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25 articles for “fading channel”
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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
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A Novel Closed form Expression of OPRA Over κ-μ/Inverse-Gaussian and η-μ/Inverse-Gaussian Fading Channel with Diversity Reception
Abstract: Abstract: In authentic wireless propagation scenario, the execution of the wireless communication is critically degraded by fading phenomenon which is generally multipath and shadowing. Considering more realistic scenario it is very necessary to develop a composite fading model and further analyze its performance metrics. In this work closed form equation of channel capacity under adjustable transmission policy with OPRA over κ-μ/Inverse-Gaussian and ημ/Inverse-Gaussian fading channel with and without maximal ratio …
Published in Journal of Microelectronics and Solid State Devices · Vol. 6, Issue 1, 2019 · pp. 7–11 Read article
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New Analytical Expression of OPRA Over InverseGamma Shadowed Fading Channel with Selection Combining Diversity
Abstract: Abstract: Considering wireless communications, different factors are responsible for attenuation and degradation of signal which is term as fading. Generally fading is divided into two parts large scale fading and small scale fading. It is very essential to develop a fading model that characterizes the channel considering that effects. In this paper analysis of channel capacity under Optimal Power Rate Adaption (OPRA) over Inverse-Gamma shadowed distribution with Selection Combining diversity …
Published in Journal of Microelectronics and Solid State Devices · Vol. 6, Issue 1, 2019 · pp. 18–21 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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Performance Analysis of DE-QPSK and π/4 QPSK with MRC Receiver over η-µ fading channel
Abstract: This study presents approximate but simple expression for the average symbol error rate of differentially encoded quadrature phase shift keying (DE-QPSK) and π/4 QPSK with Maximal Ratio Combining (MRC) diversity over independent η-µ fading channels. Numerical results demonstrate the error performance for different values of fading parameter µ for Lth order MRC for Format 1 and Format 2. Furthermore, error performance of both modulation techniques has also been analyzed for …
Published in Journal of Communication Engineering & Systems · Vol. 8, Issue 3, 2018 · pp. 53–59 Read article
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Analysis of M-MRC Receiver over Nakagami-m Fading Channels using Wireless Information and Power Transfer System
Abstract: AbstractThe expression for the performance of Outage probability and Average bit-error rate (ABER), have been presented in this paper, considering an arbitrary branch Maximal Ratio Combining (MRC) Receiver, over Nakagami-m Fading Channels using simultaneous wireless information and power transfer (SWIPT). For the SWIPT system, a Power splitter (PS) at the receiver side has been employed, which splits the received signal into the information transmitter and the energy harvesting parts. A …
Published in Journal of Communication Engineering & Systems · Vol. 9, Issue 1, 2019 · pp. 49–54 Read article
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Outage Probability of TAS/MRC Systems over Nakagami-m Fading Channels with Correlation
Abstract: This paper analyzes the outage probability of a multiple-input multiple-output (MIMO) transmit antenna selection with a maximal ratio combining (TAS/MRC) system considering equal and exponential correlation among the input branches of MRC receiver. In TAS/MRC system the transmitter selects the best antenna out of the total transmit antennas based on the channel state information (CSI) of each user. A closed form expression has been derived for outage probability considering Nakagami-m …
Published in Journal of Electronic Design Technology · Vol. 7, Issue 1, 2016 · pp. 39–45 Read article
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BER Performance Analysis of MIMO With and Without Beamforming and Relaying Techniques
Abstract: The exponential surge in data traffic within contemporary communication systems has given rise to a challenge: a shortage in system information rates. To address these pressing issues, large-scale multiple-input multiple-output (MIMO) techniques have emerged as a promising solution. These advanced techniques not only enhance energy efficiency but also optimize spectrum performance, positioning themselves as a pivotal cornerstone for the forthcoming evolution of wireless communication systems. In wireless communication systems, fading …
Published in Journal of Microwave Engineering and Technologies · Vol. 10, Issue 2, 2023 · pp. 1–7 Read article
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A New Analytical Expression of ASEP with MRC Diversity Over Composite Model of α-μ/Inverse Gaussian Fading Distribution
Abstract: AAbstract: Average Symbol Error Probability (ASEP) is an important performance metrics to evaluate the performance of any wireless communication system, under different modulation schemes over a fading channel. The phenomenon of shadowing and multipath fading are the two important factors which affect wireless communication. Composite modeling is an approach to accustom the effects of both simultaneously. This paper analyzes the performance of a wireless communication system over a composite model …
Published in Journal of Microelectronics and Solid State Devices · Vol. 6, Issue 1, 2019 · pp. 1–6 Read article
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Performance Evaluation of Multiple Data Rates Flying Ad Hoc Networks Using Rayleigh Fading
Abstract: AbstractAn exertion has been made to delineate the execution of the Rayleigh fading channel models by utilizing QualNet test system as far as QoS parameters are concerned. A situation has been created here for the Rayleigh fading channels with different parameters. The parameters such as data rate and speed of nodes play very important role in the performance analysis and design of the flying ad hoc network over the multipath …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 5, Issue 2, 2018 · pp. 8–14 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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A New Analytical Expression of Channel Capacity with MRC Diversity Over Composite Model of α-μ/Inverse Gaussian Fading Distribution
