Jointly optimal precoder and power allocation for an amplify-and-forward half-duplex relay system

Rodríguez, Leonardo Jiménez; Tran, Nghi H.; Le‐Ngoc, Tho

doi:10.1109/atc.2010.5672703

Cited by 5 publications

(11 citation statements)

References 12 publications

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“…Equivalently, it turns out that using HD orthogonal AF together with a superposition constellation is asymptotically optimal. This behavior is similar to that in HD relaying shown in [30], [31]. For dual-hop systems, the asymptotic analysis indicates that their diversity functions are dependent on λ.…”

Section: Introductionsupporting

confidence: 66%

“…This diversity function is the same as the one obtained for the uncoded HD non-orthogonal AF system studied in [28] and [30]. Thus, any precoder with |u 1 | = |g 1 | = 0 for 0 < λ ≤ 1 or U = 0 for λ = 0 offers a full-diversity performance for the uncoded linear relaying system.…”

Section: A Linear Relaying Analysismentioning

confidence: 59%

“…Note that when L = 2, FD linear relaying reduces to HD non-orthogonal AF and it is not hard to verify from [28] and [30] that…”

Section: A Linear Relaying Analysismentioning

confidence: 99%

“…Insights into the precoder design shall also be discussed. Our analysis is applicable to any L ≥ 3 and can thus be considered as a generalization of the HD nonorthogonal AF studies in [28] and [30] for uncoded and in [31] for coded scenarios.…”

Section: A Linear Relaying Analysismentioning

confidence: 99%

“…Asymptotic pairwise error probability and BER expressions in high transmission power regions are then obtained. Based on these expressions, it is shown that FD linear relaying systems can achieve the same diversity function as their HD counterparts [28], [30], [31] for any 0 ≤ λ ≤ 1 as long as a suitable precoder at the source is applied. Different from previous works where the direct link is treated as interference, a non-zero diversity order is attained and no error floor is observed despite the self-interference in FD.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Performance of Full-Duplex AF Relaying in the Presence of Residual Self-Interference

Rodríguez

Tran

Le‐Ngoc

2014

IEEE J. Select. Areas Commun.

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188

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This paper investigates the error and diversity performances of full-duplex (FD) amplify-and-forward (AF) singlerelay systems under the effect of residual self-interference. The variance of this interference is assumed to be proportional to the λ-th power of the transmitted power (0 ≤ λ ≤ 1). The study considers the cooperative linear relaying protocol with direct source-destination link and the dual-hop scheme without direct link, both under uncoded and coded frameworks. At first, closedform pairwise error probability expressions are derived for the uncoded systems, which are then used to obtain tight bounds to the bit error rate (BER) of the coded systems. To shed an insight on the diversity behavior, asymptotic expressions at high transmission powers are also presented. Different from previous works that treat the direct link as interference, this paper shows that FD linear relaying systems with a suitable precoder can attain the same diversity function as their half-duplex (HD) counterparts. However, further analysis shows that HD orthogonal AF using a superposition constellation is asymptotically optimal in terms of maximum coding gain. In addition, it is shown that the diversity of FD dual-hop systems is a decreasing function of λ and is equal to zero when λ = 1. Although HD relaying is asymptotically optimal under the considered protocols and interference model, illustrative results show that FD relaying is advantageous at practical BER levels when λ is sufficiently small.

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Section: Introductionsupporting

confidence: 66%

Section: A Linear Relaying Analysismentioning

confidence: 59%

“…Note that when L = 2, FD linear relaying reduces to HD non-orthogonal AF and it is not hard to verify from [28] and [30] that…”

Section: A Linear Relaying Analysismentioning

confidence: 99%

Section: A Linear Relaying Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%