Informatics Publishing Limited

K. Thirumalaivasan , R. Nakkeeran

Abstract

In this paper novel microstrip ring resonator based compact Ultra-Wideband (UWB) bandpass filters using different coupling structures are presented. The proposed filters are designed to provide a wide passband, low insertion loss and return loss, linear phase over the passband, flat group delay and high fractional bandwidth. The simulation of bandpass filter (BPF1) with interdigital coupling results a passband of 7.4 GHz over 2.2–10.5 GHz, minimum insertion loss of approximately -2 dB, return loss of around -40 dB and – 10 dB fractional bandwidth of 120 % while for the filter (BPF 2) with dual line coupling, they are 7 GHz over 3-14 GHz, -0.09 dB, -33 dB and 127.27 % respectively. The computed group delay variation in the passband for BPF1 is 0.2 ns while for BPF2 0.03 ns. The overall dimensions of the filters are 38 mm (length) × 3.2 mm (height) ×3.175 mm (breadth) and 16.5 mm (length) × 2.5 mm (height) × 1.6 mm (breadth) respectively. They are simulated using electromagnetic (EM) simulator, IE3D.

Keywords

Ultra-Wideband, Ring Resonator, Microstrip Coupling Structure, Bandpass Filters.

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J. Pradeep ¹, R. Nakkeeran ²

Affiliations
1 Department of Electronics and Communication Engineering, Pondicherry Engineering College, Puducherry - 605 014, IN
2 Department of Electronics and Communication Engineering, Pondicherry Engineering College, Puducherry-605 014, IN

Abstract

Next Generation Wireless Networks (NGWN) necessitates joint radio resource management to enhance QoS provisioning and efficient radio resource utilization. The objectives of the Joint Call Admission Control (JCAC) algorithm are to uniformly distribute the traffic load among the available Radio Access Technologies (RATs), to provide priority to handoff calls and hence to enhance connection-level QoS. The study of network has been done separately using load based and service based approaches for selecting the most appropriate radio access technologies and compared. An algorithm is proposed, hybrid JCAC, to overcome the limitations of load and service based JCAC by combining them. It manages load and service conditions efficiently. The numerical results obtained show that overall call dropping probability in heterogeneous network is reduced significantly.

Keywords

Call Admission Control, Radio Access Technology, Radio Resources, Call Dropping, Call Blocking, QoS, Markov Chain.

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G. Appasami ¹, K. Suresh Joseph ², R. Nakkeeran ¹, A. Selvakumar ¹

Affiliations
1 Department of Computer Science and Engineering, Dr. Pauls Engineering College, Anna University, Villupuram, Tamil Nadu, IN
2 Department of Computer Science, Pondicherry University, Kalapet, Pondicherry, IN

Abstract

Now a days new generation Interactive and attractive dynamic web applications are developed by Silverlight. It is developed my Microsoft on Dot Net 3.5 Frame work using extended Application Markup Language (XAML). User Interface Test Automation for Silverlight Applications (UITASA) plays a vital role in software industry; especially User Interface Test Automation (UITA) in new technology like Silverlight is a challenging task because of its high security and low accessibility. Agent Technology is intermediate software that provides a better bridge between User Interface Test Automation and Silverlight applications. There are different software agents for each group of controls to do User Interface Test Automation. For example button control agent will take care of all buttons in User Interface Test Automation.

Keywords

User Interface, Agents Test Automation, Silverlight Web Applications.

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P. Rengini ¹, R. Nakkeeran ²

Affiliations
1 HCL Technologies, Chennai, IN
2 Pondicherry Engineering College, IN

Abstract

The flexibility in relay networks and Orthogonal Frequency-Division Multiple Access (OFDMA) make the combination a suitable candidate network and air-interface technology for providing reliable and ubiquitous high-data-rate coverage in next-generation cellular networks. The Multiple-Input Multiple-Output based Orthogonal Frequency-Division Multiple Access (MIMO-OFDMA) is a promising high rate air interface technology. It is well known that the throughput and coverage of a system can be significantly enhanced by employing a proper resource allocation (RA) scheme. In this paper, we propose an efficient proportional fair (PF) allocation algorithm for MIMO-OFDMA based cellular relay networks in order to achieve throughput gain and to guarantee fairness at the same time. Numerical results show that, the proposed algorithm can achieve significant improvement on system throughput and fairness of the user throughput for the MIMO-OFDMA based cellular relay networks.

