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88 articles for “Multiplex”
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Research ArticleOpen accessEvery word in the titleCyclic Prefix Length Determination for Orthogonal Frequency Division Multiplexing System over Different Wireless Channel Models Based on the Maximum Excess Delay SpreadAmar Al-Jzari, Kostanic IvivaCyclic Prefix (CP) is one of the key OFDM parameters. It is used to completely eliminate both Inter-Symbol Interference (ISI) and Inter-Carrier Interference (ICI) as long as the CP length is greater than the channel delay spread. By eliminating the ISI and ICI, the CP compensates for the effect of the multi-path dispersion; but it consumes a considerable amount of … …American Journal of Engineering and Applied Sciences, Vol. 8, Issue 1 · 13 Apr 2015 · 8,563 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleREDUCING CALL BLOCKING PROBABILITY IN HYBRID MULTICAST WAVELENGTH DIVISION MULTIPLEXING NETWORKS USING WEIGHTED ROUTING AND WAVELENGTH ASSIGNMENT ALGORITHMD. V. Pradeep Sankar, K. MuneeswaranIn the proposed work, the focus is on increasing the available wavelength in the all-optical networks, for which the Routing and Wavelength Assignment plays a vital role. In the earlier reported work, the wavelengths were assigned to the links which covers a set of destinations but not all the intended destinations. However this proposed work, attempts were made to create … …Journal of Computer Science, Vol. 10, Issue 2 · 13 Nov 2013 · 6,849 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleA Comparison between Electrical and Optical Chromatic Dispersion Compensation in Wavelength Divison Multiplexing Network Regarding to Electrical Pulse ShapesMohammad Syuhaimi Ab-Rahman, Majid MoghaddasiProblem statement: Besides of some impairment that has been inherited form single channel, specialists confronted with new obstacles in WDM implementation which bared them for achieving desired performance. Although Chromatic Dispersion (CD) exists in single channel too, it can worsens new nonlinearities which are occurs just in WDM systems. So CD compensation in WDM is even more vital than single … …Journal of Computer Science, Vol. 8, Issue 1 · 29 Oct 2011 · 6,920 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleIterative Channel Estimation Algorithm in Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing SystemsMona Nasseri, Hamidreza BakhshiProblem statement: The objective of this study is improving channel estimation accuracy in MIMO-OFDM system because channel state information is required for signal detection at receiver and its accuracy affects the overall performance of system and it is essential to improve the channel estimation for more reliable communications. MIMO-OFDM system was chosen in this study because it has been widely … …Journal of Computer Science, Vol. 6, Issue 2 · 28 Feb 2010 · 8,297 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleA Discrete Event Modeling and Simulation of Wave Division Multiplexing Unidirectional Slotted Ring Metropolitan Area NetworkH. A. Fua’ad, S. Shamala, M. Othman, Z. ZuriatiProblem statement: The lack of uniformity in the choice of simulation platforms for optical WDM networks stands behind the difficulty of developing a common simulation environment. Correlating WDM unidirectional slotted ring network to Discrete Event Simulation (DES) encompassing event definition, time advancing mechanism and scheduler has yet to be developed. Approach: The study focused on the proposed and the development … …Journal of Computer Science, Vol. 5, Issue 6 · 30 Jun 2009 · 6,680 accessesView PDFCite
Research ArticleOpen accessIn the keywordsAn Observational Study on the Prevalence of Sexually Transmitted Infections in Cheonan from 2017 to 2021Sun Jung Lee, Tae Su Jang, Jae Kyung KimAlthough the global incidence of sexually transmitted infections is increasing annually, there are few studies in Cheonan that have analyzed the frequency of infection by individual bacterial species by age since 2017. Therefore, in this observational study, we investigated trends in sexually transmitted infections in Cheonan, South Korea, since 2017. From January 2017 to November 2021, 3,297 specimens were obtained … …American Journal of Biochemistry and Biotechnology, Vol. 20, Issue 2 · 17 Apr 2024 · 6,316 accessesView PDFCite
Research ArticleOpen accessIn the keywordsThe Underestimated Prevalence of Ureaplasma Infections: A Comprehensive Epidemiological Study in South Korea (2018-2020)Jae Eun Choi, Bo Kyeung Jung, Eun Ju Oh, Jae Kyung KimUreaplasma infections are frequently underestimated due to potential inaccuracies in data collection from symptomatic patients. This study aimed to accurately assess the prevalence of Ureaplasma Urealyticum (UU) and Ureaplasma Parvum (UP) infections among outpatients aged 0-70 years in South Korea between 2018 and 2020. A total of 59,381 clinical samples, including swabs and urine specimens, were collected and analyzed using … …American Journal of Biochemistry and Biotechnology, Vol. 20, Issue 1 · 25 Mar 2024 · 6,130 accessesView PDFCite
Research ArticleOpen accessIn the keywordsGanoderma Species Associated with Basal Stem Rot Disease of Oil PalmLing-Chie Wong, Choon-Fah J. Bong, A. S. IdrisProblem statement: Basal Stem Rot disease (BSR) is one of the most serious diseases that have been causing major losses in the oil palm industry in Southeast Asia, especially in Malaysia and Indonesia. Several species of Ganoderma have been reported pathogenic to oil palm, however, the diversity and differentiation of the Ganoderma species were not widely studied and the identity … …American Journal of Applied Sciences, Vol. 9, Issue 6 · 19 Mar 2012 · 9,631 accessesView PDFCite
Research ArticleOpen accessIn the keywordsLack of Association of Glutathione S-transferase Gene Polymorphisms in Iranian Prostate Cancer SubjectsB. Sahar Ansari, R. Vasudevan, M. Mirinargesi et al.Problem statement: Glutathione S-transferase is super family genes that encode enzymes which involve in the detoxification of the cell and protects DNA from damage. Conflicting results was found in several studies in association with GSTT1 and GSTM1 gene polymorphisms and prostate cancer. In this study, we determined the association between the GSTT1 and GSTM1 gene polymorphism and prostate cancer in … …American Journal of Biochemistry and Biotechnology, Vol. 5, Issue 1 · 31 Mar 2009 · 8,273 accessesView PDFCite
Research ArticleOpen accessIn the keywordsDesign of a Low Power and High Speed Comparator using MUX based Full Adder Cell for Mobile CommunicationsG. Ramana Murthy, Ajay Kumar Singh, P. Velraj Kumar, Tan Wee Xin WilsonThis paper presents an implementation of comparator (1-bit) circuit using a MUX-6T based adder cell. MUX-6T full adder cell is designed with a combination of multiplexing control input and Boolean identities. The proposed comparator design features higher computing speed and lower energy consumption due to the efficient MUX-6T adder cell. The design adopts multiplexing technique with control input to alleviate … …American Journal of Applied Sciences, Vol. 14, Issue 1 · 16 Jan 2017 · 8,251 accessesView PDFCite