Search
43 articles for “transmission spectrum”
-
Electrical Tunability of Transmission Spectrum in 1D Ternary Photonic Band Gap Structures
Abstract: AbstractElectrical tunability of transmission spectrum in 1D Ternary Photonic Band Gap (PBG) structures is studied in this paper. The electro-optic effect can be used to change the refractive index of the constituent material layers of the structure to tune the transmission spectrum. Use of electrical tuning in PBG structure offers the advantages of fast tuning speed, ease of computer controllability etc. The electro-optic effect based tuning will be faster than …
Published in Trends in Opto-electro & Optical Communication · Vol. 7, Issue 2, 2017 · pp. 51–56 Read article
-
Rapid Determination of Content of Etoricoxib in Pharmaceutical Formulations by Mid-Infrared Spectroscopy
Abstract: The present paper is an attempt to highlight a new technique FTIR-ATR along with its referenced validated method, UV spectrophotometric analysis. Different concentrations of etoricoxib were used as samples to draw standard plot. From different samples, a transmission spectrum was recorded according to the prominence of peaks. The present study has chosen the three most prominent peaks for analytical purpose in case of samples of etoricoxib and marketed formulations. All …
Published in Research and Reviews: A Journal of Pharmaceutical Science · Vol. 4, Issue 3, 2013 · pp. 20–32 Read article
-
Use of the Visible Spectrum of Light and Light Transmission: A Review
Abstract: Almost everyone uses the internet today, either over a wired or wireless network, to complete their tasks. Everyone, including businesses, organisations, entrepreneurs, and institutions, is concerned about accessing the right information at the right time and place, so internet speed is a significant issue. Then you need technology, a wide range of channels, and quick internet connectivity. According to 1EEE 802.11n specifications, wireless fidelity (Wi-Fi) provides a speed of 150 …
Published in Trends in Opto-electro & Optical Communication · Vol. 12, Issue 3, 2022 · pp. 31–36 Read article
-
Compound Transmission Security for Mobile Cloud Computing Using Spread Spectrum Technique
Abstract: By accessing data stored in remote data centres, "mobile cloud computing" provides users with IT services tailored to their specific needs. It also provides the infrastructure to support hosting for pervasive applications in the corporate, scientific, and consumer spheres. The cloud or data centre server cannot automatically lease the appropriate amount of services based on the needs of the users. So, Mobile Cloud Computing (MCC) consists of three sub-modules viz. …
Published in Journal of Mobile Computing, Communications & Mobile Networks · Vol. 10, Issue 3, 2023 · pp. 8–28 Read article
-
Number of Laser Pulses Influence on Optical Properties of Pulse Laser Deposited ZnS Thin Films
Abstract: In present work four samples of ZnS thin films deposited on glass substrate using pulse laser deposition method with different number of laser pulses, the effect of the number of laser pulses on the optical properties of ZnS thin films was studied. Q-Switched Nd: YAG laser with the fundamental wavelength 1064 nm, laser pulse energy of 100 mj with fixed pulse repetition rate of 2 Hz were used, and varied …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 6, Issue 1, 2019 · pp. 1–9 Read article
-
Investigation of Electronic Transport Characteristics of Co-Doped B40 Molecular Junction for Detection of Isoprene: A DFT Study
Abstract: The early identification of lung cancer is crucial and it can be diagnosed non-invasively by assessing the exhalation. Analysing a patient's breath profile can reveal malignant growths in their lungs. In this work, B40 co-doped with indium and iron is used as a molecular junction to sense isoprene, a well-known lung cancer biomarker present in the exhalation. The electronic transport characteristics of the molecular junction designed for isoprene detection are …
Published in Journal of Polymer & Composites · Vol. 13, Issue 1, 2025 · pp. 907–916 Read article
-
Synthesis and Characterization of In2S3 Nanoflake Thin Film for Photosensor Applications
