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Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Marco Munguia, M. Bengt Mandersson UNI-Asdi-FEC Group Faculty of Electrical Engineering and Computer Science National University of Engineering Signal Processing Group Department of Electrical and Information Technology Lund University

ISBN: (纸本)9781424441211

In this paper, the vascular sounds of the arteriovenous fistula at the anastomosis and five centimeters downstream the anastomosis were analyzed. The analysis of the sounds was based on features extracted from the power spectral density (PSD) and wavelet decomposition. The database consists of 15 recordings at the anastomosis and 15 reference recordings obtained from 15 patients. The results showed that the vascular sounds at the anastomosis can be characterized as an extra energy in the higher frequencies (200-1000 Hz) i.e. higher mean frequency of the PSD than the reference recordings. Moreover, the wavelet decomposition of the anastomosis recordings showed a similar energy pattern, in the finer scales, to that found in studies of arterial and venous stenosis.

关键词： Anastomosis SOUND Arteriovenous Anastomosis Power spectral density Bathymetric observations venous stenosis PSD gene PREVENTION OF SIGNIFICANT DETERIORATION Intermediate frequencies Recordings Analysis Arteries

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MIMO channel modeling and transmission techniques for multi-satellite and hybrid satellite-terrestrial mobile networks

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Physical Communication 2011年第2期4卷 127-139页

作者： Pérez-Neira, Ana I. Ibars, Christian Serra, Jordi del Coso, Aitor Gómez-Vilardebó, Jesús Caus, Màrius Liolis, Konstantinos P. Department of Signal Theory and Communications Universitat Politècnica de Catalunya (UPC) Barcelona Spain Centre Tecnològic de Telecomunicacions de Catalunya (CTTC) Castelldefels Barcelona Spain Multimedia Telecommunications Systems group of Thales Alenia Space Espana Madrid Spain School of Electrical and Computer Engineering National Technical University of Athens (NTUA) Greece

The Quality of Service (QoS) in land mobile satellite (LMS) communications drops drastically in the presence of shadowing and multipath fading. This paper studies two promising multiple-input multiple-output (MIMO) schemes, along with specific transmission techniques, aimed at overcoming this problem. First, specific proposals for a dual-satellite distributed MIMO scheme are studied based upon delay-tolerant and spectral-efficient schemes. As a second alternative, a hybrid satellite-terrestrial scheme is studied with specific proposals for MIMO processing. In order to carry out a performance assessment the paper addresses related MIMO satellite propagation channel modeling issues which lead to a new mathematical model to accommodate the multi-satellite transmission. In both cases, we quantify and conclude the MIMO gains in terms of bit error rate (BER) and spectral efficiency for urban and suburban environments. The transmitted air-interfaces in both proposed MIMO schemes are DVB-SH standard compatible. The analytical results have been validated by means of Monte Carlo simulations. © 2011 Elsevier B.V.

关键词： MIMO Propagation channel modeling Satellite communications Space time coding techniques

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Guest Editorial: Vehicular communications and networks - Part I

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IEEE Journal on Selected Areas in Communications 2011年第1期29卷 1-6页

作者： Wang, Cheng-Xiang Vasilakos, Athanasios V. Murch, Ross D. Stüber, Gordon Shen, Xuemin Sherman Chen, Wai Kosch, Timo Joint Research Institute for Signal and Image Processing School of Engineering and Physical Sciences Heriot-Watt University Edinburgh EH14 4AS United Kingdom Dept. of Computer and Telecommunications Engineering University of Western Macedonia Kozani 50100 Greece Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA 30332-0250 United States Department of Electrical and Computer Engineering University of Waterloo Waterloo ON N2L 3G1 Canada Applied Research Telcordia Technologies Inc. Piscataway NJ 07054 United States BMW Group Research and Technology Hanauer Strasse 46 D-80992 Munich Germany

Part I of this special issue is devoted to the physical layer, MAC layer, and physical-link cross-layer design technologies of vehicular communications and networks. There are 21 papers in this issue.

关键词： Communication Research iodine VEHICULAR COMMUNICATIONS

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A new filter bank algorithm for enhancement of early signs of ischemic stroke in brain CT images

A new filter bank algorithm for enhancement of early signs o...

