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29th Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBS 2007), vol.6

作者： Ken'ichi Fujimoto Hirofumi Nagashino Yohsuke Kinouchi Ali A. Danesht Abhijit S. Pandya School of Health Sciences Faculty of Medicine University of Tokushima Tokushima Japan Department of Life System Institute of Technology and Science University of Tokushima Tokushima Japan Department of Communication Sciences and Disorders Florida Atlantic University Boca Raton FL USA College of Engineering and Computer Science Florida Atlantic University Boca Raton FL USA

Tinnitus is the perception of phantom sounds in the ears or in the head. Sound therapy techniques for tinnitus have been proposed. To account for mechanisms of tinnitus generation and the clinical effects of sound therapies from the viewpoint of neural engineering, we have proposed a plastic neural network model for the human auditory system. We found that this model has a bistable state, i.e., a stable oscillatory state and a stable equilibrium (non-oscillatory) state coexist at a certain parameter region. We also found that the oscillation can be inhibited by supplying sinusoidal stimulus, which is hypothesized as sound for treatment of tinnitus, to the model. By hypothesizing that the oscillation and the equilibrium correspond to generation and inhibition of tinnitus, respectively, we reported that these phenomena could explain the fact that the habituated human auditory system temporarily halts perception of tinnitus following sound therapy. This paper describes dynamical properties of the model and inhibition of the oscillation for two kinds of noise stimuli which correspond to sound for treatment of tinnitus in clinical. Through numerical simulations we found that adequate noise stimulus can inhibits the oscillation.

关键词： Plastics Neural networks Medical treatment Acoustic noise Humans Auditory system Imaging phantoms Ear Neural engineering Numerical simulation

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A New Wide Bandpass Filter Design with Symmetric Attenuation Characteristics

A New Wide Bandpass Filter Design with Symmetric Attenuation...

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2007 Asia Pacific Microwave Conference (APMC 2007), vol.5

作者： Juseok Bae Yongbeom Kim Kwisoo Kim Sunju Park Dongjin Jung Jongsik Lim Kwansun Choi Dal Ahn Dept. of Electrical and Communication System Engineering Soonchunhyang University Asan Chungnam Republic of KOREA Department of Electrical and Computer Engineering Texas A and M University College Station TX USA BIT Wireless Communication Soonchunhyang University Asan Chungnam Republic of KOREA Department of Electrical and Communication System Engineering Soonchunhyang University Asan ChungNam South Korea Dept. of Electrical and Computer Engineering Texas A&M University College Station Texas

This paper proposes a new frequency transformation method for improving the asymmetrical attenuation characteristics of a conventional lumped element band-pass filter (BPF). This new method results in formulas for filter components. The performance of a BPF designed using this method is tested using simulation and measurement. Since the new BPF design method is shown to be very useful for designing BPFs with wide passbands, it is applicable to broadband wireless communication filters, such as those used in ultra-wide band (UWB) wireless communication technology.

关键词： Frequency transformation method BPF (bandpass filter) Attenuation characteristic UWB (ultra-wide band)

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Image and Signal Processing for Networked eHealth Applications

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2006年

作者： Ilias G. Maglogiannis Kostas Karpouzis Manolis Wallace

ISBN: (数字)9781598290370

E-health is closely related with networks and telecommunications when dealing with applications of collecting or transferring medical data from distant locations for performing remote medical collaborations and diagnosis. In this book we provide an overview of the fields of image and signal processing for networked and distributed e-health applications and their supporting technologies. The book is structured in 10 chapters, starting the discussion from the lower end, that of acquisition and processing of biosignals and medical images and ending in complex virtual reality systems and techniques providing more intuitive interaction in a networked medical environment. The book also discusses networked clinical decision support systems and corresponding medical standards, WWW-based applications, medical collaborative platforms, wireless networking, and the concepts of ambient intelligence and pervasive computing in electronic healthcare systems.

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Simulation for transmitting of MPEG-4 over satellite network

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WSEAS Transactions on communications 2006年第1期5卷 57-65页

作者： Al-Haddad, S.A.R. Azis, Mohd Wardi Aduwati Sali, Salina Abd Samad Jantan, Adznan Ahmed, Elsadig Ramli, Abd Rahman Hassan, Wan Zuha Wan Department of Computer and Communication System Engineering Faculty of Engineering Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia

This project was carried out to study the several important effects for the transmission of video bit streams file over the satellite communication systems. This analyze will include the usage of different frequency and satellite altitude or distance of satellite from earth. There are several effects will be analyzed in this project, such as free space loss, propagation delay, transmission delay and coverage area of the satellite systems. The graph will be generated so the analyze can be done. The system will provide facilities like data processing which involves mathematical equations, data display, graph plotting and data from output graph. The system will bring us to the satellite performance analysis, which is important to maintain and improve the quality of the satellite services.

关键词： Satellite communication systems

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A New Approach for Bandwidth Enhancement Technique in Microstrip Antenna for Wireless Applications

A New Approach for Bandwidth Enhancement Technique in Micros...

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International RF and Microwave Conference, RFM

作者： D. Yoharaaj Raja Syamsul Azmir Alyani Ismail Department of Computer and Communication System Engineering Faculty of Engineering Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia

These days, there is a very large demand for wireless applications. Antennas which are used in these applications require being low profile, light weight, easily mounted and broad bandwidth. The microstrip antenna suits the features mentioned except for its narrow bandwidth, typically from less than 1% to several percent. This paper introduces an alternative approach in enhancing the bandwidth of the microstrip antenna to reduce its limitation. The wireless application that is selected to be studied is the wireless local area network (WLAN) application operating at a frequency of 2.45 GHz. The bandwidth enhancement technique which is studied is the identical dual patch microstrip antenna with air-gap (IDMA). By using this technique, a bandwidth enhancement of 11.020% can be achieved

关键词： Microstrip antennas Bandwidth Wireless LAN Frequency Air gaps Application software Permittivity Dielectric substrates Copper Coaxial components

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Simulation and Assessment of Bioinspired Visual Processing system for Epi-retinal Prostheses

Simulation and Assessment of Bioinspired Visual Processing S...

