Computer Science & Communications: Recent submissions

Now showing items 61-80 of 95

    • A New Algorithm of Mobile Node Localization Based on RSSI 

      Zhang, Jie; Liu, Hongli; Huang, Bowei (Scientific Research Publishing, 2011-04)
      Position mobile node coordinate is a key component to determine the accuracy and efficiency of positioning in wireless sensor networks. Flexible location algorithm admits to adjust the accuracy and time cost of positioning ...

    • Measurement of Rain Attenuation in Terahertz Wave Range 

      Ishii, Seishiro; Sayama, Syuji; Kamei, Toshihisa (Scientific Research Publishing, 2011-07)
      ain attenuation at 355.2 GHz in the terahertz wave range was measured with our new 355.2 GHz measuring system under rainfall intensities up to 25 mm/hr. Rain attenuation coefficients were also calculated using four ...

    • 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 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 ...

    • 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 ...

    • Sensor Placement to Improve the Positioning Performance Based on Angle of Arrival (AOA) 

      Omidali, Behzad; Shirazi, S. S. (Scientific Research Publishing, 2010-07)
      In this paper, a method for sensor placement to improve the placement quality based on angle of arrival of signal in a specific area is proposed. The installation place of sensors may be constrained with specified boundaries. ...

    • Performance of Double-Pole Four-Throw Double-Gate RF CMOS Switch in 45-nm Technology 

      Srivastava, Viranjay M. (Scientific Research Publishing, 2010-10)
      In this paper, we have investigated the design parameters of RF CMOS switch, which will be used for the wireless tele-communication systems. A double-pole four-throw double-gate radio-frequency complementary-metal-oxide-semicon- ...

    • Resonant Length Formulations for Dual Band Slot Cut Equilateral Triangular Microstrip Antennas 

      Deshmukh, Amit A.; Ray, K. P. (Scientific Research Publishing, 2010-10)
      The dual band equilateral triangular microstrip antennas are realized by cutting the slots of either quarter wave or half wave in length, inside the patch. In this design, however these simpler approximations of slot length ...

    • A New Adaptive EDCA Approach to QoS of Wireless Communications 

      Wang, Huibin; Hu, Yang; Zhang, Lili; Xia, Wei (Scientific Research Publishing, 2010-07)
      Under the background of intelligent transportation application, QoS for various services is different in wireless com-munication. Based on the MAC layer protocol, this paper analyzes the QoS in IEEE 802.11 MAC protocol ...

    • The Performance Gain of Cognitive Radio in Adaptive Modulation Scheme 

      Foukalas, Fotis (Scientific Research Publishing, 2010-07)
      Cognitive radio is considered as one of the main enablers for provisioning dynamic and flexible spectrum/channel allocation in wireless communications. The reliable data transmission over cognitive radio should employ ...

    • A Perspective on Traffic Measurement Tools in Wireless Networks 

      Siddamallaiah, Ramesh B.; Subramanian, Gowrishankar; Satyanarayana, Piriyapatna S. (Scientific Research Publishing, 2010-07)
      To understand the characteristics of the wireless networks, the network usage data from wireless measurement tools are essential. The data collection is a process of collecting the network time-varying information in ...

    • WiMAX System Simulation and Performance Analysis under the Influence of Jamming 

      Jha, Rakesh; Patel, Hardik; Dalal, Upena D.; Vishal, Wankhede A. (Scientific Research Publishing, 2010-07)
      This paper presents simulation of WiMAX based system under jamming. The performance of the system was found out to greatly differ with the use of different jamming signals, allowing central areas to be identified, where ...

    • Address Resolution Protocol (ARP): Spoofing Attack and Proposed Defense 

      Al Sukkar, Ghazi; Saifan, Ramzi; Khwaldeh, Sufian; Maqableh, Mahmoud; Jafar, Iyad (Scientific Research Publishing, 2016-07)
      Networks have become an integral part of today’s world. The ease of deployment, low-cost and high data rates have contributed significantly to their popularity. There are many protocols that are tailored to ease the process ...

    • Mobile Ad-Hoc Networks Applications and Its Challenges 

      Raza, Naeem; Aftab, Muhammad U.; Akbar, Muhammad Q.; Ashraf, Omair; Irfan, Muhammad (Scientific Research Publishing, 2016-07)
      Mobile Ad-Hoc Network (MANET) is an infrastructure less wireless network of autonomous collection of mobile nodes (Smart phones, Laptops, iPads, PDAs etc.). Network is self-configured to reconstruct its topology and routing ...

    • 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, ...

    • 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 ...

    • Analysis of Geo Positioning System Using RF & DA 

      Kohli, Jaspreet K.; Potgantwar, Amol (Scientific Research Publishing, 2016-04)
      Indoor positioning systems (IPSs) have been intended to provide position information of persons and devices. Higher user percentage of handheld devices such as tablets or mobile phones had led to the development of a number ...

    • Survey on Routing in Pocket Switched Network 

      Sarkar, Ratna R.; Rasul, Khadija; Chakrabarty, Amitabha (Scientific Research Publishing, 2015-09)
      Pocket switched Network (PSN) is an emerging research magnet that has been attracting researchers. This paper provides an introduction to PSN and covers some of its basic features and challenges. Continuous connectivity ...

    • 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 ...

    • Power Efficient Scheduled-Based Medium Access Control Protocol over Wireless Sensor Networks 

      Khan, Muhammad S.; Alajlan, Abrar; Almasri, Marwah (Scientific Research Publishing, 2016-02)
      The flexible use of sensors has made them an attractive device to be deployed in almost every field of life such as health, military and home. Recent advancement in electronics and wireless communications has witnessed the ...