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704 articles for “transmissivity”
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Performance Study of Parabolically versus Exponentially Tapered Multimode Interference Coupler
Abstract: ABSTRACT This paper shows mainly the performance study on tapered section of Multimode Interference (MMI) coupler having either parabolic or exponential taper section. The comparative study of the 1 × 2 MMI coupler with proposed structure, such as the normalized width variation, and variation of MMI length are investigated by the 2D finite difference beam propagation method (BPM). We have found that exponential tapered MMI coupler has advantageous compared to …
Published in Trends in Opto-electro & Optical Communication · Vol. 2, Issue 2, 2012 · pp. 8–17 Read article
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Simulation of Wavelength Division Multiplexing Based Fiber Optic Link by Using Different Types of Dispersion Compensating Fiber
Abstract: Wavelength division multiplexing multiplies various optical signals on a single optical fiber by using different wavelengths of laser light at the transmitter end and demultiplex them into multiple optical signal at the receiver end . We want to improve overall system performance and reduced as much as possible the transmission performance influenced by the dispersion, several dispersion compensation technologies are involved. In this paper we have studied the WDM based …
Published in Trends in Opto-electro & Optical Communication · Vol. 11, Issue 1, 2021 · pp. 19–24 Read article
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Modernization and Digitization in Power Grid Sub-Stations– The Prime tool for Multi Objective Optimization Methods.
Abstract: All Grid Sub-stations has four sections to control, operate and protect the large gamut electrical Power for its smooth flow till to the end customer.1. Generation, Loading, Conversion and Carrier Devices: We have generators as generation device, Motors and other electrical equipment as Loading device, Transformers as conversion device and Electrical Conductors as Carrier device. On technology front in this section, we have not experienced much technological changes. Only the …
Published in Trends in Opto-electro & Optical Communication · Vol. 12, Issue 1, 2022 · pp. 10–18 Read article
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Unleashing the Power of Human Body for Communication with RedTacton
Abstract: "Red Tacton" refers to the most recent advanced technology utilized as a communication network within the human body. NTT, which stands for Nippon Telegraph and Telephone Corporation, developed the Human Area Network (HAN) in Japan. RedTacton is a technology that utilizes the low field created by the human body to transmit data effectively. This ground-breaking technology uses the surface of the human body to transmit data securely and quickly. The …
Published in Trends in Opto-electro & Optical Communication · Vol. 12, Issue 3, 2022 · pp. 19–23 Read article
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Magic Mirror - Smart Reflective Interface for a Smart Home
Abstract: This project aims to accomplish the development of a contemporary mirror that serves as both a traditional mirror and an Internet of Things device. By incorporating display panels like LED and LCD into the mirror, crucial information may be presented, such as the date, time, headlines, and to-do lists. These mirrors can be programmed using artificial intelligence, but the cost will rise. Consequently, we sought to develop a product that …
Published in Trends in Opto-electro & Optical Communication · Vol. 13, Issue 1, 2023 · pp. 1–15 Read article
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Design and Analysis of Dual Band Equal Split N-way Wilkinson Power Divider
Abstract: Abstract A Design and analysis of dual band equal split N-way Wilkinson power divider is proposed in this specific work. For this the design of 2-way 4-way, 5-way and 6-way power divider is made with the help of an N-way power divider. An isolation resistor is used to achieve good isolation at output port of Wilkinson power divider. Parameters of the proposed configuration are calculated at the centre frequency of …
Published in Current Trends in Information Technology · Vol. 3, Issue 1, 2013 · pp. 17–20 Read article
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Encryption Technique for Security Enhancement of Communication System
Abstract: Wireless communication is used in several applications. Encryption of the text message is important to enhance the security in data transmission by avoiding unwanted third party access. Several algorithms are proposed and used for security enhancement of communication systems. In this research paper, an encryption and decryption algorithm to enhance the security of communication system is proposed. The plain message and the cipher text are different and message decoding is …
