A New Duplex without Loss of Data Rate and Utilizing Selection Diversity

Ju, Hyungsik; Lee, Sungeun; Kwak, Kyu Tae; Oh, Eunsung; Hong, Daesik

doi:10.1109/vetecs.2008.355

Cited by 24 publications

(35 citation statements)

References 8 publications

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“…After some mathematical manipulations similar to the case of T 2 , an approximate expression for T 3 is finally given as in (9).…”

Section: Appendix a Approximate Calculation For The Outage Probabilitmentioning

confidence: 99%

“…Reports in [6][7][8] have shown that, through the combined use of passive and active (analog and digital) cancellation techniques, the self interference can be reduced to strikingly low values. Indeed, [6] shows that an average cancellation of 74 dB leads to higher FD rates if compared with HD rates, by using active cancellation to attenuate the line-of-sight (LOS) component of the self interference [9]. In this sense, the last advances in full-duplex transmission have generated great expectations, mainly for the spectral efficiency advantages, not only in cooperative networks, but for bidirectional communications or backhauling and access links in emerging wireless communication technologies for 5G [10,11].…”

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confidence: 99%

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An Adaptive Transmission Scheme for Amplify-and-Forward Relaying Networks

Osorio

Olivo

Alves

et al. 2016

IEEE Trans. Commun.

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Abstract-In this work, an adaptive scheme for amplify-andforward relaying networks is proposed, which selects a certain transmission mode for each communication process. Depending on the instantaneous channel conditions, one of the following modes is selected: direct transmission with no cooperation, cooperative transmission with half-duplex relaying and maximalratio combining at the destination, or cooperative transmission with full-duplex relaying and maximal-ratio combining at the destination. A three-node network is considered, containing a singleantenna source, a two-antenna relay that is able to implement full-duplex communication, and a single-antenna destination. Energy normalization per block is assumed, so that in those modes using cooperation the system's transmission power is shared between source and relay. The performance analysis is provided in terms of outage probability and energy efficiency. We derive a tight approximate expression in closed form for the outage probability and an approximate expression in integral form for the mean energy consumption. The results show that our scheme outperforms all of transmission modes separately in terms of outage probability, while being more energy efficient than the cooperative transmission modes. Additionally, the asymptotic analysis proves that the proposed scheme achieves full diversity order equal to 2, thus outperforming those schemes with direct transmission or full-duplex cooperation only.Index Terms-Amplify-and-forward, direct link, half duplex, full duplex, adaptive transmission mode, outage probability, relaying networks, energy efficiency.

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“…After some mathematical manipulations similar to the case of T 2 , an approximate expression for T 3 is finally given as in (9).…”

Section: Appendix a Approximate Calculation For The Outage Probabilitmentioning

confidence: 99%

mentioning

confidence: 99%

An Adaptive Transmission Scheme for Amplify-and-Forward Relaying Networks

Osorio

Olivo

Alves

et al. 2016

IEEE Trans. Commun.

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“…This is meaningful because beamforming and full rank transmission capture the low and high SNR properties of those systems, respectively. By comparing the UB in (13) and the LB in (14), it is possible to evaluate sufficient conditions for a B-MIMO system to have greater achievable rate than a U-MIMO system more easily. Later in this section, those conditions are evaluated by comparing these bounds.…”

Section: B Sufficient Conditions Under Which the B-mimo System Outpementioning

confidence: 99%

“…On the other hand, a conventional MIMO system is called a uni-directional MIMO (U-MIMO) system because the spatial resources are used for uni-directional data transmission. The concept of a B-MIMO system has been used in research regarding duplexing systems [13] [14] and various relay systems [15]- [18]. In those studies, bi-directional use of the spatial resources is primarily investigated from the perspective of the achievable rate of those systems when the channels are in a spatially white environment.…”

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confidence: 99%

Bi-Directional Use of Spatial Resources and Effects of Spatial Correlation

Shang

Poor

et al. 2011

IEEE Trans. Wireless Commun.

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In multiple antenna systems, spatial fading correlation causes a significant degradation in performance. In this work, a method for reducing the sensitivity to spatial fading correlation through the bi-directional use of spatial resources is investigated. Firstly, the concept of bi-directional use of spatial resources is introduced and the fading characteristics of the proposed bi-directional multiple-input multiple-output (B-MIMO) system are investigated. The achievable rates of the B-MIMO system are then investigated and compared with those of conventional MIMO systems for beamforming and full rank transmission. Based on those results, conditions needed for the B-MIMO system to demonstrate a larger average achievable rate are evaluated. B-MIMO systems are found to efficiently reduce the sensitivity to spatial fading correlation, while supporting comparable achievable rates in spatially white environments.

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“…In theory, FD systems are capable of doubling the overall spectral efficiency when compared to the traditional Half-Duplex (HD) networks. Unfortunately, the performance of practical systems is severely deteriorated by the intrinsic Self-Interference (SI) and the extra CoChannel Interference (CCI) from other concurrent (sametype) transmitters [5].…”

Section: Introductionmentioning

confidence: 99%

Full-duplex communications in interference networks under composite fading channel

Lima

Nardelli

Alves

2014

2014 European Conference on Networks and Communications (EuCNC)

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In this paper, we investigate how highly dense deployments of small cells perform when full-duplex nodes communicate under composite fading channels. With regard to an arbitrary user of interest, we first identify the impact of the extra interference from co-channel users and how that compares to the intrinsic self-interference. The performance of full-duplex networks is compared to a traditional halfduplex benchmark scenario where the only source of downlink inference is originated by simultaneous transmissions of surrounding base stations. A mathematical framework based on stochastic geometry is used to carry out our investigations. Here, the system performance is assessed by considering various network configurations and distinct fading channel conditions, namely log-normal shadowing and Nakagamim fading. Using the aforesaid framework, we approximate the aggregate interference at the user of interest and then derive closed-form expressions for the corresponding signal to interference ratio and outage probability. Results show that users in full-duplex mode achieve higher rates even though they are subject to higher interference. It is also shown that the extent of these gains depends on the selfinterference cancellation value that can be achieved and how that compares to the inference from other users.

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A New Duplex without Loss of Data Rate and Utilizing Selection Diversity

Cited by 24 publications

References 8 publications

An Adaptive Transmission Scheme for Amplify-and-Forward Relaying Networks

An Adaptive Transmission Scheme for Amplify-and-Forward Relaying Networks

Bi-Directional Use of Spatial Resources and Effects of Spatial Correlation

Full-duplex communications in interference networks under composite fading channel

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