Abstract: Indium sulphide (In2S3) thin films in the form of nanoflakes are synthesized by using chemical vapour deposition method on glass substrate with the intension to test its photosensor applications. These as deposited nanoflake thin films are characterized for physicochemical properties using X-ray diffraction (XRD) pattern, energy dispersive X-ray (EDAX) analysis,scanning electron microscopy (SEM) while optoelectronic properties were studied using optical and electrical characteristics obtained through UV-Vis transmission spectroscopy and I-V …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 4, Issue 3, 2017 · pp. 21–26 Read article
-
Performance Enhancement of Broadband Cellular Networks Using Massive MIMO Technology
Abstract: The rapid growth of mobile data traffic driven by smartphones, Internet of Things (IoT) devices, video streaming, and cloud-based applications has placed significant pressure on existing broadband cellular networks. As the need for faster data transmission, enhanced spectrum utilization, and dependable wireless communication continues to grow, Massive Multiple-Input Multiple-Output (Massive MIMO) has become a fundamental technology for modern communication networks, particularly in 5G and future-generation wireless systems. Massive MIMO technology …
Published in Journal of Communication Engineering & Systems · Vol. 16, Issue 2, 2026 · pp. 11–18 Read article
-
A Survey on Cognitive Radio Ad Hoc Network Architecture
Abstract: Cognitive radio ad hoc networks (CRAHNs) represent an innovative paradigm in wireless communication, leveraging the dynamic spectrum access capabilities of cognitive radios (CRs) to enhance network performance and spectrum efficiency. The architecture of CRAHNs integrates cognitive radio capabilities with ad hoc networking principles, enabling devices to manage spectrum resources autonomously and intelligently in a decentralized manner. This abstract outlines the key components and functionalities of CRAHN architecture, highlighting its potential …
Published in Journal of Communication Engineering & Systems · Vol. 14, Issue 3, 2024 · pp. 1–7 Read article
-
Performance Enhancement of Cognitive Radio Spectrum Sharing (CRSS) with MIMO System
Abstract: A key challenge in operating cognitive radios (CRs) in a self-organizing (ad hoc) network is to adaptively and efficiently allocate transmission powers and spectrum among CRs according to the surrounding environment. Cognitive radio networks will provide high bandwidth to mobile users via heterogeneous wireless architectures and dynamic spectrum access techniques. CR networks inflict challenges due to the fluctuating nature of the available spectrum, as well as the diverse QoS requirements …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 2, Issue 3, 2015 · pp. 13–18 Read article
-
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
-
Investigations on the impact of modulation formats and weather conditions in FSO link employing polarization division multiplexing and coherent detection-orthogonal frequency division multiplexing
Abstract: Free space optics (FSO) is a communication system where free space acts as medium between transceivers and they should be in line-of-sight for successful transmission of optical signal. Medium can be air, outer space, or vacuum. This system can be used for communication purpose in hours and in lesser economy. There are many advantages of FSO like high bandwidth and no spectrum license. The transmission in FSO is dependent on …
Published in Journal of VLSI Design Tools and Technology · Vol. 10, Issue 2, 2020 · pp. 17–25 Read article
-
Future Now: Network Architecture of 6G
Abstract: 5G networks are currently being rolled out in various parts of the globe and are expected to be done as the decade ends. However, with the continuously increasing demand for bandwidth and the need for automation, even the most advanced network architecture is expected to reach its capacity limit by 2030. The emergence of wireless technologies has led to the introduction of new infrastructure elements like High-Speed Packet Access (HSPA) …
Published in Current Trends in Signal Processing · Vol. 13, Issue 2, 2023 · pp. 18–23 Read article
-
Study of Spectrum Sensing Techniques for OFDM-based Cognitive Radio
Abstract: Nowadays OFDM (Orthogonal Frequency Division Multiplexing) techniques are adopted by many existing or progressing wireless communication standards. OFDM’s sensing and spectrum shaping capabilities together with its flexibility and adaptivity make it the best transmission technology for CR system. Spectrum sensing helps to detect the spectrum holes (unutilized bands of the spectrum) providing high spectral resolution capability. Thus, a robust spectrum sensing algorithm for OFDM modulated signals is highly decide to …
