Call for Comming Issue

Volume 2, Issue 1 January 2014

S.No. Title Page No.
Design and Modeling of Propagation Models for WiMAX Communication System at 3.7GHz & 4.2GHz
Author: B.Chandran Mahesh, Dr. B. Prabhakara Rao
Abstract: WiMAX™ technology is based upon the IEEE 802.16 standard enabling the delivery of wireless broadband services anytime, anywhere. WiMAX products can accommodate fixed and mobile usage models across a range of applications. The IEEE 802.16 standard was developed to deliver non-line-of-sight (NLoS) connectivity between a base station and subscriber station. The Worldwide Interoperability of Microwave Access (WiMAX) technology becomes popular and receives growing acceptance as a Broadband Wireless Access (BWA) system. Estimation of path loss is very important in initial deployment of wireless network and cell planning. Numerous path loss (PL) models (e.g. Okumura Model, Hata Model) are available to predict the propagation loss. In this paper we compare and analyze five path loss models ( COST 231 Hata model, ECC-33 model, SUI model, Ericsson model and COST 231 Walfish-Ikegami model) in urban, suburban and rural environments in NLOS condition. Our main concentration in this paper is to find out a suitable model for different environments to provide guidelines for cell planning of WiMAX at operating frequencies 3.7 GHz and 4.2 GHz. There are several empirical propagation models which can precisely calculate up to 2 GHz. But beyond 2 GHz, there are few reliable models which can be referred for the WiMAX context. There are few proposed models [1]-[4], which focus on frequency range at 3.7 to 4.2GHz out of which we base our analysis. In this paper, we compare and analyze path loss behavior of some proposed models at 3.7-4.2 GHz frequency band. Thus, a network engineer may consume his/her time by using our referred model for deploying the initial planning.
Wireless monitoring of physiological data using Nexus-10 & Biotrace
Author: Suresh Kurumbanshi, Dr.Avichal Kapur and Dr.Preeti Bajaj
Abstract: For monitoring of physiological data of patient, we will develop a system where doctor will see the reports of ECG, EEG,EMG ,skin conductance ,respiratory signals of patients which are recorded in real time at any location . In this paper, bio-medical wireless signal recording & monitoring is easily carried out with the help of various sensor, Nexus module 10 & Bio-trace software for physiological monitoring of signals. These recorded signals would be required in training the functioning of human body.
Author: J.Steffi Agino Priyanka, S.Tephillah and A.M.Balamurugan
Abstract: A wireless sensor network (WSN) is comprised of a large number of sensors that collaboratively monitor various environments. The sensors all together provide global views of the environments that offer more information than those local views provided by independently operating sensors. There are numerous potential applications of WSNs in various areas such as residence, industry, military and many others. While the deployment of sensor nodes in an unattended environment makes the networks vulnerable to a variety of potential attacks. This paper focuses the various attacks associated with wireless sensor network.





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