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Image and Signal Processing for Networked eHealth Applications

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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An 8GHz Variable Gain Low Noise Amplifier (VGLNA) Utilizing Parallel Inter-Stage Resonance

An 8GHz Variable Gain Low Noise Amplifier (VGLNA) Utilizing ...

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Circuits and systems, (APCCAS), 2006 IEEE Asia Pacific Conference on;Singapore

作者： Lini Lee S. S. Jamuar R. M. Sidek S. Khatun Department of Electrical and Electronics Engineering Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia Department of Computer and Communication System Engineering Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia

A two-stage variable gain low noise amplifier (VGLNA) topology is proposed, which adopts a parallel interstage resonance. The characteristics of the parallel inter-stage resonance in gain enhancement are analyzed and this is then followed by the application of a simple circuit consisted of two transistors as the variable gain stage. The VGLNA is designed and simulated based on a 0.18μm CMOS technology for 8-GHz X-band applications. Simulation results show 13.63dB of power gain, 3.60dB of noise figure, 4.27dBm of IIP3 and dc power supply of 1V with 35.67mA current drawn.

关键词： Gain enhancement Parallel inter-stage resonance Variable gain low noise amplifier

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An Improved Power Consumption Circuit of a 5.7 GHz Variable-Gain Low Noise Amplifier (VGLNA) for RF Applications

An Improved Power Consumption Circuit of a 5.7 GHz Variable-...

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International RF and Microwave Conference, RFM

作者： L. Lee S. S. Jamuar R. Mohd Sidek S. Khatun Department of Electrical and Electronics Engineering Faculty of Engineering Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia Department of Computer and Communication System Engineering Faculty of Engineering Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia

A low voltage topology that uses a capacitively coupled resonating element has been introduced using 0.18 mum CMOS technology. The topology utilizes the decoupling scheme to dc isolate circuit elements that are connected in series and share a common dc current. A 5.7 GHz variable-gain low noise amplifier (VGLNA) is presented with simulation results exhibiting a noise figure of 1.02 dB, power gain of 19.41 dB with gain tuning range of 6 dB and IIP3 of -1.11 dBm. The power consumption reported is 12.88 mW at supply of V dd = 0.7 V for power optimization circuit. Simulation results show that the proposed VGLNA has better noise performance and improved power consumption compared to the conventional cascode VGLNA

关键词： Energy consumption Circuit noise Low-noise amplifiers Radiofrequency amplifiers Radio frequency Circuit topology CMOS technology Noise figure Circuit simulation Gain

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