Analyses of Achievable Gains in Half Duplex MIMO Relaying Schemes Using Multiple Relay Nodes

Hui SHI; Tetsushi ABE; Takahiro ASAI; Hitoshi YOSHINO

doi:10.1093/ietcom/e90-b.9.2541

Analyses of Achievable Gains in Half Duplex MIMO Relaying Schemes Using Multiple Relay Nodes

Hui SHI, Tetsushi ABE, Takahiro ASAI, Hitoshi YOSHINO

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In multiple-input multiple-output (MIMO) wireless relay networks, simultaneously using multiple relay nodes can improve the capacity of source-to-destination communications. Recent information theories have shown that passing the same message across multiple relay nodes can improve the capacity of source-to-destination communications. We have previously proposed three relay schemes that use jointly QR decomposition and the phase control matrix; computer simulations have confirmed the superiority of these schemes over conventional ones such as amplify-and-forward and zero-forcing schemes. In this paper, we analyze the capacity and achievable gains (distributed array gain, intra-node array gain and spatial multiplexing gain) of the previously proposed relay schemes (QR-P-QR, QR-P-ZF, and ZF-P-QR) and thus provide an insight into what contributes to their superiority over conventional schemes. The analyses show that the location of the relay nodes used has a significant impact on capacity. On the basis of this observation, we further propose a method that enables each relay node to individually select its relay scheme according to its channel conditions so as to maximize the capacity. A computer simulation confirms the capacity improvement achieved by the proposed selection method.

Publication: IEICE TRANSACTIONS on Communications Vol.E90-B No.9 pp.2541-2551

Publication Date: 2007/09/01

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Online ISSN: 1745-1345

DOI: 10.1093/ietcom/e90-b.9.2541

Type of Manuscript: PAPER

Category: Wireless Communication Technologies

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Hui SHI, Tetsushi ABE, Takahiro ASAI, Hitoshi YOSHINO, "Analyses of Achievable Gains in Half Duplex MIMO Relaying Schemes Using Multiple Relay Nodes" in IEICE TRANSACTIONS on Communications, vol. E90-B, no. 9, pp. 2541-2551, September 2007, doi: 10.1093/ietcom/e90-b.9.2541.
Abstract: In multiple-input multiple-output (MIMO) wireless relay networks, simultaneously using multiple relay nodes can improve the capacity of source-to-destination communications. Recent information theories have shown that passing the same message across multiple relay nodes can improve the capacity of source-to-destination communications. We have previously proposed three relay schemes that use jointly QR decomposition and the phase control matrix; computer simulations have confirmed the superiority of these schemes over conventional ones such as amplify-and-forward and zero-forcing schemes. In this paper, we analyze the capacity and achievable gains (distributed array gain, intra-node array gain and spatial multiplexing gain) of the previously proposed relay schemes (QR-P-QR, QR-P-ZF, and ZF-P-QR) and thus provide an insight into what contributes to their superiority over conventional schemes. The analyses show that the location of the relay nodes used has a significant impact on capacity. On the basis of this observation, we further propose a method that enables each relay node to individually select its relay scheme according to its channel conditions so as to maximize the capacity. A computer simulation confirms the capacity improvement achieved by the proposed selection method.
URL: https://globals.ieice.org/en_transactions/communications/10.1093/ietcom/e90-b.9.2541/_p

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@ARTICLE{e90-b_9_2541,
author={Hui SHI, Tetsushi ABE, Takahiro ASAI, Hitoshi YOSHINO, },
journal={IEICE TRANSACTIONS on Communications},
title={Analyses of Achievable Gains in Half Duplex MIMO Relaying Schemes Using Multiple Relay Nodes},
year={2007},
volume={E90-B},
number={9},
pages={2541-2551},
abstract={In multiple-input multiple-output (MIMO) wireless relay networks, simultaneously using multiple relay nodes can improve the capacity of source-to-destination communications. Recent information theories have shown that passing the same message across multiple relay nodes can improve the capacity of source-to-destination communications. We have previously proposed three relay schemes that use jointly QR decomposition and the phase control matrix; computer simulations have confirmed the superiority of these schemes over conventional ones such as amplify-and-forward and zero-forcing schemes. In this paper, we analyze the capacity and achievable gains (distributed array gain, intra-node array gain and spatial multiplexing gain) of the previously proposed relay schemes (QR-P-QR, QR-P-ZF, and ZF-P-QR) and thus provide an insight into what contributes to their superiority over conventional schemes. The analyses show that the location of the relay nodes used has a significant impact on capacity. On the basis of this observation, we further propose a method that enables each relay node to individually select its relay scheme according to its channel conditions so as to maximize the capacity. A computer simulation confirms the capacity improvement achieved by the proposed selection method.},
keywords={},
doi={10.1093/ietcom/e90-b.9.2541},
ISSN={1745-1345},
month={September},}

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TY - JOUR
TI - Analyses of Achievable Gains in Half Duplex MIMO Relaying Schemes Using Multiple Relay Nodes
T2 - IEICE TRANSACTIONS on Communications
SP - 2541
EP - 2551
AU - Hui SHI
AU - Tetsushi ABE
AU - Takahiro ASAI
AU - Hitoshi YOSHINO
PY - 2007
DO - 10.1093/ietcom/e90-b.9.2541
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E90-B
IS - 9
JA - IEICE TRANSACTIONS on Communications
Y1 - September 2007
AB - In multiple-input multiple-output (MIMO) wireless relay networks, simultaneously using multiple relay nodes can improve the capacity of source-to-destination communications. Recent information theories have shown that passing the same message across multiple relay nodes can improve the capacity of source-to-destination communications. We have previously proposed three relay schemes that use jointly QR decomposition and the phase control matrix; computer simulations have confirmed the superiority of these schemes over conventional ones such as amplify-and-forward and zero-forcing schemes. In this paper, we analyze the capacity and achievable gains (distributed array gain, intra-node array gain and spatial multiplexing gain) of the previously proposed relay schemes (QR-P-QR, QR-P-ZF, and ZF-P-QR) and thus provide an insight into what contributes to their superiority over conventional schemes. The analyses show that the location of the relay nodes used has a significant impact on capacity. On the basis of this observation, we further propose a method that enables each relay node to individually select its relay scheme according to its channel conditions so as to maximize the capacity. A computer simulation confirms the capacity improvement achieved by the proposed selection method.
ER -