Published in Current Trends in Information Technology · Vol. 10, Issue 1, 2020 · pp. 30–35 Read article
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Study of Self Organizing Wireless Sensor Networks
Abstract: Recent advances in low-cost and low-power wireless communication coupled with progress in ad-hoc networking routing and protocols, have made “wireless sensor networks” a topic of active interest. Typically, hardware components in a wireless sensor network include sensor circuits, analog-todigital converters, microprocessors, and wireless communications transceivers. These hardware components need to be programmed using software tools to work cooperatively toward accomplishing a user-defined task. The main objectives of such a network …
Published in Current Trends in Information Technology · Vol. 11, Issue 3, 2021 · pp. 12–16 Read article
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AIS-based Anomaly Detection for IUU Fishing Activities
Abstract: The future of the Earth’s fish businesses is seriously threatened by the continuous use of illegal or illicit, unreported, and unregulated (IUU) fishing methods, a growing global demand, and deteriorating ocean ecosystem health. The livelihoods of legal fishing are also harmed by IUU fishing. The ongoing efforts to develop sustainable fisheries policies are also hampered by this. In order to manage fishery resources and ensure the safety of maritime traffic, …
Published in Current Trends in Information Technology · Vol. 13, Issue 1, 2023 · pp. 22–36 Read article
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Phase Noise Reduction in WLAN by Applying Wavelet Packet Multiplexing
Abstract: The IEEE 802.11 standards for wireless Local Area Networks (LANs) commercialized as Wi-Fi are deployed in office and home environments. These systems provide data rates up to 1300 Mbps at 5 GHz and 400 Mbps at 2.4 GHz with physical layer based on OFDM and MIMOOFDM. Traditionally, multiplexing in OFDM is realized using static orthogonal waveforms derived from Fourier transforms. The decoding of the data at receiver is based on …
Published in Journal of Communication Engineering & Systems · Vol. 7, Issue 3, 2017 · pp. 8–15 Read article
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REDUCING BASE STATION POWER CONSUMPTION
Abstract: As power consumption is becoming a key issue in mobile communication and the heart of mobile communication is Base Station. This paper concentrates on reducing BS power consumption by using three basic power saving mechanisms: sleep mode, discontinuous transmission and antenna adaptation. This algorithm concentrates on reducing power consumption for MIMO-OFDM. Simulations results state that the proposed algorithm is capable of reducing BS power consumption significantly.Cite this ArticlePooja Ashok Vairagade, …
Published in Journal of Communication Engineering & Systems · Vol. 7, Issue 3, 2017 · pp. 21–35 Read article
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Mitigation of Mobile Radio Parasitic Radiation Effects: A Review
Abstract: ABSTRACT In this paper, mitigation techniques useful for improving mobile radio systems power efficiency and decreasing electro-smog and specific absorption rate (SAR) induction, affecting human head and body, are presented. An analysis of main radiation effects from far field base stations and review of mitigation techniques for enhancing the efficiency of power transmission for mobile radio systems is shown, followed by an investigation of the complex radiation field components from …
Published in Journal of Communication Engineering & Systems · Vol. 2, Issue 1, 2012 · pp. 1–12 Read article
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Performance Analysis of OFDM System Using Non-conventional Transform and Non-conventional Mapping Schemes over Rayleigh Channel
Abstract: ABSTRACT High data rate wireless transmission is required to meet the rapidly increasing demands for mobile communications. Fast Fourier transform (FFT)-OFDM has drawn much attention due to its simple implementation and robustness against frequency-selective fading channels. Recently, the advantages of the discrete cosine transform (DCT)-based OFDM have come to the light. In this paper, performance of the conventional FFT-OFDM system is compared with non-conventional DCT-OFDM in terms of bit error …
Published in Journal of Communication Engineering & Systems · Vol. 2, Issue 1, 2012 · pp. 13–20 Read article
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Incorporating Mobility to Sensor Networks during Node Failure and Their Analysis for Radio Propagation Models
