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192 articles for “communication systems”
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Research ArticleOpen accessIn the abstractSymbol Timing Estimation in Multiband Orthogonal Frequency Division Multiplexing based Ultrawide band SystemM. N. Suresh, S. J. Thiruvengadam, V. AbhaikumarProblem statement: The Multiband Orthogonal Frequency Division Multiplexing (MB-OFDM) Based Ultra Wideband system (UWB) is highly susceptible to symbol timing error. Symbol timing estimation in MB-OFDM based UWB is difficult due to the presence of strongest path at delayed instant. Approach: Symbol timing estimation has two steps namely a coarse estimation and a fine estimation. In this study, a maximum … …American Journal of Applied Sciences, Vol. 9, Issue 4 · 10 Feb 2012 · 7,108 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Comparative Performance Analysis of Multiple-Input Multiple-Output using MATLAB with Zero Forcing and Minimum Mean Square Error EqualizersBara'u Gafai Najashi, Tan XiaohengProblem statement: Multiple-Input Multiple-Output systems (MIMO) were regarded as one of the most promising technologies in field of wireless communication. Generally considered as one of the several forms of smart antenna technology, it offers considerable increase in data throughput and link range without additional bandwidth or transmit power. The general idea involves the use of several antennas at the transmitter … …American Journal of Engineering and Applied Sciences, Vol. 4, Issue 3 · 29 Nov 2011 · 8,303 accessesView PDFCite
Research ArticleOpen accessIn the abstractAn Overview of Research Issues in the Modern Healthcare Monitoring System Design using Wireless Body area NetworkD. Suresh, P. AlliProblem statement: Healthcare is recognized various leading edge technologies and new scientific discoveries to enable better cures for diseases and better means to enable early detection of most life threatening diseases. The modern health care focused for optimally reducing the healthcare costs. Approach: The modern healthcare system enables medical professionals to remotely perform real-time monitoring, early diagnosis and treatment for … …American Journal of Applied Sciences, Vol. 9, Issue 1 · 5 Nov 2011 · 7,914 accessesView PDFCite
Research ArticleOpen accessIn the abstractEngineering Privacy RevisitedSabah Al-FedaghiProblem statement: Information Privacy Engineering (IPE) is the field that studies the protection of privacy in information and communication systems. The theoretical, technological and applications aspects of IPE require a framework that provides a general view and a systematic structure for the discipline’s topics. This study discusses certain characteristics of such a framework and proposes enhancing and strengthening its structure. … …Journal of Computer Science, Vol. 8, Issue 1 · 1 Nov 2011 · 7,059 accessesView PDFCite
Research ArticleOpen accessIn the abstractWays of Fishery Local Life: Processes of Participation in Management of Natural Resources in the Coastal Areas of the Upper Gulf of Eastern AreaSulak Sa-Ngiamlak, Kla Somtrakul, Thipaporn PohthawinProblem statement: Local fishery was an inherited occupation for a long time. The objective of this research were to study: (1) the local fishery lifestyle of community in local fishery on upper area in Gulf of Thailand, (2) the appropriate participation process in natural resource management on upper part in Gulf of Thailand of people and organization and (3) the … …Journal of Social Sciences, Vol. 7, Issue 4 · 16 Sep 2011 · 7,870 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Triune Brain: Limbic Mind Mind Plastic, Emotional MindFelice Corona, Francesco Perrotta, Carla CozzarelliProblem statement: The theory discussed is revealing, as compared to studies on the human brain, the fact that he has inherited the structure and organization of three fundamental types of reptiles, ancient or primitive mammals and mammals, or recent evolved. What is very disconcerting is that nature has been able to connect with each other and establish a sort of … …Current Research in Medicine, Vol. 2, Issue 1 · 15 Aug 2011 · 8,362 accessesView PDFCite
Research ArticleOpen accessIn the abstractModeling of Fundamental Frequency Contour of Thai Expressive Speech using Fujisaki's Model and Structural ModelSuphattharachai ChomphanProblem statement: In spontaneous speech communication, prosody is an important factor that must be taken into account, since the prosody effects on not only the naturalness but also the intelligibility of speech. Focusing on synthesis of Thai expressive speech, a number of systems has been developed for years. However, the expressive speech with various speaking styles has not been accomplished. … …Journal of Computer Science, Vol. 7, Issue 8 · 9 Aug 2011 · 6,980 accessesView PDFCite
Research ArticleOpen accessIn the abstractKoch Curves: Rewriting System, Geometry and ApplicationMamta Rani, Riaz Ul Haq, Norrozila SulaimanProblem statement: Recently, new Koch curves have been generated by dividing the initiator into three unequal parts. There is no formal rewriting system to generate such kind of curves. Approach: It is required to measure the new changed geometrical properties. Generalized rewriting systems for the new Koch curves have been developed. Results: New formulas have been given to measure their … …Journal of Computer Science, Vol. 7, Issue 9 · 23 Jul 2011 · 7,070 accessesView PDFCite
Research ArticleOpen accessIn the abstractOpen Source Programmers' Information Seeking During Software MaintenanceKhaironi Yatim Sharif, Mohd Rosmadi Mokhtar, Jim BuckleyProblem statement: Several authors have proposed information seeking as an appropriate case study for studying software maintenance and evolution that have provided empirical classifications of information seeking in commercial software evolution settings. Approach: However, there is minimal research in the literature describing the information seeking behavior of Open Source programmers, even though Open Source contexts would seem to exacerbate the … …Journal of Computer Science, Vol. 7, Issue 7 · 30 Jun 2011 · 8,151 accessesView PDFCite
Research ArticleOpen accessIn the abstractPerformance Analysis of Global Search Algorithm Based Multiuser Detector for Multi Carrier Code Division Multiple Access System under Clipping NoiseS. Sivanesskumar, R. SukaneshProblem statement: Multi Carrier Code Division Multiple Access (MC-CDMA), a promising technology for the 4G communication systems. The major limitation of MC-CDMA system is the Multiple Access Interference (MAI) which is due to near-far effect, frequency offset and nonlinear power amplification due to clipping noise. Approach: The performance of MC-CDMA under clipping noise using Global search algorithm based Multiuser detector … …Journal of Computer Science, Vol. 7, Issue 5 · 7 May 2011 · 6,690 accessesView PDFCite