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

作者： Milena Vurro Giuseppe Baselli Francesco Orabona Giulio Sandini Department of Biomedical Engineering Polytechnic of Milan Milan Italy Department of Communication Computer and System Science University of Genoa Genoa Italy

Retinal prosthesis represents the best near-term hope for individuals with chronic blinding disease of the outer retina. However the small number of stimulating electrodes produces a poor, low resolution image. We propose a new preprocessing method for epi-retinal implants and validate it through a novel simulation of the implanted blind perception. Twenty-one normally sighted, untrained subjects performed a face recognition test. Three different electrodes grids were simulated: rectangular, hexagonal and log-polar. The results show that the proposed pre-processing method has a good and statistically significant performance improvement

关键词： Prosthetics Retina Electrodes Testing Visual prosthesis Implants Face recognition Photoreceptors Lighting Cities and towns

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Multi-rate transmissions on SAC-OCDMA system using new enhancement double-weight (EDW) codes 2

Multi-rate transmissions on SAC-OCDMA system using new enhan...

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2nd International Conference on Information and communication Technologies: From Theory to Applications, ICTTA 2006

作者： Hasoon, Feras N. Aljunid, S.A. Abdullah, Mohamad Khazani Shaari, Sahbudin Faculty of Information Science and Technology Multimedia Universit Melaka Malaysia Department of Computer and Communication System Faculty of Engineering University Putra Malaysia UPM Serdang43400 Malaysia Photonics Technology Laboratory Institute of Micro Engineering and Nanoelectronics Universiti Kebangsaan Malaysia UKM Bangi Selangor43600 Malaysia

ISBN: (纸本)0780395212

This paper presents a new code structure and its ability in supporting multiple transmission rates in point to point Spectral Amplitude Coding- Optical Code Division Multiple Access (SAC-OCDMA) links. The Double-Weight (DW) code family that has a basic fixed weight of 2 was proposed. Enhancement Double Weight (EDW) Code is a DW code family variation that has variable weight of greater than one. The ability of EDW codes to support simultaneous transmissions at different bit rates is shown through simulated results of the bit error rate (BER) and the eye patterns. Three EDW encoded channels were used at the bit rates of 2.5Gbps and 10Gbps. EDW code shown here significantly performs better than Hadamard and Modified Frequency Hopping (MFH) codes. © 2006 IEEE.

关键词： Bit error rate

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Improving Bit Error Rate of OCDMA systems Using AND Subtraction Technique

Improving Bit Error Rate of OCDMA Systems Using AND Subtract...

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International RF and Microwave Conference, RFM

作者： S.A. Aljunid S. Zarihan M.S. Anuar M.N. Junita A. Norsuhaida M.D.A. Samad M.K. Abdullah School of Computer and Communication Engineering Northern Malaysia University College of Engineering Kangar Perlis Malaysia Photonics Laboratory Department of Computer and Communication System Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia

A new detection scheme, namely AND subtraction technique is proposed and presented in this paper. The theory is being elaborated and experimental results have been done by comparing double-weight (DW) code against the existing code, Hadamard. In this paper we have proved that AND subtraction technique gives better bit error rates (BER) performance than complementary subtraction technique against the received power level. The overall system cost and complexity can be reduced by using less number of filters in this technique. At the same time, the performance of the OCDMA system is improved significantly because with less number of filters in the decoder, the total power loss can be reduced and this can be clearly seen in the result

关键词： Bit error rate Subtraction techniques Error correction Error correction codes Multiple access interference Optical receivers Phase detection Filters Optical transmitters Multiaccess communication

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Towards Ternary Optical communication by Soft Decoding

Towards Ternary Optical Communication by Soft Decoding

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The Joint International Conference on Optical Internet and Next Generation Network (COIN-NGNCON)

作者： M Mokhtar M K Abdullah S D Walker Department of Electronic System Engineering University of Essex Wivenhoe UK Department of Computer and Communication Systems Engineering Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia

Unlike the conventional 2 M level soft decision, a new soft decoding technique is proposed on optical ternary system. It is shown that (85 2 ,74 2 ,6) code improves at 10 dB coding gain whilst increasing the code eff... 详细信息

关键词： Optical fiber communication Error analysis Optical modulation Iterative decoding Bandwidth Forward error correction systems engineering and theory Computational modeling Encoding Optical fibers

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Analysis and design of control system with equivalent-input-disturbance estimation

Analysis and design of control system with equivalent-input-...

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IEEE International Conference on computer-Aided Design

作者： Jin-Hua She Xin Xin Tomio Yamaura School of Bionics Tokyo University of Technology Hachioji Tokyo Japan Department of Communication Engineering Faculty of Computer Science and System Engineering Okayama Prefectural University Okayama Japan

This paper examines the mechanism of disturbance rejection in control systems employing a technique called equivalent-input-disturbance estimation. Analysis of the mechanism shows that the filter in the control system strongly affects the disturbance rejection performance. A new method of designing such control systems that employs H infin control theory and linear matrix inequalities is presented; and simulations of a magnetic levitation system demonstrate its validity

关键词： Control systems Magnetic analysis Performance analysis Magnetic separation Filters Design methodology Control system synthesis Control theory Linear matrix inequalities Magnetic levitation

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