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IEEE International Conference on signal and Image processing Applications (ICSIPA)

作者： Mehdi Sajjadi Rassoul Amirfattahi Mohammad Reza Ahmadzadeh Mohammad Ali Saghafi Digital Signal Processing Research Lab Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan Iran Smart Engineering System Research Group Department of Electrical Electronics & System Engineering University Kebangsaan Malaysia Bangi Selangor Darul Ehsan Malaysia

Brain CT images are very useful in diagnosis of cerebrovascular accidents (CVA). These images contain too many information. But most of the times, provided information is contaminated by noise and suffer from poor contrast. On the other hand, there are certain parts of the brain image that is really important to radiologist, while other image details are more or less confusing. This sparks the need for customized enhancement of brain CT images. Translation-invariant wavelet transform is being widely used in most of image processing tasks including image enhancement. This transform is calculated with a filter bank algorithm, called algorithme àtrous. In this paper we propose a filter bank structure similar to algorithme àtrous. This structure is more redundant and offers greater selectivity and flexibility to enhance desired features of brain CT images.

关键词： Computed tomography Wavelet transforms Image edge detection Lesions Image enhancement

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Adaptive variable degree-κ zero-trees for re-encoding of perceptually quantized wavelet packet transformed audio and high-quality speech

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ISRN signal processing 2011年第1期2011卷

作者： Ghahabi, Omid Savoji, Mohammad Hassan Department of Electrical and Computer Engineering Shahid Beheshti University Evin Sq. Tehran *** Iran Audio and Speech Processing Group Research Center of Intelligent Signal Processing (RCISP) Tehran *** Iran

A fast, efficient, and scalable algorithm is proposed, in this paper, for re-encoding of perceptually quantized wavelet-packet transform (WPT) coefficients of audio and high quality speech and is called "adaptive variable degree-κ zero-trees" (AVDZ). The quantization process is carried out by taking into account some basic perceptual considerations and achieves good subjective quality with low complexity. The performance of the proposed AVDZ algorithm is compared with two other zero-tree-based schemes comprising (1) embedded zero-tree wavelet (EZW) and (2) the set partitioning in hierarchical trees (SPIHT). Since EZW and SPIHT are designed for image compression, some modifications are incorporated in these schemes for their better matching to audio signals. It is shown that the proposed modifications can improve their performance by about 15-25%. Furthermore, it is concluded that the proposed AVDZ algorithm outperforms these modified versions in terms of both output average bit-rates and computation times. Copyright © 2011 O. Ghahabi and M. H. Savoji.

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A system for automatic HPV typing via PCR-RFLP gel electrophoresis

A system for automatic HPV typing via PCR-RFLP gel electroph...

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IEEE International Conference on Automation Science and engineering (CASE)

作者： Christos F. Maramis Anastasios N. Delopoulos Alexandros F. Lambropoulos Sokratis P. Katafigiotis Information Processing Laboratory-Multimedia Understanding Group Department of Electrical and Computer Engineering Aristotle University of Thessaloniki Thessaloniki Greece Laboratory of Molecular Biology Department of Obstetrics and Gynecology General Regional Hospital Papageorgiou Aristotle University of Thessaloniki Thessaloniki Greece

The identification of the types of the human papillomavirus (HPV) that have infected a female patient provides valuable information as regards to her risk for developing cervical cancer. A widely used method for performing the above task (namely HPV typing) is PCR-RFLP gel electrophoresis. However, the conventional HPV typing protocol is error-prone and resource-ineffective due to lack of interaction between the phases involved in it. In order to treat these shortcomings, we introduce a novel HPV typing system that can be built upon widely available laboratory equipment. The proposed workflow of the system automates the task of HPV typing via PCRRFLP gel electrophoresis. The proof-of-concept of the proposed methodology is evaluated via an experiment that emulates the operation of the introduced system on a set of real HPV data.

