controller. Next, the process of anaerobic digestion of organic waste is studied. For this non-linear complex plant: 1) an ANN plant predictor is suggested; 2) a two-level fuzzy logic controller is designed, consisting of a primary fuzzy controller and a supervisory fuzzy controller for autotuning of the scaling factors; 3) a Sugeno ANN is trained on the basis of the fuzzy two-level controller in order to make a simple neural-fuzzy controller (NFC); 4) finally the Sugeno NFC is combined with the ANN plant predictor in the feedback to further improve the control system performance. </p> <p>Results from simulation and real time control using MATLAB facilities are presented and the control system performance estimated and compared with the performance of designed ordinary PI controller system.</p> 2009-02-25 13:00:00 Wednesday Wed 25 February Feb 02 2009 13 00 2009-02-25 14:00:00 Wednesday Wed 25 February Feb 02 2009 14 00 Wednesday 25 February 2009, 1300-1400 0 0 InfoLab21 2 Talk, Lecture or Seminar Talks, Lectures and Seminars <p>An opportunity to hear about the latest research by invited experts in their field. All are welcome to attend.</p> 234

Wireless Video Transmission:

<p>Wireless Video Transmission: </p> <p>from joint source and channel coding to cross-layer design</p> <p>Dr. Maria Martini</p> <p>Senior Lecturer in wireless and mobile communications </p> <p>Faculty of Computing, Information Systems and Mathematics </p> <p>Kingston University </p> <p>Penrhyn Road, Kingston-Upon-Thames</p> <p>London, KT1 2EE, UK </p> <p>Phone: +44 (0) 20 8547 7900 </p> <p>Fax: +44 (0) 20 8547 7972 </p> <p>e-mail: mgmartini@ieee.org </p> <p>m.martini@kingston.ac.uk</p> <p>Abstract:</p> <p>Recently, joint source and channel coding and decoding (JSCC/D) techniques that include a co-ordination between source and channel encoders were investigated, in particular for transmission of audio data, images and video over wireless channels. It was shown that, for wireless audio and video transmission, separate design of source and channel coding is usually not optimal, nor it is always applicable, in particular when transmitting data with real-time constraints or operating on sources whose encoded data bit error sensitivity varies significantly. With joint source and channel coding, the transmission system can be adapted to source characteristics, either at channel coding level or through source adaptive modulation. JSCC/D techniques may require the use of rate/distortion curves or models of the source in order to perform the optimal compromise between source compression and channel protection. Similarly, source compression and resilience can be adapted to channel and network characteristics. Joint source and channel coding involves joint design of the source encoder, at the application layer, and of channel encoder/modulator, at the physical layer. In order to realistically perform JSCC/D, it is thus necessary to allow the flow of information to be exchanged in the transmission system and a cross-layer approach is needed. Cross layer design is a recent further evolution of the concept of joint source and channel coding, targeting at jointly designing the classically separated OSI layers. Characteristics and limits of such approach will be described, together with approaches proposed by the speaker and under study in the WMN group in Kingston University.</p> 2008-10-27 13:00:00 Monday Mon 27 October Oct 10 2008 13 00 2008-10-27 14:00:00 Monday Mon 27 October Oct 10 2008 14 00 Monday 27 October 2008, 1300-1400 0 0 C60 InfoLab21 2 Talk, Lecture or Seminar Talks, Lectures and Seminars <p>An opportunity to hear about the latest research by invited experts in their field. All are welcome to attend.</p> 210

