ICTACT Journal on Communication Technology

C. Poongodi ¹, A. Shanmugam ²

Affiliations
1 Department of Information Technology, Bannari Amman Institute of Technology, IS
2 Bannari Amman Institute of Technology, IN

Abstract

A printed dipole antenna for wireless communication applications is designed and simulated using ADS software. This paper presents the simulated results of array of printed dipole antennas for different configuration which are used in the MIMO systems. The antenna is designed and characterized by measuring return loss, directivity, gain and radiation pattern. It also presents the channel capacity of MIMO system and single antenna system.

Keywords

Printed Dipole, Dipole Configurations, Capacity, MIMO.

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G. M. Tamilselvan ¹, A. Shanmugam ¹

Affiliations
1 Department of Electronics and Communication Engineering, Bannari Amman Institute of Technology, IN

Abstract

The recurrent collocation of IEEE 802.15.4 Wireless Sensor Networks (WSNs) and IEEE 802.11b Wireless Local Area Networks (WLANs) consequence in coexistence issues, as these networks share the same 2.4GHz Industrial, Scientific, and Medical (ISM) band. As a result, their performance may degrade. We have proposed a coexistence model of IEEE 802.15.4 and IEEE 802.11b networks, which attend to their coexistence behavior and explain their coexistence performance. The packet error rate (PER) of the IEEE 802.15.4 under the interference of the IEEE 802.11b is taken as a foremost performance measure , and is obtained from the bit error rate (BER). The signal to noise and interference ratio is used to calculate the BER. The minimum distance between IEEE 802.15.4 and IEEE 802.11b is observed from the PER. Throughput, average end-end delay and average jitter is used as performance measures to analyze the performance of IEEE802.15. The methodical results are validated for various topologies with and without mobility model using Qualnet 4.5 simulation.

Keywords

Bit Error Rate, Coexistence, IEEE 802.11b, IEEE 802.15.4, Throughput, End-End Delay and Jitter.

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T. V. P. Sundararajan ¹, A. Shanmugam ¹

Affiliations
1 Bannari Amman Institute of Technology, Sathyamangalam, IN

Abstract

Mobile Ad hoc Networks (MANETs) rely on the cooperation of all participating nodes to provide the fundamental operations such as routing and data forwarding. However, due to the open structure and scarcely available battery-based energy, node misbehaviors may exist.[1]. One such routing misbehavior is that some selfish nodes will participate in the route discovery and maintenance processes but refuse to forward data packets. This paper pointed out Energy based selfish nodes (EBSN) where these selfish nodes tend to use the network but do not cooperate, saving battery life for their own communications [2],[3]. We present a simulation study of the effects of Energy based selfish nodes (EBSN) on DSR routing protocol and its impact over network performance in terms of throughput and delay of a mobile ad hoc network where a defined percentage of nodes were misbehaving.

Keywords

Cooperation, Selfish Nodes, Ad Hoc Network, Routing.

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