Computer Science & Communications: Recent submissions

Now showing items 21-40 of 95

    • 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 ...

    • Microstrip Ultra-Wideband Filter with Flexible Notch Characteristics 

      Mokhtaari, Marjan; Bornemann, Jens (Scientific Research Publishing, 2012-01)
      A microstrip ultra-wideband (UWB) filter with unique shape, compactness, simplicity of operation and flexible notch characteristics is introduced. It is based on the fundamental and harmonic characteristics of a 50 Ohm ...

    • 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, ...

    • 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, ...

    • 3 - 10 GHz Ultra-Wideband Low-Noise Amplifier Using Inductive-Series Peaking Technique with Cascode Common-Source Circuit 

      Wu, Chia-Song; Lin, Tah-Yeong; Chang, Chien-Huang; Wu, Hsien-Ming (Scientific Research Publishing, 2011-10)
      The objective of this paper is to investigate a ultra-wideband (UWB) low noise amplifier (LNA) by utilizing a two-stage cascade circuit schematic associated with inductive-series peaking technique, which can improve the ...

    • 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 ...

    • A Novel Ultra-Wideband Monopole Antenna with Band-Stop Characteristic 

      Lak, Hadi J.; Ghobadi, Changiz; Nourinia, Javad (Scientific Research Publishing, 2011-10)
      In this letter, a simple monopole antenna with variable band-notched characteristic for ultra wide band (UWB) function is proposed. Two L-shaped quarter-waveguide resonators coupled to the ground plane with two shorting ...

    • Optimal M-BCJR Turbo Decoding: The Z-MAP Algorithm 

      Ouardi, Aissa; Djebbari, Ali; Bouazza, Boubakar S. (Scientific Research Publishing, 2011-10)
      In this paper, we propose a novel idea for improvement performances of the leader M-BCJR algorithm functioning in low complexity. The basic idea consists to localize error instant possibility, and then increase the complexity ...

    • Processor for Measuring Radio Network Design Quality 

      Gomez-Pulido, Juan A.; Mendes, Silvio P.; Vega-Rodriguez, Miguel A.; Cordeiro, Paulo J.; Sanchez-Perez, Juan M. (Scientific Research Publishing, 2011-07)
      In this paper we present the design and prototyping of an arithmetic processor based on reconfigurable technology, whose purpose is to determine in a parallel manner the quality of the solution in a radio network design ...

    • A Versatile Industrial Timer and Real Time Keeper 

      Yadav, Sagar. G; Narayanankutty, K. A (Scientific Research Publishing, 2011-07)
      Industrial timer requirements are multifaceted. On-delay, off-delay, cyclic or sequential timing requirements, with usual time range varying from seconds to days, depending on the process. Custom build timers cannot provide ...

    • Optimal Territorial Resources Placement for Multipurpose Wireless Services Using Genetic Algorithms 

      Cacciani, Daniele; Garzia, Fabio; Neri, Alessandro; Cusani, Roberto (Scientific Research Publishing, 2011-07)
      This paper presents a study for finding a solution to the placement of territorial resources for multipurpose wireless services considering also the restrictions imposed by the orography of the territory itself. To solve ...

    • 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 ...

    • Speed-Sensitive Weighting Algorithm for Digital Beamforming of Adaptive Antenna Arrays 

      Moghaddam, Shahriar S.; Moghaddam, Mahyar S. (Scientific Research Publishing, 2011-07)
      One of the main objectives of adaptive antenna array processing is reducing the computational complexity and convergence time in a joint state. This article proposes a speed-sensitive adaptive algorithm for estimating the ...

    • Uniticket: A Third Party Universal E-Ticket System Based on Mobile Phone 

      Hu, Linli; Wang, Yuhao; Li, Dong (Scientific Research Publishing, 2011-07)
      Prepaid energy meters have been widely adopted by utilities in different countries across the world as an innovative solution to the problem of affordability and consumption management. However, the present smart card based ...

    • 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 ...

    • 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 ...

    • Location Based Performance of WiMAX Network for QoS with Optimal Base Stations (BS) 

      Jha, Rakesh K.; Bholebawa, Idris Z.; Dalal, Upena D. (Scientific Research Publishing, 2011-07)
      In this paper we are given concept of our WiMAX (Worldwide Interoperability for Microwave Access) network perfor-mance for QoS monitoring and optimization solution for BS (Base Station) with multimedia application. In the ...

    • Spiral Tuning Stub CPW-Fed UWB Slot Offset, Edge Cleft and Edge Slotted Antennas 

      Jamali, A A.; Gaafar, A; Elaziz, A. A. (Scientific Research Publishing, 2011-07)
      After the release of the unlicensed Ultra Wideband (UWB) spectrum 3.1 GHz to 10.6 GHz for the commercial purposes by the Federal Communications Commission (FCC), industries and academia pay much attention due to its ...

    • Sampling and Reconstruction of Zero-Order Hold Signals by Parallel RC Filters 

      Olkkonen, J.T; Olkkonen, H (Scientific Research Publishing, 2011)
      In this work we describe a reconstruction algorithm for zero-order hold (ZOH) waveforms measured by a parallel sam-pling scheme. In the method the ZOH signal is fed to a parallel network consisting of resistor-capacitor ...

    • Performance Study of Multi-Path in VANETs and Their Impact on Routing Protocols 

      Wu, Jing; Wang, Yuhao (Scientific Research Publishing, 2011-07)
      Modeling complicated vehicular traffic behavior and analyzing effects on the communication performance of routing protocols taken by environmental factors have been a challenging task for the past several years. In this ...