seminar by Prof. Heung-Gyoon Ryu from Chungbuk National University, Korea

<p>seminar by Prof. Heung-Gyoon Ryu from Chungbuk National University, Korea</p> <p>speaker: </p> <p>Position: Professor in the Department of Electrical, Electronic and Computer Engineering, Chungbuk National University, Republic of Korea</p> <p>Prof. Ryu is the recipient of the "2002 ACADEMIC AWARD" from the Korea Electromagnetic Engineering Society (Institute)</p> <p>His fields of Interest include:</p> <p>- New next generation mobile communication, B3G/4G</p> <p>- MIMO system with OFDM for next generation mobile communication</p> <p>- Low Power communication for Satellite and HAPS</p> <p>- Spread Spectrum System , AJ and LPI Technology</p> <p>- Communication Signal Processing.</p> <p>- GPS, WLAN, Mobile Ad-hoc Network, Wireless Sensor Network.</p> <p>- High performance PLL Design and Application</p> <p>- CDMA System Design and Adaptive Modulation System</p> <p>- PLC(power line communication) and Home Networking, etc . . .</p> <p>- </p> <p>From 1988 until now, Professor Ryu has published over 230 papers IEEE and Korea domestic journals, over 50 papers in international and domestic conferences. He has finished or now proceed over 35 research projects from Korea government, ETRI, ADD and Samsung, LG, etc. paper review, book publication, . . .). He graduated 13 Ph.D students and 77 M.S students (2 from Vietnam and 2 from China). Now, He is advising professor of 4 M.S. students and 6 Ph.D students </p> <p>Publication Lists (within recent 5 years):</p> <p>- 24 IEEE and IEE Transaction papers</p> <p>- Submitted papers to IEEE (under review): 32 papers</p> <p>- International conference papers: over 25 papers</p> <p>- Domestic regular journal papers: about 55 papers</p> <p>- Domestic conference papers: about 12 papers</p> <p>- Submitted or registered Korea patents: 16 patents</p> <p>- USA patent : 1</p> <p>- Canada patent : 1</p> <p>- European Patent : 3</p> 2008-08-20 13:00:00 Wednesday Wed 20 August Aug 08 2008 13 00 2008-08-20 14:00:00 Wednesday Wed 20 August Aug 08 2008 14 00 Wednesday 20 August 2008, 1300-1400 0 0 C60 InfoLab21 2 Talk, Lecture or Seminar Talks, Lectures and Seminars <p>An opportunity to hear about the latest research by invited experts in their field. All are welcome to attend.</p> 214

A talk by Jose Antonio Iglesias from the Carlos III University of Madrid (Spain).

<p>A talk by Jose Antonio Iglesias from the Carlos III University of Madrid (Spain). </p> <p>Knowledge about computer users is very beneficial for assisting them, predicting their future actions or detecting masqueraders. Thus, to create and recognize the behaviour profile of a computer user is an interesting task.</p> <p>However, a challenge in this task is how to accurately profile a user while his/her behaviour changes constantly. Thus, a user profile should be frequently revised to keep it up to date. In order to solve this problem, Evolving System can be very helpful.</p> <p>This talk describes a way to create the model of computer user behaviour and classify it using Evolving Systems. In order to tackle this task, computer user behaviour is represented as the sequence of the commands s/he types. This sequence of commands is transformed into a distribution of relevant subsequences in order to find out a profile that defines its behaviour. Then, an evolving system is applied for classifying the profile.</p> <p>Jose Antonio Iglesias is teaching assistant at the Carlos III University of Madrid (Spain). He received his Master´s degree in Computer Science from Valladolid University (Spain). He has several papers about behaviour modelling and classification, especially in two different environments (RoboCup and UNIX User). Related to the RocoCup environment, he participated in the RoboCup Coach Competition 2006 held in Bremen (Germany). His research interests include evolving intelligent systems, modelling behaviour and their applications in real problems.</p> 2008-07-18 13:00:00 Friday Fri 18 July Jul 07 2008 13 00 2008-07-18 14:00:00 Friday Fri 18 July Jul 07 2008 14 00 Friday 18 July 2008, 1300-1400 0 0 C60 InfoLab21 2 Talk, Lecture or Seminar Talks, Lectures and Seminars <p>An opportunity to hear about the latest research by invited experts in their field. All are welcome to attend.</p> 209

The seminar will present theoretical developments in the area of blind source separation (BSS), also known as independent component analysis (ICA).

<p>The seminar will present theoretical developments in the area of blind source separation (BSS), also known as independent component analysis (ICA).</p> <p>BSS and ICA address those situations where mixtures of a set of unknown source signals are available and the problem is to extract the original source signals from these observed mixtures without the knowledge of the mixing matrix.</p> <p>In the case of linear, instantaneous mixtures, the received signals, y, can be written as y = A*x, where x represents the unknown original source signals and A is the unknown mixing matrix. It will be demonstrated that independent source signals can be extracted using higher-order statistics (HOS).</p> <p>BSS and ICA have many potential applications in diverse fields. The seminar will present theoretical developments as well as examples of simulation, demonstration, and real-world examples.</p> <p>speaker:</p> <p>Prof. Asoke K Nandi</p> <p>David Jardine Chair of Signal Processing</p> <p>Department of Electrical Engineering & Electronics</p> <p>The University of Liverpool</p> <p>Brownlow Hill, Liverpool, L69 3GJ, UK</p> 2008-07-10 11:30:00 Thursday Thu 10 July Jul 07 2008 11 30 2008-07-10 12:30:00 Thursday Thu 10 July Jul 07 2008 12 30 Thursday 10 July 2008, 1130-1230 0 0 C60 InfoLab21 2 Talk, Lecture or Seminar Talks, Lectures and Seminars <p>An opportunity to hear about the latest research by invited experts in their field. All are welcome to attend.</p>