Journal of Telecommunication, Switching Systems and Networks
Volume 1, Issue 1 (2014)
Published
Table of contents
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Analysis of Cellular Positioning Techniques in UMTS Networks
Abstract: Estimation of the location of a Mobile Station accurately is a key requirement to effectively provide a wide range of Location Based Services over mobile networks. Applications requiring positioning in mobile networks gained importance in recent years. This gives rise to the various location based services (LBS). Hence developing cellular positioning techniques have been a key research problem, with numerous localization solutions been proposed. There are several methods present to …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 1, Issue 1, 2014 · pp. 1–10 Read article
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A GLRD based Receiver design using OBEB algorithm for MIMO system
Abstract: This paper gives the performance comparison of a MIMO system applying a modified branch-estimate-bound (MBEB) and ordered branch-estimate-bound (OBEB) algorithms of generalized likelihood ratio detector (GLRD) in the presence of channel estimation error. Here, two sources of errors like, errors due to noise and errors due to time variations induced by Doppler effects are considered. The GLRD solves the transmitted symbols using joint channel symbol estimation by combining the channel …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 1, Issue 1, 2014 · pp. 11–15 Read article
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A Review Paper on Cooperative Spectrum Sensing (CSS) Techniques for Cognitive Radio Applications:
Abstract: Cognitive radio is the best solution for the spectrum scarcity and spectrum underutilization problem in wireless communication system, because of its ability to rapidly and automatically adapt operating parameters as per requirements and conditions. In this paper, a literature review of cooperative spectrum sensing techniques for cognitive radio is presented. In Cognitive radio, spectrum sensing is the main function which prevents the interference with the Primary Users (PU) and identifies …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 1, Issue 1, 2014 · pp. 16–24 Read article
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Optimization of Reflectance in Silicon based Ternary Grating SAG Structure using Plane Wave Expansion
Abstract: We investigate the silicon based ternary grating SAG (silicon on air on glass) structure for possible filter application. Grating is realized by one dimensional grating structure, which consists of ternary periodic structure, where ternary period is realized by the combination of silicon-air-silicon dioxide layers. Reflectance’s from such periodic structures is simulated using plane wave expansion method. Simulation result shows that number of layers in the periodic structure plays an important …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 1, Issue 1, 2014 · pp. 25–31 Read article
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Design of “Hexagonal Rings’’ Shaped Cover Metamaterial for WLAN Applications Enhancement of Microstrip Patch Antenna Parameters at 2.31 GHz
Abstract: A rectangular microstrip patch antenna (RMPA) along with metamaterial which has design of hexagonal rings-shaped cover structure is proposed at a height of 3.2 mm from the ground plane. The RMPA with proposed metamaterial structure is designed to resonate at 2.31 GHz frequency. This work is mainly focused on increasing the potential parameters of microstrip patch antenna. The proposed metamaterial structure significantly reduces the return loss and increases the bandwidth …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 1, Issue 1, 2014 · pp. 32–36 Read article
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Fivefold Stave in Squares with Circular Disk Structure Contiguous with RMPA for Augmentation of Variant Parameter for WLAN at 2.95 GHz
Abstract: A rectangular microstrip patch antenna with “Fivefold Stave in Squares with Circular Disk” shaped meta material cover is designed and replicated at a height of 3.2 mm from the ground plane. The antenna along with the proposed metamaterial structure is designed to resonate at 2.95 GHz frequency. But the proposed metamaterial cover significantly reduces the return loss and increases the bandwidth, and gain of the antenna in comparison to rectangular …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 1, Issue 1, 2014 · pp. 37–42 Read article