Outage probability of two-way amplify-and-forward relaying system with interference-limited relay

Shen, Jiayan; Sha, Nan; Cai, Yong; Cai, Chang; Yang, Weiwei

doi:10.1109/wcsp.2011.6096770

Cited by 11 publications

(22 citation statements)

References 15 publications

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“…The randomness in topology of a region can also hinder the propagation of interfering signals in certain directions because of shadowing, so that the source terminals that are far from the cell edge experience negligible interference and are mostly dominated by AWGN noise [19]. The assumption of noise-limited source terminals and CCI at the relay has been widely considered for 2P-TWR systems in [18,20,21] and for unidirectional systems in [19,22,23]. While [18][19][20][21][22] consider a purely interference-limited relay, in this work we consider the combined effect of interference and AWGN at the relay.…”

Section: Motivationmentioning

confidence: 99%

“…The assumption of noise-limited source terminals and CCI at the relay has been widely considered for 2P-TWR systems in [18,20,21] and for unidirectional systems in [19,22,23]. While [18][19][20][21][22] consider a purely interference-limited relay, in this work we consider the combined effect of interference and AWGN at the relay. For this system model, we derive an expression for combining coefficient that performs SNR-balancing and minimises the outage probability.…”

Section: Motivationmentioning

confidence: 99%

“…The source terminals T a and T b are noise-limited, whereas the relay terminal T r is affected by both interference and noise. The T a ↔ T b , T a ↔ T r and T b ↔ T r channels are reciprocal [19][20][21][22]. All channels experience independent Rayleigh block-fading, and the circular symmetric complex Gaussian channel coefficients do not change for the entire round of data exchange.…”

Section: System Modelmentioning

confidence: 99%

“…(1/g s V ab ) exp (−t/g s V ab ) into (19) and performing the integration, we obtain a closed form expression (21) for outage probability (see (21)) where c(g s , g r , V ar , V br ) W (1/g r V ar ) + (1/g r V br ) + 1+ L l=0 g Ir,l V Ir,l g s V ar…”

Section: Outage Probabilitymentioning

confidence: 99%

“…P OTWR out (R) ≃ 1 − g s V ab c(g s , g r , V ar , V br ) exp (−(2 1.5R − 1)/g s V ab ) − exp (−(2 1.5R − 1)c(g s , g r , V ar , V br )) g s V ab c(g s , g r , V ar , V br ) − 1 (21) www.ietdl.org…”

Section: Outage Probabilitymentioning

confidence: 99%

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Performance of optimal three‐phase two‐way system with relay interference

Mandpura¹,

Prakriya

2014

IET Communications

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In this work, the authors consider an amplify-and-forward (AF)-based three-phase two-way system with interference at the relay. An optimum scheme to minimise the outage probability is formulated, and a closed form expression for the 'channeldependent' combining coefficient 'α' at the relay is derived. A novel approach is presented to derive an expression for the overall outage probability of the proposed three-phase outage-optimal two-way relaying (3P-OTWR) system. The authors also perform finite signal-to-noise (SNR) diversity-multiplexing tradeoff and throughput analysis of the system. Furthermore, the problem of outage-optimum power allocation is investigated. Using the asymptotic expression for the outage probability, it is shown that there is loss of diversity owing to interference at the relay. The authors perform Monte Carlo simulations to demonstrate that the 3P-OTWR system outperforms a conventional three-phase two-way scheme. With outage-optimum power allocation, the proposed scheme achieves a gain of approximately 3 dB in the medium-to-high SNR regime over a conventional scheme with α = 0.5 and equal power at terminals. The proposed three-phase scheme in presence of co-channel interference can provide a better throughput for higher transmission rates as compared with a two-phase scheme when operated in the high SNR regime. Numerical results demonstrate accuracy of the derived expressions.

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