关键词： DNA computers Laboratories Protocols Estimation In vitro

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Musical applications of real-time signal processing

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EURASIP Journal on Advances in signal processing 2011年第1期2011卷 1-2页

作者： Jyri Pakarinen Jonathan S Abel Federico Fontana Victor Lazzarini Vesa Välimäki Department of Signal Processing and Acoustics Aalto University School of Electrical Engineering Espoo Finland CCRMA Stanford University Stanford USA Department of Mathematics and Computer Science University of Udine Udine Italy Sound and Music Technology Research Group National University of Ireland Maynooth Ireland

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Particle filtering for indoor RFID tag tracking

Particle filtering for indoor RFID tag tracking

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IEEE/SP Workshop on Statistical signal processing (SSP)

作者： Vladimir Sović Akshay Athalye Miodrag Bolić Petar M. Djurić Signal Processing Applications Group Universidad Politecnica de Madrid Spain Center of Excellence in Wireless and Information Technology Stony Brook University USA School of Information Technology and Engineering University of Ottawa Canada Department of Electrical & Computer Engineering Stony Brook University USA

In this paper, we propose a particle filtering (PF) method for indoor tracking using radio frequency identification (RFID) based on aggregated binary measurements. We use an Ultra High Frequency (UHF) RFID system that is composed of a standard RFID reader, a large set of standard passive tags whose locations are known, and a newly designed, special semi-passive tag attached to an object that is tracked. This semi-passive tag has the dual ability to sense the backscatter communication between the reader and other passive tags which are in its proximity and to communicate this sensed information to the reader using backscatter modulation. We refer to this tag as a sense-a-tag (ST). Thus, the ST can provide the reader with information that can be used to determine the kinematic parameters of the object on which the ST is attached. We demonstrate the performance of the method with data obtained in a laboratory environment.

关键词： Radiofrequency identification Backscatter Noise Protocols Kalman filters Target tracking

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A Radio Frequency Identification System for accurate indoor localization

A Radio Frequency Identification System for accurate indoor ...

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International Conference on Acoustics, Speech, and signal processing (ICASSP)

作者： Akshay Athalye Vladimir Savić Miodrag Bolić Petar M. Djurić Center of Excellence of Wireless and Information Technology Stony Brook University USA Signal Processing Applications Group Universidad Politecnica de Madrid Spain School of Information Technology and Engineering University of Ottawa Canada Department of Electrical & Computer Engineering Stony Brook University USA

In this paper we present a novel Radio Frequency Identification (RFID) system for accurate indoor localization. The system is composed of a standard Ultra High Frequency (UHF), ISO-18006C compliant RFID reader, a large set of standard passive RFID tags whose locations are known, and a newly developed tag-like RFID component that is attached to the items that need to be localized. The new semi-passive component, referred to as sensatag (sense-a-tag), has a dual functionality wherein it can sense the communication between the reader and standard tags which are in its proximity, and also communicate with the reader like standard tags using backscatter modulation. Based on the information conveyed by the sensatags to the reader, localization algorithms based on binary sensor principles can be developed. We present results from real measurements that show the accuracy of the proposed system.

关键词： Backscatter Protocols Accuracy RFID tags Modulation Antennas

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An Interdisciplinary Approach to Designing Adaptive Lighting Environments

An Interdisciplinary Approach to Designing Adaptive Lighting...

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International Conference on Intelligent Environments (IE)

作者： Remco Magielse Philip Ross Sunder Rao Tanir Ozcelebi Paola Jaramillo Oliver Amft Designing Quality in Interaction (DQI) Group Department of Industrial Design Intelligent Lighting Institute (ILI) Eindhoven University of Technology Eindhoven Netherlands System Architecture and Networks (SAN) Group Department of Mathematics and Computer Science Intelligent Lighting Institute (ILI) Eindhoven University of Technology Eindhoven Netherlands Signal Processing Systems (SPS) Group Department of Electrical Engineering Intelligent Lighting Institute (ILI) Eindhoven University of Technology Eindhoven Netherlands

Due to advancements in lighting technologies new opportunities for application emerge. In this paper an interdisciplinary study towards the development of adaptive lighting environments is presented. An implementation of an adaptive lighting environment is made in the domain of office work. For evaluation, experts from the domains of human-system interaction, activity and context recognition, and system architecture design are interviewed. Contributions are made with regard to the implementation of the adaptive lighting in office environments and an evaluation method that is in line with the interdisciplinary approach. From the evaluation method insights in the fields of human-computer interaction, activity and context recognition and system architecture and (wireless) networking and in topics that span across these fields are gained.

关键词： Indexes

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