[논문]Optimal Duplex Selection for Decode and Forward Relay Systems with Power Allocation

Kwon, Taehoon; Lim, Sungmook

doi:10.3837/tiis.2016.12.012

Optimal Duplex Selection for Decode and Forward Relay Systems with Power Allocation 원문보기

KSII Transactions on internet and information systems : TIIS, v.10 no.12, 2016년, pp.5347 - 5360

Kwon, Taehoon (Korea Institute of Science and Technology Information (KISTI)) , Lim, Sungmook (Department of Electronic Engineering, Korea National University of Transportation)

Abstract ▼ AI-Helper

In decode and forward relay systems, choosing the duplex mode is an important factor to the performance. To satisfy the performance requirement, self-interference must be mitigated for the full-duplex relay (FDR), and the resource efficiency must be increased for the half-duplex ratio (HDR). Therefore, if a wise scheme to consider these two factors exists, decode and forward relay systems are used more effectively. This study proposes a new duplex selection scheme for decode and forward relay systems. The proposed duplex selection scheme chooses the better duplex mode according to the channel statistical conditions with optimal power allocation. The simulation results show that the proposed duplex scheme with optimal power allocation has lower outage probability than the FDR and the HDR.

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가설 설정

I. Each channel models as a complex Gaussian random variable to have Rayleigh fading gains.
Under the same assumption, this study models the self-interfering link as a Rayleigh fading channel under the assumptions that the LOS component is reduced efficiently by the antenna isolation and that a major effect results from the scattering component [2]. If interference cancelation (IC) is used for more interference mitigations, the residual interfering link is also modeled as a Rayleigh fading channel because the residual interference comes from the channel estimation error of the self-interfering link [2].

제안 방법

This study proposes the duplex selection scheme according to environments, which include the optimal power allocation to minimize the outage probability of the FDR. In the proposed duplex selection scheme, the suitable duplex mode is selected based on the outage probability analysis of the HDR, the FDR, and the direct link. In addition, the practical method to obtain the required parameters is discussed.
This study proposes a new optimal duplex selection scheme that minimizes the outage probability. The proposed method selects the duplex mode between half-duplex and full-duplex according to the channel statistical conditions. In the full-duplex mode, the optimal power is allocated to minimize the outage probability to balance between the robustness to noise and the effect of interference.
The outage probability is one of the important indicators to show transmission reliability. This study proposes a new duplex scheme in which the best duplex mode is chosen to minimize the outage probability with optimal power allocation.
This study proposes a new optimal duplex selection scheme that minimizes the outage probability. The proposed method selects the duplex mode between half-duplex and full-duplex according to the channel statistical conditions.
This study proposes the duplex selection scheme according to environments, which include the optimal power allocation to minimize the outage probability of the FDR. In the proposed duplex selection scheme, the suitable duplex mode is selected based on the outage probability analysis of the HDR, the FDR, and the direct link.

성능/효과

5, it is set to 20 dB. As this study expected, the outage probability of the PDS is lower than that of the FDR and the HDR. In particular, if the interference can be mitigated by the optimal power allocation, such as the 0 dB or 10 dB interference case, the outage probability of PDS is lower than that of the FDR and the HDR.
Throughout the simulation, it can be verified that the proposed duplex selection scheme shows a lower outage probability compared to other schemes, such as HDR, FDR and direct link.

참고문헌 (19)

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상세보기
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상세보기
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상세보기
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원문보기 상세보기
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상세보기
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상세보기
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상세보기
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상세보기
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DOI : 10.3837/tiis.2016.12.012
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