Keywords

MIMO, OFDMA, Proportional Fairness, Relaying, Resource Allocation.

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P. Rengini ¹, R. Nakkeeran ², P. Ranjith ³

Affiliations
1 HCL Technologies, IN
2 Department of Electronics and Communication Engineering, Pondicherry Engineering College, Pondicherry, IN
3 Department of Electrical and Electronics Engineering, Pondicherry Engineering College, Pondicherry, IN

Abstract

The flexibility in relay networks and Orthogonal Frequency-Division Multiple Access (OFDMA) make the combination a suitable candidate network and air-interface technology for providing reliable and ubiquitous high-data-rate coverage in next-generation cellular networks. The Multiple-Input Multiple-Output based Orthogonal Frequency-Division Multiple Access (MIMO-OFDMA) is a promising high rate air interface technology. It is well known that the capacity and coverage of a system can be significantly enhanced by employing a proper resource allocation (RA) scheme. In this paper, we propose an efficient proportional fair (PF) allocation algorithm for MIMO-OFDMA based cellular relay networks. This proposed algorithm provides a flexible subcarrier allocation in order to maximize the system capacity of the MIMO system. The proposed PF allocation algorithm is also used to improve the system capacity of the higher orders of the MIMOOFDMA based cellular relay networks. Numerical results show that, the proposed algorithm significantly improves the system capacity of the MIMO-OFDMA based cellular relay networks.

Keywords

OFDMA, MIMO-OFDMA, Relaying, Resource Allocation, Proportional Fairness.

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A. Rajesh ¹, R. Nakkeeran ²

Affiliations
1 Electronics and Communication Engineering Department, CCET, Pondicherry University, Puducherry, IN
2 Electronics and Communication Engineering Department, Pondicherry Engineering College, Puducherry, IN

Abstract

Home networking is becoming an attractive application not only for the Internet access but also for home automation. Hence applications over powerline communication (PLC) networks have drawn much interest in the communication industry, not only because of inherent convenience (no new wires), but almost all electrical devices have to connect to a power outlet eventually. At the physical layer the promising methods for improving inferior characteristics of the PLC system are orthogonal frequency division multiplexing (OFDM) and forward error correction (FEC). The performance analysis of the integrated PLC and visible light communication (VLC) systems using OFDM and turbo codes, under multipath channel conditions has been investigated. To increase the performance of the PLC networks a new hybrid protocol namely virtual slot multiple access (VSMA) has been investigated to improve the QoS for the home networks. An adaptive backoff mechanism has been proposed to enhance the performance of hybrid protocol. The proposed hybrid system has been analyzed for variable packet sizes and its performance metrics has been evaluated. The analysis has been made to choose an optimal packet size, to make the system more resistance under impulse noise and make it backward compatible with the existing technologies. The proposed hybrid scheme enhances the MAC throughput and reduces the access delay for various services as compared with the conventional protocol.

Keywords

FEC, OFDM, PLC, VLC, VSMA.

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G. Appasami ¹, K. Suresh Joseph ², R. Nakkeeran ¹, S. Rajesh ¹

Affiliations
1 Department of CSE, Dr. Pauls Engineering College, Villupuram, Tamilnadu, IN
2 Department of Computer Science, Pondicherry University, Pondicherry, IN

Abstract

This paper presents a novel approach in face digital image searching and matching. The given key image is converted into gray scale image and after that a matrix is computed with gray scale values of the key image. Then we are collecting the diagonal key elements for diagonal searching key sequence. Using Pair wise sequence alignment we are trying to match the key with available images in the large data base of collection of faces. Initially we discussed various techniques used in digital image searching and matching in this paper. This new algorithm Diagonal matrix is a new algorithm for all face images searching and matching. Face recognition is very essential in the field of criminology. Face Image searching and matching are very difficult task in image processing; there are several algorithms for face image matching. But still needs more optimization for image matching. Using this new approach we can match criminal photo from a large database. Face Image recognition, feature extraction and pattern matching needs improvements in Image processing. There are several methods for Face image searching and matching, but we need new optimized technique for image searching and matching. This new Diagonal matrix approach is tried to give optimized solution in Face digital image matching.

Keywords

Image Retrieval, Edge Detection and Matching, Face Recognition, Affine Invariant, Image Searching and Matching, Diagonal Searching and Pair Wise Alignment.

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