Performance analysis of OFDM based AF cooperative systems in selection combining receiver over Nakagami‐<i>m</i> fading channels with nonlinear power amplifier

Kumar, Nagendra; Bhatia, Vimal

doi:10.1002/dac.3149

Cited by 9 publications

(1 citation statement)

References 39 publications

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“…More specifically, all these impairments can affect the performance of the wireless link and make it unreliable for transmission. Therefore, diversity techniques have been proposed to alleviate the effect of multipath fading and hence improve the overall performance of the communication system [5][6][7][8]. This is based on providing multiple fading channels between the transmitter and receiver to reduce the probability of error.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of cognitive relay networks for end user mobile over mixed realistic channels

2022

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Cognitive relay network is a spectrum dynamic paradigm that exploits the unused portions of the licensed spectrum. This is based on merging both cooperative relaying techniques and cognitive radio network to achieve spectrum efficiency and enhance the overall system performance. In this paper, the presence of mobile users at the destination node is considered. Here, the end users can navigate at relatively fast vehicular velocities causing dynamic multipath fading and high Doppler shift. which can be fairly modeled using Nakagami−𝑚 fading channel (i.e., 𝑚 < 1). In a spectrum scarcity environment, a secondary user must deploy an optimal power allocation policy to get higher transmission rates while the overall interference affecting the primary user (PU) is kept below a certain threshold value. In particular, the outage probability performance is studied over the mixed Rayleigh and Nakagami−𝑚 fading channels for different scenarios based on the statistical characteristics of signal-to-noise ratio. The first scenario is the cognitive dual hop amplify and forward relay network over independent and non-identical (i.n.i.d) distributed mixed fading channels. In the second scenario, the cognitive relay network consists of a single amplify and forward relay in addition to the direct link transmission with a selection combining at the destination over i.n.i.d distributed mixed fading channels. Numerical results are presented to evaluate the impact of the fading parameter, 𝑚, the maximum aggregated intrusion constraint, and the locations of the primary users (PUs) on different channel scenarios at high vehicular speeds.

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Section: Introductionmentioning

confidence: 99%

Performance evaluation of cognitive relay networks for end user mobile over mixed realistic channels

2022

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A comprehensive analytical perspective of ASEP for Beaulieu‐Xie fading channels

Bilim

2022

Int J Communication

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Summary This study presents the average symbol error probability (ASEP) performance of a single‐input single‐output communication with imperfect phase error (IPE) and without IPE over the Beaulieu‐Xie fading channels. The Beaulieu‐Xie fading model is proposed recently and it is a popular characterization for the line‐of‐sight and non‐line‐of‐sight environments. The proposed theoretical analysis, which is based on the probability density function, is enough general and applicable in some real‐life scenarios. For both cases, closed‐form exact, approximate, and asymptotic expressions are derived for the ASEP of different modulation types. Finally, exact simulations have been introduced to confirm the accuracy of the theoretical findings obtained and present insights into the considered scheme performance.

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On ASER Analysis of Energy Efficient Modulation Schemes for a Device-to-Device MIMO Relay Network

2020

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In this paper, we investigate the performance of a device-to-device (D2D) multiple-input and multiple-output (MIMO) communications using an amplify-and-forward relaying for various energy-efficient modulation schemes. For analysis, transmit antenna selection strategy is employed at the transmitter to select the best transmit antenna which maximizes the received signal power. In the analysis, we optimized the relay location to obtain the lowest outage probability possible and derived the generalized upper-bound average symbol error rate expressions of energy-efficient futuristic modulation schemes such as square quadrature amplitude modulation (QAM), rectangular QAM, cross QAM, and hexagonal QAM for D2D network. Further, we have derived the ergodic capacity expression to calculate the achievable rates. Comparative analysis of different QAM schemes for various constellation orders is also presented. Furthermore, the impact of the relative position of relay, path loss, and the number of antennas are also highlighted. Finally, the derived analytical results are verified through Monte-Carlo simulations.

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Performance analysis of OFDM based AF cooperative systems in selection combining receiver over Nakagami‐m fading channels with nonlinear power amplifier

Cited by 9 publications

References 39 publications

Performance evaluation of cognitive relay networks for end user mobile over mixed realistic channels

Performance evaluation of cognitive relay networks for end user mobile over mixed realistic channels

A comprehensive analytical perspective of ASEP for Beaulieu‐Xie fading channels

On ASER Analysis of Energy Efficient Modulation Schemes for a Device-to-Device MIMO Relay Network

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