Ergodic Capacity Analysis of Cooperative Amplify-and-Forward Relay Networks Over Rice and Nakagami Fading Channels

Modi, Bhuvan

doi:10.5121/ijwmn.2012.4107

Cited by 24 publications

(33 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The interference from the cellular user is assumed as d Ci (i = 1, 2, R) = 4. Results reveal that the optimal scheme in (22) outperforms the equal power allocation considerably. The closer the relay node to the D2D user, the greater improvement the optimal scheme.…”

Section: Numerical Resultsmentioning

confidence: 78%

See 1 more Smart Citation

Outage probability of device‐to‐device communication assisted by one‐way amplify‐and‐forward relaying

Wang

Jin

et al. 2015

IET Communications

View full text Add to dashboard Cite

This study investigates the outage probability of device-to-device communication assisted by a relay node utilising a one-way amplify-and-forward relaying strategy. The authors assume that all the terminals are equipped with a single antenna and all the users know perfect channel state information. They first derive the exact closed-form expression for characterising the outage probability performance of the system. They subsequently discuss several special scenarios and obtain the asymptotic results for each of the considered scenarios. The results can be easily computed with only the channel statistics. Based on the analysis in the high signal-to-noise ratio regime, closed-form power allocation policies are developed to improve the outage probability performance. The author's analytical results are validated via Monte Carlo computer simulations.

show abstract

Section: Numerical Resultsmentioning

confidence: 78%

“…Fig. 3 reveals the gains of outage probability by the optimised strategy in (22). The curves are plotted against the distance between the cellular user and the D2D user d Ci (i = 1, 2, R) for different distances between the BS and the D2D user d Bi (i = 1, 2, R).…”

Section: Numerical Resultsmentioning

confidence: 99%

Outage probability of device‐to‐device communication assisted by one‐way amplify‐and‐forward relaying

Wang

Jin

et al. 2015

IET Communications

View full text Add to dashboard Cite

show abstract

“…The MGF for upper bound of i γ for two-hops relayed path with i.n.d statistics is given by [14] k {( , ),( , )}…”

Section: B Rice Fading Channelmentioning

confidence: 99%

Improving the Spectral Efficiency of Amplify-and-Forward Cooperative Relay Network with Adaptive M-QAM Modulation

Modi

Annamalai

2011

2011 Proceedings of 20th International Conference on Computer Communications and Networks (ICCCN)

Self Cite

View full text Add to dashboard Cite

This paper investigates the performance of cooperative amplify-and-forward (CAF) relay networks with adaptive M-ary quadrature amplitude modulation (M-QAM) technique in Nakagami-m and Rice wireless fading environments. We derived closed form upper bound expression for the marginal MGF of end-to-end SNR of CAF relay system in Nakagami-m fading to compute average bit error rate (ABER), mean achievable spectral efficiency, and outage probability performance metrics. Additionally, along with the above bounding techniques, we have adopted an accurate approximate MGF of end-to-end SNR of CAF relay system to compute above mentioned performance metrics. Employing the above novel approach based on "approximate MGF" allows us to simplify the computation complexity of achievable spectral efficiency as well as ABER of CAF relay system in generalized fading environments by simply replacing appropriate single channel MGF as readily available. The accuracies of our analytical results have been validated via Monte Carlo simulations.Index Terms -----cooperative communications, wireless link adaptation, adaptive M-QAM modulation. I. MOTIVATIONThe demand for wireless communication system in recent years has necessitated a need to improve the performance, reliability and data rate of wireless channels. To address these needs, several attempts have been made on each of these improvement areas. The broadcast nature of wireless transmissions has enabled a new communication paradigm known as "cooperative communication" where the source node communicates with a destination node with the help of one or more relay nodes to harness the new form of spatial diversity and combat multipath fading. This introduced additional reliability improvements. Adaptive transmission is yet another powerful wireless communication technique for improving the spectral efficiency wherein the signal constellation size, power level and/or coding rate are "matched" to the prevailing channel conditions based on the acquired channel-side-information (CSI) on the feedback channel. Although there have been extensive prior work on performance analyses of non-adaptive (i.e., fixed-rate or fixed-power) cooperative diversity systems and also on adaptive transmission techniques for traditional (noncooperative) wireless networks, the art of adaptive link layer in cooperative wireless networks is still in its infancy [1]- [3]. But theoretical studies of such systems would be of interest to several emerging IEEE 802 standards such as 802.11s and 802.16j that are considering the use of cooperative techniques in their multi-hop relay architecture for enhancing coverage, throughput, and network capacity.In this paragraph a brief review of prior research on cooperative diversity with adaptive transmission is discussed. The problem of optimal power allocation in wireless relay networks was investigated in [4]-[5], but source rateadaptation was not considered. In [6], the author investigated the adaptive transmission for a two-hop (regenerative and nonregenerative) relay network (...

show abstract

“…Formally, T can be defined as where N c (s) and N c (s′) are the numbers of cognitive users in state s and s ′ respectively, and N p (s) and N p (s ′) are the numbers of primary users in state s and s ′ respectively [35]. The blocking probability P b is defined as…”

Section: Blocking Probability and Forced Termination Probability (Bpftp)mentioning

confidence: 99%

A Study on Quantitative Parameters of Spectrum Handoff in Cognitive Radio Networks

J¹,

Murugesh²

2017

IJWMN

View full text Add to dashboard Cite

The innovation of wireless technologies requires dynamic allocation of spectrum band in an efficient manner. This has been achieved by Cognitive Radio (CR) networks which allow unlicensed users to make use of free licensed spectrum, when the licensed users are kept away from that spectrum. The cognitive radio makes decision, switching from primary user to secondary user and vice-versa, based on its built-in interference engine. It allows secondary users to makes use of a channel based on its availability i.e. on the absence of the primary user and they should vacate the channel once the primary user re-enters and continue their communication on another available channel and this process in the cognitive radio isknown as spectrum mobility. The main objective of spectrum mobility is that, there is no interruption caused due to the channel occupied by secondary users and maintains a good quality of service. In order to achieve better spectrum mobility, it is mandatory to choose an effective spectrum handoff strategy with the capability of predicting spectrum mobility. The handoff strategy with its parameters and its impact is an important concept in spectrum mobility but fairly explored. In this paper an empirical study on quantitative parameters involved in spectrum mobility prediction are discussed in detail. These parameters are studied extensively because they play a vital role in the spectrum handoff process moreover the impact of these parameters in various handoff methods can be used to predict the effectiveness of the system.

show abstract

Ergodic Capacity Analysis of Cooperative Amplify-and-Forward Relay Networks Over Rice and Nakagami Fading Channels

Cited by 24 publications

References 31 publications

Outage probability of device‐to‐device communication assisted by one‐way amplify‐and‐forward relaying

Outage probability of device‐to‐device communication assisted by one‐way amplify‐and‐forward relaying

Improving the Spectral Efficiency of Amplify-and-Forward Cooperative Relay Network with Adaptive M-QAM Modulation

A Study on Quantitative Parameters of Spectrum Handoff in Cognitive Radio Networks

Contact Info

Product

Resources

About