Journal of Communication Engineering & Systems
Volume 3, Issue 3 (2013)
Published
Table of contents
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A Multi-Hop Power Adaptive MAC Protocol using Fuzzy Logic for Wireless Networks
Abstract: AbstractPower-based connectivity is a recent research topic in ad hoc networks. Implementing power control mechanisms is essential to enhance the lifetime of the network, and also to improve the throughput, find cost-effective routes and spatial reuse. In this paper, MAC protocol is used for implementing coordination functions and power-control mechanisms using fuzzy rules. Fuzzy rules are generated by upper layers of the network layer using two input variables such as …
Published in Journal of Communication Engineering & Systems · Vol. 3, Issue 3, 2013 · pp. 1–9 Read article
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Block SLM Scheme for Efficient PAPR Reduction in OFDM Systems
Abstract: AbstractOrthogonal frequency division multiplexing (OFDM) is an attractive technique due to its high-speed data transmission and robustness for time-selective channels. However, the major drawback of OFDM system is high peak-to-average power ratio (PAPR). In this paper, two PAPR reduction schemes have been introduced; one is conventional selected mapping (SLM) scheme and a new proposed block selected mapping (BSLM) scheme to obtain PAPR reduction performance in OFDM system. In the proposed …
Published in Journal of Communication Engineering & Systems · Vol. 3, Issue 3, 2013 · pp. 10–16 Read article
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Computation of Electromagnetic Energy Flux Due to various Distributions of Oscillating Electric Dipoles
Abstract: AbstractThe authors have discussed about the effects of cell phone radiations, its applications along with its adverse effects. In this work we have computed the energy flux received at some specified point (say the human head) due to some simple distributions of dipoles by computing the relevant electric, magnetic fields and finally the Poynting vector. We have shown that although for a symmetric distribution of emitters the energy flux vanishes …
Published in Journal of Communication Engineering & Systems · Vol. 3, Issue 3, 2013 · pp. 17–25 Read article
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Optimized Performance Characteristics of a 450 nm Semiconductor Laser by Varying Differential Gain
Abstract: AbstractIn this work, the effects on the performance characteristics of a true-blue 3QW separate confinement heterostrcture edge-emitting laser are presented by varying differential gain. At the temperature of 300 K, the threshold current of the laser is . The peak material gain for the designed laser is obtained as and further used for the analysis of the performance characteristics of the designed double-heterostructure laser for the variation of differential gain. …
Published in Journal of Communication Engineering & Systems · Vol. 3, Issue 3, 2013 · pp. 26–35 Read article
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Design and Analysis of I-Slotted Rectangular Microstrip Patch Antenna for Wireless Application
Abstract: AbstractThis paper presents a novel design of an I-slotted patch antenna with compact nature and the study of various antenna parameters. The antenna is fed by the inset-feeding technique. The proposed patch antenna is designed and simulated on IE3D simulation software (Zeland program manager 9.0). The main aim of the proposed work is to design a large-bandwidth antenna with compact size. The proposed microstrip antenna has a wide bandwidth covering …
Published in Journal of Communication Engineering & Systems · Vol. 3, Issue 3, 2013 · pp. 36–40 Read article