Browsing Computer Science & Communications by Title

Now showing items 9-28 of 95

    • Capacitive Model and S-Parameters of Double-Pole Four-Throw Double-Gate RF CMOS Switch 

      Srivastava, Viranjay M.; Yadav, Kalyan S.; Singh, Ghanashyam (Scientific Research Publishing, 2011-01)
      In this paper, we have analyzed the Double-Pole Four-Throw Double-Gate Radio-Frequency Complementary Metal-Oxide-Semiconductor (DP4T DG RF CMOS) switch using S-parameters for 1 GHz to 60 GHz of frequency range. DP4T DG RF ...

    • Cloud Computing Solution and Services for RFID Based Supply Chain Management 

      Jamal, S. M. Khalid; Omer, A.; Qureshi, Asiya A. S. (Scientific Research Publishing, 2013-09)
      Deploying and Implementing RFID Systems for tracking and controlling products in supply chain management is not affordable for small and midsized companies due to its complexity, cost, and difficulties pertaining data ...

    • Cognitive Radio Sensing Using Hilbert Huang Transform 

      Narayanankutty, K. A.; A. Nair, Abhijith; Soori, Dilip; Pradeep, Deepak; Teja, V. Ravi; K.B., Vishnu (Scientific Research Publishing, 2010-07)
      Vast segments of the frequency spectrum are reserved for primary (licensed) users. These legacy users often un-der-utilize their reserved spectrum thus causing bandwidth waste. The unlicensed (secondary) users can take ...

    • Comparison of Indoor Localization Systems Based on Wireless Communications 

      Dalce, Rejane; Val, Thierry; Bossche, Adrien V. (Scientific Research Publishing, 2011-10)
      Localization using a Wireless Sensor Network (WSN) has become a field of interest for researchers in the past years. This information is expected to aid in routing, systems maintenance and health monitoring. For example, ...

    • A Comprehensive Parametric Study of Planar Inverted-F Antenna 

      Chattha, Hassan T.; Huang, Yi; Ishfaq, Muhammad K.; Boyes, Stephen J. (Scientific Research Publishing, 2012-01)
      This paper presents a comprehensive numerical and experimental study of Planar Inverted-F Antennas (PIFA) involving all the parameters which may affect the characteristics of PIFA. It is found that PIFA characteristics are ...

    • Design of a Low Loss RF Mixer in Ku-Band (12 - 18 GHz) 

      Shah, Sanjeev K.; Chauhan, Rudra P.; Singh, Sanjay; Pandey, Lalit; Singh, Sandeep (Scientific Research Publishing, 2012-01)
      The goal of this paper is to design and develop low conversion loss mixers at Ku Band (12 - 18 GHz) in microstrip line configuration. The Ku-band (Kurtz-under band) is primarily used for satellite Communications, particularly ...

    • Design of an Acoustic Communication System Based on FHMA for Multiple Underwater Vehicles 

      Zhao, Zixin; Guo, Shuxiang (Scientific Research Publishing, 2010-07)
      This paper designs an underwater acoustic communication system based on tamed spread spectrum and Frequency Hopping Multiple Access (FHMA) for multiple underwater vehicles. In this system, multiple underwater vehicles can ...

    • Design of Aperture Coupled Microstrip Antenna Using Radial Basis Function Networks 

      Bose, Tanushree; Gupta, Nisha (Scientific Research Publishing, 2010-10)
      This paper, two Artificial Neural Network (ANN) models using radial basis function (RBF) nets are developed for the design of Aperture Coupled Microstrip Antennas (ACMSA) for different number of design parameters. The ...

    • Design of Low Power and High Speed CMOS Comparator for A/D Converter Application 

      Yewale, Shubhara; Gamad, Radheshyam (Scientific Research Publishing, 2012-04)
      This paper presents an improved method for design of CMOS comparator based on a preamplifier-latch circuit driven by a clock. Design is intended to be implemented in Sigma-delta Analog-to-Digital Converter (ADC). The main ...

    • Effect of Changes in Sea-Surface State on Statistical Characteristics of Sea Clutter with X-Band Radar 

      Ishii, Seishiro; Sayama, Syuji; Mizutani, Koichi (Scientific Research Publishing, 2011-07)
      We have made observations of X-band radar sea clutter from the sea surface and sea-surface state in the Uraga Suido Traffic Route, which is used by ships entering and leaving Tokyo Bay, and the nearby Daini Kaiho Sea ...

