Optimal Source-Power Splitting in Non-Orthogonal Cooperative Relaying Communications

Jihyun SHIN; Dongwoo KIM

doi:10.1587/transcom.2015EBP3393

Optimal Source-Power Splitting in Non-Orthogonal Cooperative Relaying Communications

Jihyun SHIN, Dongwoo KIM

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This paper proposes an application of splitting source-node power for a two-phase cooperative relaying system where the transmit powers of the source and the relay node are individually constrained. In the proposed usage, the limited source power is divided into two parts that are used in the first and the second phase. Unlike conventional relaying methods, in the second phase the source retransmits its signal with the split power and, at the same time, the relay forwards the signal received at the first phase, which causes interference between the signals. In order to avoid the intervention, so-called a co-phasing weight for aligning the phases of the two signals is used at at the source before the second transmission. The forwarding operation at the relay however is exactly the same as the conventional techniques. Optimal power-splitting as well as the co-phasing weight is provided in this paper. With numerical investigation, the proposed power-splitting is shown to significantly improve the achievable throughput as well as reduce the outage probability compared with the conventional individual power allocation.

Publication: IEICE TRANSACTIONS on Communications Vol.E99-B No.1 pp.249-256

Publication Date: 2016/01/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1587/transcom.2015EBP3393

Type of Manuscript: PAPER

Category: Wireless Communication Technologies

Authors

Jihyun SHIN
Hanyang University
Dongwoo KIM
Hanyang University

Keyword

non-orthogonal cooperative relaying, power allocation, power-splitting, individual power constraint

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Jihyun SHIN, Dongwoo KIM, "Optimal Source-Power Splitting in Non-Orthogonal Cooperative Relaying Communications" in IEICE TRANSACTIONS on Communications, vol. E99-B, no. 1, pp. 249-256, January 2016, doi: 10.1587/transcom.2015EBP3393.
Abstract: This paper proposes an application of splitting source-node power for a two-phase cooperative relaying system where the transmit powers of the source and the relay node are individually constrained. In the proposed usage, the limited source power is divided into two parts that are used in the first and the second phase. Unlike conventional relaying methods, in the second phase the source retransmits its signal with the split power and, at the same time, the relay forwards the signal received at the first phase, which causes interference between the signals. In order to avoid the intervention, so-called a co-phasing weight for aligning the phases of the two signals is used at at the source before the second transmission. The forwarding operation at the relay however is exactly the same as the conventional techniques. Optimal power-splitting as well as the co-phasing weight is provided in this paper. With numerical investigation, the proposed power-splitting is shown to significantly improve the achievable throughput as well as reduce the outage probability compared with the conventional individual power allocation.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2015EBP3393/_p

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@ARTICLE{e99-b_1_249,
author={Jihyun SHIN, Dongwoo KIM, },
journal={IEICE TRANSACTIONS on Communications},
title={Optimal Source-Power Splitting in Non-Orthogonal Cooperative Relaying Communications},
year={2016},
volume={E99-B},
number={1},
pages={249-256},
abstract={This paper proposes an application of splitting source-node power for a two-phase cooperative relaying system where the transmit powers of the source and the relay node are individually constrained. In the proposed usage, the limited source power is divided into two parts that are used in the first and the second phase. Unlike conventional relaying methods, in the second phase the source retransmits its signal with the split power and, at the same time, the relay forwards the signal received at the first phase, which causes interference between the signals. In order to avoid the intervention, so-called a co-phasing weight for aligning the phases of the two signals is used at at the source before the second transmission. The forwarding operation at the relay however is exactly the same as the conventional techniques. Optimal power-splitting as well as the co-phasing weight is provided in this paper. With numerical investigation, the proposed power-splitting is shown to significantly improve the achievable throughput as well as reduce the outage probability compared with the conventional individual power allocation.},
keywords={},
doi={10.1587/transcom.2015EBP3393},
ISSN={1745-1345},
month={January},}

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TY - JOUR
TI - Optimal Source-Power Splitting in Non-Orthogonal Cooperative Relaying Communications
T2 - IEICE TRANSACTIONS on Communications
SP - 249
EP - 256
AU - Jihyun SHIN
AU - Dongwoo KIM
PY - 2016
DO - 10.1587/transcom.2015EBP3393
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E99-B
IS - 1
JA - IEICE TRANSACTIONS on Communications
Y1 - January 2016
AB - This paper proposes an application of splitting source-node power for a two-phase cooperative relaying system where the transmit powers of the source and the relay node are individually constrained. In the proposed usage, the limited source power is divided into two parts that are used in the first and the second phase. Unlike conventional relaying methods, in the second phase the source retransmits its signal with the split power and, at the same time, the relay forwards the signal received at the first phase, which causes interference between the signals. In order to avoid the intervention, so-called a co-phasing weight for aligning the phases of the two signals is used at at the source before the second transmission. The forwarding operation at the relay however is exactly the same as the conventional techniques. Optimal power-splitting as well as the co-phasing weight is provided in this paper. With numerical investigation, the proposed power-splitting is shown to significantly improve the achievable throughput as well as reduce the outage probability compared with the conventional individual power allocation.
ER -