Performance analysis of dual-hop fixed-gain AF relaying systems with OSTBC over Nakagami-m fading channels

Altunbaş, İbrahim; Yılmaz, Ahmet; Kucur, Şerife Seda; Kucur, Oğuz

doi:10.1016/j.aeue.2012.02.002

Cited by 15 publications

(9 citation statements)

References 29 publications

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“…Following [16, 18], the squaring approach method is considered to decode OSTBCs at the destination. Accordingly, the average signal power for a symbol

s_{k}

(

1 \leq k \leq K

) and noise power at the destination can be written, respectively, as

P_{t} = α^{4} {(∥ {bold-italich}_{S R} ∥_{F}^{2})}^{2} {(∥ {bold-italich}_{R D} ∥_{F}^{2})}^{2} E (][, | s_{k} |^{2})

\begin{matrix} right left right left right left right left right left right left0.278em 2em 0.278em 2em 0.278em 2em 0.278em 2em 0.278em 2em 0.278em3pt \\ P_{w} = & α^{2} (∥ {bold-italich}_{S R} ∥_{F}^{2}) (∥ {bold-italich}_{R D} ∥_{F}^{2}) \times \{α^{2} | {\overset{false~}{h}}_{R R} |^{2} (∥ {bold-italich}_{R D} ∥_{F}^{2}) \\ E [| {\overset{false~}{s}}_{R} [n - τ] |^{2}] + α^{2} (∥ {bold-italich}_{R D} ∥_{F}^{2}) σ^{2} + σ^{2}\} \end{matrix}

where

{\tilde{h}}_{R R} ≜ h_{R R, l}, {\tilde{s}}_{R} false[n - τ false] ≜ α y_{R, l}, E (][, | s_{1} |^{2}) = E (][, | s_{2} ...)

…”

Section: System Modelmentioning

confidence: 99%

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Performance of dual‐hop full‐duplex relay networks with orthogonal space‐time block coding in Nakagami‐mfading channels

Toka

Kucur

2019

IET Communications

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“…Following [16, 18], the squaring approach method is considered to decode OSTBCs at the destination. Accordingly, the average signal power for a symbol

s_{k}

(

1 \leq k \leq K

) and noise power at the destination can be written, respectively, as

P_{t} = α^{4} {(∥ {bold-italich}_{S R} ∥_{F}^{2})}^{2} {(∥ {bold-italich}_{R D} ∥_{F}^{2})}^{2} E (][, | s_{k} |^{2})

\begin{matrix} right left right left right left right left right left right left0.278em 2em 0.278em 2em 0.278em 2em 0.278em 2em 0.278em 2em 0.278em3pt \\ P_{w} = & α^{2} (∥ {bold-italich}_{S R} ∥_{F}^{2}) (∥ {bold-italich}_{R D} ∥_{F}^{2}) \times \{α^{2} | {\overset{false~}{h}}_{R R} |^{2} (∥ {bold-italich}_{R D} ∥_{F}^{2}) \\ E [| {\overset{false~}{s}}_{R} [n - τ] |^{2}] + α^{2} (∥ {bold-italich}_{R D} ∥_{F}^{2}) σ^{2} + σ^{2}\} \end{matrix}

where

{\tilde{h}}_{R R} ≜ h_{R R, l}, {\tilde{s}}_{R} false[n - τ false] ≜ α y_{R, l}, E (][, | s_{1} |^{2}) = E (][, | s_{2} ...)

…”

Section: System Modelmentioning

confidence: 99%

“…[14] for more than two transmit antennas. Most of the works in the literature investigate OSTBC transmission in MIMO HD relay networks [15–18], but to the best of our knowledge, studies on MIMO FD relaying are quite limited, see e.g. [19–24].…”

Section: Introductionmentioning

confidence: 99%

Performance of dual‐hop full‐duplex relay networks with orthogonal space‐time block coding in Nakagami‐mfading channels

Toka

Kucur

2019

IET Communications

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“…The total transmit power is equally allocated to all active transmit antennas that yields the factor

\frac{1}{L_{i}}

in and . Under the assumption that the channel estimation processes are perfectly carried out at each hop, and the fixed relaying gain

α = \sqrt{\frac{\overset{γ}{true}}{1 + \overset{γ}{true}}}

[, ] is used, the instantaneous end‐to‐end SNR at the destination receiver output can be derived as [, ]

γ_{FGAF}^{(o_{1}, o_{2})} = \frac{γ_{S, 1}^{(o_{1})} γ_{S, 2}^{(o_{2})}}{γ_{S, 2}^{((), o_{2})} + 1 + \overset{γ}{true}}

for dual‐hop FGAF relaying schemes with TAS/OSTBC schemes in both hops. In ,

(o_{i}) = (o_{C, i, 1}, o_{C, i, 2}, \dots, o_{C, i, L_{i}}), i = 1, 2

, and ( o i ) = ( o M , i ), i = 1,2, for conventional and modified schemes, and the label S becomes C or M similarly.…”

Section: System Model and Snr Statisticsmentioning

confidence: 99%

Conventional and modified TAS/OSTBC schemes in dual‐hop fixed‐gain amplify‐and‐forward relaying systems with imperfect feedback

