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STM JOURNALS
I take the privilege to present the hard copy compilation for the [Volume 4 Issue (3)] of Journal of Communication Engineering & Systems (JoCES). The intension of JoCES is to create an atmosphere that stimulates creativeness, research and growth in the area of Communication Engineering & Systems. The development and growth of the mankind is the consequence of brilliant Research done by eminent Scientists and Engineers in every field. JoCES provides an outlet for Research findings and reviews in areas of Communication Engineering & Systems found to be relevant for National and International recent developments & research initiative. The aim and scope of the Journal is to provide an academic medium and an important reference for the advancement and dissemination of Research results that support high level learning, teaching and research in the domain of Communication Engineering & Systems. Finally, I express my sincere gratitude and thanks to our Editorial/ Reviewer board and Authors for their continued support and invaluable contributions and suggestions in the form of authoring writeups/ reviewing and providing constructive comments for the advancement of the journals. With regards to their due continuous support and co-operation, we have been able to publish quality Research/Reviews findings for our customers base. I hope you will enjoy reading this issue and we welcome your feedback on any aspect of the Journal.
Dr. Archana Mehrotra Director STM Journals
Journal of Communication Engineering & Systems
Contents
1. Analysis and Application of Cognitive Radio on 4G Communications Md. Nazrul Islam, Mohammad Mamunur Rashid, A.O.M. Asaduzzaman, Md. Shamim Hossain, Md. Alamgir Hossain
1
2. Analysis of Fractal based Nested Geometries Built on Design Configurations Sejal Kundalia, Vivek Unadkat, Surabhi Dwivedi
9
3. Use of Information and Communication Technology by Medical Students: A Study of Central Library of CUSMCH Shamajibhai D. Parmar, Shishirkumar H. Mandalia
18
Journal of Communication Engineering & Systems ISSN: 2249-8613 (online), ISSN: 2321-5151 (print) Volume 4, Issue 3 www.stmjournals.com
Analysis and Application of Cognitive Radio on 4G Communications Md. Nazrul Islam1, Mohammad Mamunur Rashid2, A.O.M. Asaduzzaman3, Md. Shamim Hossain3, Md. Alamgir Hossain3* 1
Department of CSE, Islamic University, Kushtia, Bangladesh School of Science and Technology, Bangladesh Open University, Gazipur, Bangladesh 3 Department of CSE, Islamic University, Kushtia, Bangladesh
2
Abstract Nowadays network services are available anywhere and anytime through the advancement in wireless communication technology. Several technology and generation are introduced for wireless communication such as 2.5G, 3G etc. But for faster and reliable communication wireless generations are improved—4G technology is one of them. 4G communication systems are being developed to solve the various problems faced by the current communication systems (3G, 2.5G). 4G will be an intelligent technology that will reduce the number of different technologies to a single global standard. Cognitive Radio (CR) is the key enabling technology for next generation networks. CR techniques provide the capability to use or share the spectrum in an opportunistic manner. With the use of CR, 4G wireless networks will support global roaming across multiple wireless and mobile networks. In this paper, analysis and application of CR in 4G communications is reviewed. IEEE 802.22 networks are cognitive technology-based networks which will enhance the performance of 4G communication systems. IEEE 802.16h (WiMAX) provides extensions to support unlicensed coexistence.
Keywords: Cognitive Radio (CR), WiMAX, Fourth Generation (4G), Federal Communications Commission (FCC), Cognitive Engine (CE)
JoCES (2014)Š STM Journals 2014. All Rights Reserved
Journal of Communication Engineering & Systems ISSN: 2249-8613 (online), ISSN: 2321-5151 (print) Volume 4, Issue 3 www.stmjournals.com
Analysis of Fractal based Nested Geometries Built on Design Configurations Sejal Kundalia1*, Vivek Unadkat1, Surabhi Dwivedi2 1
Electronics and Communication Department, Atmiya Institute of Technology and Science, Rajkot, Gujrat, India 2 ECED, S. V. National Institute of Technology, Surat, Gujrat, India
Abstract Fractal antenna based on the nested geometries are proposed and designed in this letter. The paper depicts the design optimization of the nested geometries for multi-rate characteristics. The antenna is fed by waveguide port. The design is obtained at the center frequency 3.5 GHz. Moreover the effect various nested elements have been observed in the geometry. The modification in geometry is introduced using pentagonal elements of the patch. The enhancement in the operating bands is observed by above geometry. Operating frequency bands are adjusted by variations in design parameters. Multiband functionality is observed in all the designs presented in this paper. By alterations in the geometry of this antenna various operating frequencies are achieved which are applicable to more than one applications. Gain and Directivity are stabilized to large extent. Improvement in the return loss is observed .These antenna designs are thoroughly simulated on FR-4 substrate with loss tangent 0.025 and dielectric constant 4.3 and analyzed using Computer Simulation Technology Microwave Studio. This antennas find applications in GPS and Wi-max.
Keywords: Fractal antenna, nested geometry, multiband applications
JoCES (2014) Š STM Journals 2014. All Rights Reserved
Journal of Communication Engineering & Systems ISSN: 2249-8613 (online), ISSN: 2321-5151 (print) Volume 4, Issue 3 www.stmjournals.com
Use of Information and Communication Technology| by Medical Students: A Study of Central Library of CUSMCH Shamajibhai D. Parmar*, Shishirkumar H. Mandalia Department of Library and Information Science, Sardar Patel University, Vallabhvidya Nagar, Gujarat, India
Abstract The use of information and communication technology (ICT) has become most influential and swift segment in library and information services. This study outlines the use of ICT by medical students and find out the significance of latest technology in central library. Presently, uses of electronic media and technologies are increased notably in healthcare profession, education and research. Medical students are often using ICT for an access to the library resources and online databases. In this study determine the requirements and use of the various tools and technique of ICT by healthcare students. Throughout, the study makes an effort to examine the use of ICT service by medical students at central library of C.U.Shah Medical College and Hospital, Gujarat. In this research apply different parameters like the purpose and frequency of visit, internet access and use of eresource, attitude of medical students towards ICT, use of ICT for access resources, effectiveness of ICT on medical education and research, impact of ICT on library services and view related to its troubles and level of satisfaction of usage of ICT.
Keywords: Information technology, communication technology, electronic technology, ICT, internet, library services, online access, healthcare professional, medical students, CUSMCH, Gujarat. Library Subject Classification: Z674.7-674.83 Computer Network Resources: ZA4150-4380
JoCES (2014)Š STM Journals 2014. All Rights Reserved