Outage analysis of nonorthogonal in‐band relay‐aided device‐to‐device communications in Rayleigh fading channels

Moghaddam, Shahriar Shirvani

doi:10.1002/itl2.8

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…In the first one, regarding the signal quality, minimizing the outage probability and in the second one, in view of the traffic and the desired throughput, maximizing the throughput can be achieved. In an in-band underlay manner, in addition to considering the noise effects and multi-path fading phenomenon, it is necessary to add the effect of interference arising from the reused radio resources [37,38]. With the help of fixed or mobile relay nodes, the distance between the transmitter and receiver nodes of a D2D pair increases and the quality of service (QoS) improves.…”

Section: D2d Communicationsmentioning

confidence: 99%

Introductory Chapter: Primary and Secondary Users in Cognitive Radio-Based Wireless Communication Systems

Moghaddam¹

2018

Cognitive Radio in 4g/5g Wireless Communication Systems

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Additional information is available at the end of the chapter 1. Wireless communications and the necessity of cognitive radio Wireless communication systems play a special role in human life, facilitate the life, and change the world much more in the future. The diversity of applications and services of wireless communications indicates the widespread use of wireless systems and equipment in the future. Since the first radio link by Marconi in 1896, it has been more than 120 years, and several wireless communication systems have been introduced up to now. Meanwhile, the advancement of cellular wireless communications, whose idea came back to 1947 and their first generation in 1978 (namely advanced mobile phone service), has been well adopted and has grown dramatically, so that the researchers and operators are focused on standardization and design of 5G and 6G wireless communication systems [1]. From the beginning, one of the main problems in wireless communications is the scarcity of radio resources (frequency, time, and power). In recent years, the lack of frequency spectrum and the necessity of frequency reuse at different times and places and reduction of the consumed power are of great importance. Looking at the following laws: • Moore's law: The number of transistors that can be cheaply placed on a microchip doubles and the computer power exponentially increases approximately every 2 years [2] • Cooper's law: The number of voice calls or data that can be sent over the usable radio spectrum doubles every 30 months [2]

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Section: D2d Communicationsmentioning

confidence: 99%

Introductory Chapter: Primary and Secondary Users in Cognitive Radio-Based Wireless Communication Systems

Moghaddam¹

2018

Cognitive Radio in 4g/5g Wireless Communication Systems

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“…Recently, Ref. [11] derived two closed-form expressions for the outage probability of non-orthogonal in-band AF and DF relay-aided D2D communications in Rayleigh channels. According to the numerical analyses of this investigation, it was indicated that in the low-noise regime, AF outperforms DF while they perform very close to each other in the moderate noise level and DF outperforms AF in the high-noise power.…”

Section: Introductionmentioning

confidence: 99%

“…On the contrary, the obtained low-complex closed-form expressions are just valid for high-enough SINRs. In addition, it is clear that the formulations and results of [11] are not applicable for relay-aided D2D communications in Nakagami fading channels and does not exist any low-complex outage probability expression for the DF relay-aided D2D communications appropriate for all SNRs in a Nakagami fading channel.…”

Section: Introductionmentioning

confidence: 99%

Outage Analysis of Energy Harvested Relay-Aided Device-to-Device Communications in Nakagami Channel

Moghaddam

2018

JCOMSS

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In this paper, a low-complexity closed-form formula for the outage probability of the energy-harvested direct and decode-and-forward (DF) relay-aided underlay device-to-device (D2D) communications in Nakagami fading channel is derived. By proposing a new procedure, the power splitting factor in simultaneous wireless information and power transfer (SWIPT) energy-harvesting system is easily found such that the transmit power of the transmitter node in the direct and the relay node in a relay-aided D2D communications is fixed in a pre-defined value. Using the proposed procedure, the obtained closed-form expression is valid for both energy-harvested and non-energyharvested scenarios. This formula is based on n-point generalized Gauss-Laguerre and m-point Gauss-Legendre solutions. It is shown that n is more effective than m for reducing the formula complexity. In addition to a good agreement between the simulation results and numerical analysis based on normalized mean square error (NMSE), it is indicated that (n, m)=(1, 4) and (n, m)=(1, 2) are the appropriate choices, respectively for 0.5≤ µ <0.7 and µ ≥0.7, where µ is the fading shape factor. As shown in this investigation, increasing the average distance between the D2D pair and cellular user introduces lower interference, which is the reason for decreasing the outage probability. Furthermore, it is clear that increasing the Nakagami fading shape factor is the reason for decreasing the depth of fading, its fluctuations and the outage probability. Index Terms-Device to device (D2D) communications, Decodeand-forward (DF), Energy harvesting (EH), Simultaneous wireless information and power transfer (SWIPT), Gauss-Legendre/Gauss-Laguerre, Nakagami, Outage probability. Research works [2, 3], obtained closed-form formulas for the outage probability of direct underlay/overlay D2D communications in a Rayleigh channel. In Ref. [7], the exact formulas for the outage probability of in-band direct D2D communications underlying cellular network in a Rayleigh channel were proposed. The proposed model considers two radio resources reuse scenarios, one-reuse and two-reuse. The authors of [8] exploited stochastic geometry, Laplace transforms, and probability density function (pdf) to calculate the outage probability in a tractable manner.

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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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Outage analysis of nonorthogonal in‐band relay‐aided device‐to‐device communications in Rayleigh fading channels

Cited by 4 publications

References 15 publications

Introductory Chapter: Primary and Secondary Users in Cognitive Radio-Based Wireless Communication Systems

Introductory Chapter: Primary and Secondary Users in Cognitive Radio-Based Wireless Communication Systems

Outage Analysis of Energy Harvested Relay-Aided Device-to-Device Communications in Nakagami Channel

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

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