Coşkun

Kucur

2015

Wireless Communications

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Modified transmit antenna selection (TAS)/orthogonal space‐time block coding (OSTBC) (M‐TAS/OSTBC) schemes have been shown to achieve superior error performance together with a reduced‐rate feedback channel in the presence of feedback errors (FEs) when compared with the conventional TAS/OSTBC (C‐TAS/OSTBC) schemes. This paper focuses on the bringing of fixed‐gain amplify‐and‐forward (FGAF) relaying schemes that employ M‐TAS/OSTBC schemes at both hops that provides reduced feedback‐rate and robust error performance in the presence of erroneous‐feedback channels. The exact expressions of the outage and error probabilities for both dual‐hop FGAF relaying schemes in Nakagami‐m fading channels have been derived and validated via Monte Carlo simulations. Additionally, with the help of high signal‐to‐noise ratio (SNR) (i.e., asymptotic) approaches and some analytical approximations, the asymptotic diversity order analysis has been carried out. Besides, by providing a simulation‐based examination on the inclusion of power allocation within the modified scheme, the additional advantages on the performance have been exhibited. The extensive investigation and comparisons to the conventional schemes have shown that M‐TAS/OSTBC schemes employed at each transmission link provide full diversity order and considerable error performance as the C‐TAS/OSTBC scheme in ideal feedback cases and also achieve more robust error performance in the presence of FEs. Thus, by using M‐TAS/OSTBC schemes, the overall performances of the dual‐hop FGAF relaying schemes have been enhanced, which would result in reductions on the average SNR requirements to achieve a specified error rate constraint. Copyright © 2015 John Wiley & Sons, Ltd.

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“…[3]- [5] numaralı çalışmaların sonuçlarına göre, klasik (yaygın) TAS/OSTBC (C-TAS/OSTBC) yapısında kullanılan optimum anten seçimi stratejisi daha yüksek geribesleme yüküne neden olmaktadır ki, bu da, geribesleme kanalı trafigini artırmakla kalmayıp, geribesleme hatalarının varlıgında söz konusu sistemlerin ortalama kesinti ve hata olasılıgı performansında düşüşlere neden olmaktadır. Bunun yanında, OS-TBC yapısı, işbirlikli ve atlamalı haberleşme sistemlerinde, çeşitleme kazancı elde etmek amacıyla her bir dügüm arasındaki işaretleşme için kullanılabilmektedir [8]- [17].İki atlamalı kuvvetlendir-ve-aktar (amplify-and-forward (AF)) ve çöz-ve-978-1-4799-4874-1/14/$31.00 c 2014 IEEE aktar (decode-and-forward (DF)) tipi röleli yapılara ilişkin performans analizleri literatürde çogunlukla anten seçimsiz (saf) OSTBC tekniginin ortalama kesinti ve hata olasılıgı ile ilgilenmiştir. Ayrıca, röleli haberleşme sistemlerinin antenler arası ilişki [14], zaman-senkronizasyon hataları [15], anahtar deligi (keyhole) etkisi [16] ve FE [6] gibi pratik uyumsuzluklar durumundaki performansını ele alan birkaç çalışma da bulunmaktadır.…”

Section: Introductionunclassified

Performance of dual-hop AF relay systems employing modified TAS/OSTBC scheme in both hops in the presence of feedback errors

Cockun

Kucur

2014

2014 22nd Signal Processing and Communications Applications Conference (SIU)

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Özet-Bu çalışmada, Kaynak→Röle ve Röle→Hedef arası her iki işaretleşme adımında da modifiye verici anten seçimli (transmit antenna selection (TAS)) dik uzay-zaman blok kodlama (orthogonal space-time block coding (OSTBC)) yapısını kullanan, Röle→Kaynak ve Hedef→Röle arasındaki geribesleme yükünü azaltan ve geribesleme hataları varlıgında klasik TAS/OSTBC (C-TAS/OSTBC) yapılarına göre daha iyi hata performansı sergileyen kuvvetlendir-ve-aktar (amplify-and-forward (AF)) tipi röleli bir iletim sistemi önerilmektedir. Önerilen röleli sisteme ilişkin nihai hata olasılıgı performansı, Nakagami-m sönümlemeli kanal modeli için Monte Carlo simülasyon teknigi kullanılarak incelenmiştir. Anahtar Kelimeler-Verici anten seçimi, dik uzay-zaman blok kodlama, iki-atlamalı haberleşme, AF röleli iletim, geribesleme hatalarıAbstract-This paper proposes a dual-hop amplify-andforward (AF) relay system which employs a modified transmit antenna selection (TAS)/orthogonal space-time block coding (OS-TBC) scheme in both signaling links (i.e., Source→Relay and Relay→Destination) that provides reduced feedback-rate and robust error performance in the presence of feedback errors (FEs) when compared to the conventional TAS/OSTBC (C-TAS/OSTBC). The error probability performance of the proposed dual-hop AF relay scheme in Nakagami fading channels has been examined via Monte Carlo simulations.

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Performance analysis of dual-hop fixed-gain AF relaying systems with OSTBC over Nakagami-m fading channels

Cited by 15 publications

References 29 publications

Performance of dual‐hop full‐duplex relay networks with orthogonal space‐time block coding in Nakagami‐mfading channels

Performance of dual‐hop full‐duplex relay networks with orthogonal space‐time block coding in Nakagami‐mfading channels

Conventional and modified TAS/OSTBC schemes in dual‐hop fixed‐gain amplify‐and‐forward relaying systems with imperfect feedback

Performance of dual-hop AF relay systems employing modified TAS/OSTBC scheme in both hops in the presence of feedback errors

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