Abstract: Abstract: Fading in a wireless communication system occurs basically due to two phenomena, multipath fading, and shadowing. A realistic scenario would comprise of both the phenomenon occurring simultaneously. Such a scenario is frequently characterized by a composite model of multipath/shadowing fading. In this work, a novel expression for the composite model of αμ/Inverse-Gaussian (IG) distribution with MRC diversity is obtained using the GaussLaguerre integration technique. Further utilizing the obtained expression …
Published in Journal of Microelectronics and Solid State Devices · Vol. 6, Issue 1, 2019 · pp. 22–29 Read article
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Comprehensive Study of Least Squares Estimation in Fast Fading MIMO-OFDM Systems
Abstract: MIMO-OFDM technology is now the foundation for modern wireless communication systems, allowing dramatic improvements in spectral efficiency, power efficiency, and transmission rate. On the other hand, the least accurate channel estimation is still a critical task, especially when they are in fast-fading environments. This study gives a comprehensive survey of LSE-based approaches and their applications on different fast-fading channel models for MIMO-OFDM systems. Techniques like Pilot Assisted Channel Estimation (PACE), …
Published in Journal of Microwave Engineering and Technologies · Vol. 12, Issue 1, 2025 · pp. 13–21 Read article
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Performance Analysis of DWT Based OFDM System using SRRC Filter in Mobile Wimax over Fading Environment
Abstract: AbstractWavelets amid its capability to provide simultaneous information in both time and frequency domain, along with minimization of interference and improved bandwidth efficiency, is considered broadly as an efficient approach to replace fast Fourier transform (FFT) in the conventional orthogonal frequency division multiplexing (OFDM) systems. Efficient filter pulses are employed spectrally in such systems in order to mitigate the effect of inter-symbol interference (ISI) as well as satisfy the bandwidth …
Published in Journal of Communication Engineering & Systems · Vol. 7, Issue 1, 2017 · pp. 1–10 Read article
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BER Improvement in Fading Conditions Using QAM
Abstract: AbstractThe future mobile network requires huge capacity, coverage, energy efficiency and spectral efficiency. In different fading conditions, like Gaussian noise channel, Rician fading and Rayleigh fading conditions, higher order QAM can improve spectral efficiency by improving bit error rate. Additive white Gaussian noise model describes the effect of random processes in nature. Rayleigh distribution has static time varying nature on the receiver side. The envelope of Rician fading is small …
Published in Trends in Opto-electro & Optical Communication · Vol. 7, Issue 2, 2017 · pp. 1–6 Read article
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Numerical Modelling and Simulation of Improved Partial Transmit Sequence for PAPR Reduction in OFDM Communication System
Abstract: Channel capacity and peak average to power ratio are essential elements in offering dependable communication through wireless medium in this competing wireless communication system. The rating of an amplifier in an OFDM system, as well as prospective future candidates of 5G systems such as FBMC and UFMC, is affected by a high peak to average power ratio. The demand for channel capacity fluctuates due to the growing number of wireless …
Published in Recent Trends in Electronics Communication Systems · Vol. 8, Issue 3, 2021 · pp. 33–39 Read article
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Performance Analysis of Flying Ad Hoc Network with Different Antennas Using Ricean Fading
Abstract: AbstractWith regards to FANET, utilization of directional antenna can to a great extent decrease the radio interference, in this way enhancing the use of wireless medium and thus the system throughput. Execution of FANET is low under the omnidirectional antenna system contrasted with smart antenna system when Ricean fading model is utilized. Directional antenna covers huge zone and transmits extensive no. of packets, since it centers in the desired direction …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 5, Issue 2, 2018 · pp. 1–7 Read article
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Analysis of Cognitive Radio Spectrum Sensing Algorithms Using Various Noise Channels
Abstract: As we know that now a day’s there is a huge advancement in wireless communication and its applications, efficient use of spectrum has been a great issue for researchers. Due to such issue, development in cognitive radio (the intelligent network) has been in demand which will analyze the spectrum to increase its efficiency by utilizing it properly. This paper focuses on sensing the spectrum in order to find out the …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 2, Issue 2, 2015 · pp. 11–16 Read article
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Analysis of a Communication Link Performance Across Various Rayleigh Channels in Tropical Climates
Abstract: Tropical regions are characterized by intense and persistent rainfall throughout most of the year, and this environmental condition significantly influences wireless communication performance. The continuous presence of heavy precipitation weakens, scatters, and disrupts radio frequency signals, causing noticeable attenuation during transmission from the source to the destination. As a result, reliable communication becomes challenging, particularly for modern high-speed systems such as 5G networks. To address this limitation and enhance communication …
Published in Journal of Communication Engineering & Systems · Vol. 16, Issue 1, 2026 · pp. 06–12 Read article
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On the Trade-Off between Information Rate and Power Transfer for Multiuser Scheduling Schemes under Rayleigh Fading
Abstract: With the evolution of wireless communication technologies, the need for green communication and energy saving becomes more critical than ever. The lifetime of a battery-powered network usually depends on the battery capacity. RF energy harvesting is a promising technique to prolong the battery lifetime effectively. The performance of multiuser scheduling schemes for a time-slotted system with simultaneous wireless information and power transfer under Rayleigh fading channel is studied in this …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 3, Issue 2, 2016 · pp. 13–20 Read article