Power-optimized amplify-and-forward multi-hop relaying systems

Farhadi, Golnaz; Beaulieu, N.C.

doi:10.1109/twc.2009.080987

Cited by 58 publications

(38 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All these traditional routing algorithms usually impose a minimum received power constraint over each individual link along the path to obtain the routing metrics. At the physical layer, many power allocation schemes have been investigated to maximise energy efficiency and system performance of a wireless multihop path [4][5][6]. The authors in [6] have analysed power allocation problems that minimise total transmit power of multihop relay path subject to a target end-to-end bit error rate (BER) constraint.…”

Section: Introductionmentioning

confidence: 99%

Energy‐efficient joint routing and power allocation optimisation in bit error rate constrained multihop wireless networks

Gupta

Bose²

2015

IET Communications

View full text Add to dashboard Cite

Energy efficiency is a crucial design issue in energy-constrained wireless networks to ensure uninterrupted information exchange. With the requirement of average end-to-end bit error rate (BER), the problem of joint routing and power allocation optimisation in multihop wireless network is studied here for two network power management policies: one is to minimise overall transmit power and the other is to maximise network lifetime. The proposed minimum total power strategy is optimal for minimising the overall transmit power consumption in the network and is preferable in network with tethered energy resources. To maximise the lifetime of a network with battery-operated nodes, the authors have developed two residual energy-aware joint routing and power allocation strategies: path lifetime maximisation (PLM) strategy and minimum weighted total power (MWTP) strategy. A distributed implementation for these strategies is also presented. Simulation results demonstrate that the proposed strategies achieve significant power saving and prolong network lifetime considerably over traditional routing algorithm with individual link BER constraint. It has also been shown that at reasonably low route refresh interval, the MWTP strategy performs best in terms of network lifetime, whereas at very high route refresh interval, the PLM strategy is optimal for network lifetime maximisation.

show abstract

Section: Introductionmentioning

confidence: 99%

Energy‐efficient joint routing and power allocation optimisation in bit error rate constrained multihop wireless networks

Gupta

Bose²

2015

IET Communications

View full text Add to dashboard Cite

show abstract

“…But utilising coding substantially improves the performance; however, design of transmission scheme using AMC is different and more complicated. Performance analysis of AF relay network with continuous link adaptation is addressed by Hasna and Alouini (2004), Seddik, Sadek, Su, and Liu (2007) and Farhadi and Beaulieu (2009).…”

Section: Introductionmentioning

confidence: 99%

Optimised secure transmission through untrusted AF relays using link adaptation

Taki

Sadeghi

2015

International Journal of Electronics

View full text Add to dashboard Cite

A new transmission scheme is presented for a two-hop relay network including two AF relays, considering physical layer security where relays are not able to detect signal with an acceptable bit error rate (BER) but the combined received signal is detected with an acceptable BER at the final receiver. It is assumed that there is no direct path between the transmitter and the receiver (relay network without diversity). Adaptive modulation and coding is utilised at the transmitter and transmission powers of the transmitter and of the relays are continuously adapted provisioning individual average power constraint for each node. Numerical evaluations show that an acceptable performance degradation is seen by the proposed secure relaying scheme compared to the optimum relay selection scheme without security constraint. ARTICLE HISTORY

show abstract

“…Many research efforts have been devoted to investigate the performance improvement of relay networks by optimally allocate the radio resources [15][16][17]. It is worth mentioning that dual-hop relaying scheme is typically considered in the aforementioned studies and power-optimized multi-hop relaying is only studied in [17].…”

Section: Introductionmentioning

confidence: 99%

Performance analysis and power allocation for multi-hop multi-branch amplify-and-forward cooperative networks over generalized fading channels

Mohammadi

Ardebilipour

Mobini

et al. 2013

J Wireless Com Network

View full text Add to dashboard Cite

In this article, efficient power allocation strategies for multi-hop multi-branch amplify-and-forward networks are developed in generalized fading environments. In particular, we consider the following power optimization schemes: (i) minimizing of the all transmission powers subject to an outage constraint; and (ii) minimizing the outage probability subject to constraint on total transmit powers. In this study, we first derive asymptotically tight approximations for the statistics of the received signal-to-noise ratio (SNR) in the system under study with maximal ratio combining and selection combining receiver. With the statistical characterization of the received SNR, we then carry out a thorough performance analysis of the system. Finally, the asymptotic expression of the outage probability is used to formulate the original optimization problems using geometric programming (GP). The GP can readily be transformed into nonlinear convex optimization problem and therefore solved efficiently and globally using the interior-point methods. Numerical results are provided to substantiate the analytical results and to demonstrate the considerable performance improvement achieved by the power allocation.

show abstract

Power-optimized amplify-and-forward multi-hop relaying systems

Cited by 58 publications

References 17 publications

Energy‐efficient joint routing and power allocation optimisation in bit error rate constrained multihop wireless networks

Energy‐efficient joint routing and power allocation optimisation in bit error rate constrained multihop wireless networks

Optimised secure transmission through untrusted AF relays using link adaptation

Performance analysis and power allocation for multi-hop multi-branch amplify-and-forward cooperative networks over generalized fading channels

Contact Info

Product

Resources

About