    • The Effect of Queuing Mechanisms First in First out (FIFO), Priority Queuing (PQ) and Weighted Fair Queuing (WFQ) on Network’s Routers and Applications 

      Mustafa, Mustafa E. G.; Talab, Samani A. (Scientific Research Publishing, 2016-05)
      The paper presents the simulation results of the comparison of three Queuing Mechanisms, First in First out (FIFO), Priority Queuing (PQ), and Weighted Fair Queuing (WFQ). Depending on their effects on the network’s Routers, ...

    • An Efficient Method to Reduce the Numerical Dispersion in the HIE-FDTD Scheme 

      Chen, Juan; Zhang, Anxue (Scientific Research Publishing, 2011-01)
      A parameter optimized approach for reducing the numerical dispersion of the 3-D hybrid implicit-explicit finite-difference time-domain (HIE-FDTD) is presented in this letter. By adding a parameter into the HIE-FDTD formulas, ...

    • Electronic Commerce Technology Adoption at the Scientific and Industrial Research and Development Centre 

      Rashama, Cosmas; Mungwena, Wilson; Damba, Tonderai (Scientific Research Publishing, 2013-06)
      This paper focuses on the level of adoption of E-Commerce Technology at the Scientific and Industrial Research and Development Centre (SIRDC), a Zimbabwean organization established by an act of parliament, with a mandate ...

    • Energy-Efficient and Coverage-Aware Clustering in Wireless Sensor Networks 

      Awad, Fahed; Taqieddin, Eyad; Seyam, Asmaa (Scientific Research Publishing, 2012-07)
      Energy efficiency and sensing coverage are essential metrics for enhancing the lifetime and the utilization of wireless sensor networks. Many protocols have been developed to address these issues, among which, clustering ...

    • Enhancing Multi-Factor Authentication in Modern Computing 

      Iwuoha, Obioha2; Emmanuel, Nwabueze1; Ekwonwune, Emmanuel (2017-07)
      Most network service providers like MTN Nigeria, currently use two-factor authentication for their 4G wireless networks. This exposes the network subscribers to identify theft and users data to security threats like snooping, ...

    • Enhancing Performance of Multi-Rate WLANs: Ant Colony Approach 

      Ma, Qiang; Al-Dhelaan, Abdullah; Al-Rodhaan, Mznah (Scientific Research Publishing, 2015-12)
      The trade-off between users’ fairness and network throughput may be unacceptable in a multi-rate 802.11 WLAN environment. In this paper, we will design a new intuitive simplified mathematical model called simplified ...

    • Error Resilient IPTV for an IEEE 802.16e Channel 

      Al-Jobouri, Laith; Fleury, Martin; Ghanbari, Mohammed (Scientific Research Publishing, 2011-04)
      Data-partitioning of IPTV video streams is a way of providing graceful quality degradation in a form that will work in good and difficult wireless channel conditions, as experienced by mobile devices. This paper’s proposal ...

    • Experimental Analysis of a Node B Coverage Based on the CPICH and Ec/Io Values 

      Zamudio-Castro, Iván; Vidal-Beltrán, Sergio; Ponce-Rojas, Jazmín; Sosa-Pedroza, Jorge (Scientific Research Publishing, 2011-01)
      This paper presents experimental results of a coverage analysis in a WCDMA network using the 850 MHz band; an urban electromagnetic propagation environment is considered. Obtained coverage estimation maps are based on Krige ...

    • Experimental Analysis of Voice and Data Transmission Parameters for Mobile Terminals in Cellular Data Networks 

      Jiménez-Licea, Montserrat; Vidal-Beltrán, Sergio; López-Bonilla, José L. (Scientific Research Publishing, 2011-01)
      This work presents the experimental results related to performance measurements in GSM and GPRS cellular data networks. Two Mobile Terminals were used, in order to take place the scenario. Power Level, Power vs Time, ...

    • Generalized Electromagnetic Pollution Monitoring Using WSN 

      Nouh, Sara; Elgaml, Nada; Ali, Nora; Khattab, Ahmed; Daoud, Ramez; Amer, Hassanein (Scientific Research Publishing, 2016-06)
      Wireless Sensor Networks (WSN) have recently become one of the major research areas in the wireless communication field and are implemented in a variety of applications. One of these applications that will be tackled in ...