Browsing Computer Science & Communications by Title

Now showing items 14-33 of 95

    • 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 ...

    • Generalized PIC Detector for Distributed STBC under Quasi-Synchronization 

      Astal, Mohammed T.; Abu-Hudrouss, Ammar M. (Scientific Research Publishing, 2012-01)
      In this paper, we propose a Generalized Parallel Interference Cancelation (G-PIC) approach for the detection of D-STBC under Quasi-Synchronization in the case of any number of relay nodes with just statistical information ...

    • Home Automation Device Protocol (HADP): A Protocol Standard for Unified Device Interactions 

      Gonnot, Thomas; Yi, Won -Jae; Monsef, Ehsan; Saniie, Jafar (Scientific Research Publishing, 2015-10)
      Daily activities have become more efficient and convenient with home automation. There are many different home automation devices in the market for consumers to enjoy their home for being smarter, resourceful, ...

    • Hybrid Amplification: An Efficient Scheme for Energy Saving in MIMO Systems 

      Poitau, Gwenael; Kouki, Ammar B. (Scientific Research Publishing, 2012-01)
      In this paper, a new amplification scheme for adaptive MIMO systems is proposed and tested. In this ‘hybrid amplification’ configuration, different amplifiers with different peak powers are used. In this way, each transmitter ...

    • Implicit, Context Management Systems for Mobile Health Services 

      Farahmandian, Vahid; Asosheh, Abbas (Scientific Research Publishing, 2015-03)
      Objectives: In this paper data flow and executive model of Mobile Health services risk management by the use of context aware systems are provided. Materials and Methods: Mobile health (M-Health) refers to using portable ...

    • Improving Bandwidth of Yagi-Uda Arrays 

      Formato, Richard A. (Scientific Research Publishing, 2012-01)
      A novel approach for improving antenna bandwidth is described using a 6-element Yagi-Uda array as an example. The new approach applies Central Force Optimization, a deterministic metaheuristic, and Variable Z0 technology, ...