Abstract: AbstractWireless sensor networks are expected to find wide applicability and increasing deployment in the near future. It consists of spatially distributed autonomous sensors to monitor physical or environmental conditions and to cooperatively pass their data through the network to a main location. The more modern networks are bi-directional, also enabling control of sensor activity. The development of wireless sensor networks was motivated by military applications such as battlefield surveillance, many …
Published in Journal of Communication Engineering & Systems · Vol. 4, Issue 1, 2014 · pp. 29–35 Read article
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Implementation of Direct Sequence Spread Spectrum using MATLAB
Abstract: AbstractA major concern in the design of communication system is to provide secure communication. The system may be required to provide a form of secure communication in a hostile environment such that transmitted signal is not easily detected or recognized by unwanted listeners. This requirement is fulfilled by signaling techniques known collectively as spread spectrum modulation. The main advantage of spread spectrum communication system is its ability to reject interference …
Published in Journal of Communication Engineering & Systems · Vol. 4, Issue 2, 2014 · pp. 7–11 Read article
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Optimized Companding Technique using Firefly Algorithm for PAPR Reduction in OFDM System
Abstract: AbstractThe current trends in wireless industry are based on multi-carrier transmission technique such as Orthogonal Frequency Division Multiplexing (OFDM) which provides high data rates and is highly immune to frequency selective fading. However, OFDM is handicapped with a major problem of high peak-to-average power ratio (PAPR), which gives rise to non-linear distortion, inter-symbol interference and out-of-band radiation. Several PAPR reduction techniques have been devised over the last few decades in …
Published in Journal of Communication Engineering & Systems · Vol. 5, Issue 2, 2015 · pp. 8–14 Read article
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Simulation of Differential Space Time Block Coding
Abstract: AbstractIn such a coherent system, the underlying assumption is that the channel does not change during one frame of data. Thus, it can also be interpreted as the frame length is chosen such that the path gain change during one frame is negligible. This is basically the quasi-static fading assumption that we have used so far. There is a bandwidth penalty due to the number of transmitted pilot symbols. Of …
Published in Journal of Communication Engineering & Systems · Vol. 6, Issue 1, 2016 · pp. 19–25 Read article
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Survey Paper on Light Fidelity
Abstract: AbstractNowadays internet has the most important priority in our society, since it had made many changes in our today’s world. Using wireless communication in any public place or deciphering authentication in order to connect internet may lead to aggravation because of stumpy speed. A solution for this concern is LI-FI. This technology was sham by physicist Harald Haas. This technology allows transferring “data in the course of illumination “taking the …
Published in Journal of Communication Engineering & Systems · Vol. 6, Issue 2, 2016 · pp. 21–27 Read article
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ABER of Transmit Antenna Selection with Maximal Ratio Combinining-MIMO System over Nakagami-m Fading Channels
Abstract: AbstractThis paper presents the average bit error rate (ABER) of a multiuser, multiple input and multiple output (MIMO) wireless system. Transmit antenna selection at the base station and maximal ratio combining at the receiver is considered for downlink transmission. For coherent and noncoherent modulation schemes, ABER performance of the system is analyzed. The closed form expressions have been derived for ABER considering Nakagami-m fading channels. The effects of fading parameter …
Published in Journal of Communication Engineering & Systems · Vol. 9, Issue 1, 2019 · pp. 43–48 Read article
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A Novel Approach of Traffic Management in Software Defined Networking Using Internal Controller
Abstract: The complex structure of the current computer networks causes problems in network scalability and management and makes it hard and time-consuming to implement general policies. A new architecture called Software Defined Network (SDN) has been developed to address these problems and challenges. One of the most important issues in SDNs is traffic engineering, which is a good criterion for network performance evaluation. After introducing SDNs and examining traffic engineering and …
Published in Journal of Communication Engineering & Systems · Vol. 10, Issue 1, 2020 · pp. 22–31 Read article