Published in Recent Trends in Electronics Communication Systems · Vol. 1, Issue 1, 2014 · pp. 25–31 Read article
-
Maximization of Spectrum Efficiency Using PSO, HPSO-GA Algorithms for Cognitive Radio
Abstract: A cognitive radio (CR) is an intelligent radio that can be programmed and configured dynamically. Its transceiver is designed to use the best wireless channels in its vicinity. Such a radio automatically detects available channels in wireless spectrum by the process of spectrum sensing, then accordingly changes its transmission or reception parameters to allow more concurrent wireless communications in a given spectrum band at one location. This paper discusses the …
Published in Recent Trends in Sensor Research & Technology · Vol. 3, Issue 2, 2016 · pp. 19–28 Read article
-
Clipping of Precoded OFDM in Cognitive Radios
Abstract: To provide reliable and opportunistic utilization of the radio electromagnetic spectrum, cognitive radio (CR) has been proposed as an intelligent technology that provides dynamic spectrum access for users by opportunistically utilizing even the licensed spectral bands. Orthogonal frequency division multiplexing (OFDM) is considered by many to be an effective multicarrier transmission technique for the implementation of CR system transmissions due to its flexible spectrum access. Out-of-band (OOB) radiation of an …
Published in Current Trends in Signal Processing · Vol. 4, Issue 3, 2014 · pp. 1–7 Read article
-
ED-SS based Cognitive Radio (CR) over Rayleigh Fading Channel and the Performance of Optimized Cooperative Spectrum Sensing Technique for Modern Wireless Communications
Abstract: Cognitive Radio (CR) has indeed been shown to be a superior way to address the issue of spectrum scarcity in which every wireless system occupies the limited bandwidth spectrum (LBS) allotting to the licensed users. Spectrum holes, which are approximated using spectrum sensing, occur when this LBS is empty in a certain location at a specific moment (SS). The SS is the main objective of CR and various SS techniques …
Published in Journal of VLSI Design Tools and Technology · Vol. 12, Issue 2, 2022 · pp. 1–12 Read article
-
Case Control Analysis on Neurodegeneration Disorders and Autism in Familial Context
Abstract: Neurodegenerative disorders such as Parkinson's and Alzheimer's co-occur with autism spectrum disorder (ASD), indicating shared genetic factors. Oxidative stress and inflammation play roles, with an elevated risk of Parkinson's and dementia in individuals with autism spectrum disorder. Antioxidant levels are linked to language and behaviour in autistic children. In the present study, a systematic review and meta-analysis was done following the PRISMA guidelines, reviewing English articles (2002- 2022) on familial …
Published in Research and Reviews: A Journal of Neuroscience · Vol. 13, Issue 2, 2023 · pp. 31–39 Read article
-
A Visible Light-based Indoor Navigation and Localization Solution for Visually Criticized Users
Abstract: Visible Light Communication is seen as a promising option for 5G communication because to its characteristics such as operating in a non-licensed frequency spectrum, offering high bandwidth, using minimal power, and being immune to electromagnetic interference. This property allows light waves to transmit data faster and convey more information, making VLC a promising solution for providing universal electronic navigation assistance to visually challenged individuals. VLC utilizes the visible light spectrum …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 10, Issue 2, 2023 · pp. 22–34 Read article
-
A Case Study of Free Space Optic Performance Using Simulation Tools – OptSim
Abstract: ABSTRACTFree space optics (FSO) has received a great deal of attention lately both in the military and civilian information society due to its potentially high capacity, rapid deployment, portability and high security from deception and jamming. A proper understanding of optical signal propagation in different atmospheric conditions has become essential, and thus there arises the need to rationalize the effects of atmospheric channel on terrestrial FSO links. This paper studies …
Published in Trends in Opto-electro & Optical Communication · Vol. 1, Issue 1-3, 2011 · pp. 1–7 Read article