Delay-Amplify-and-Forward Beamforming for Single-Carrier Relay Networks with Frequency Selective Channels

Hiroki TAKAHASHI; Teruyuki MIYAJIMA

doi:10.1587/transcom.2016EBP3391

Delay-Amplify-and-Forward Beamforming for Single-Carrier Relay Networks with Frequency Selective Channels

Hiroki TAKAHASHI, Teruyuki MIYAJIMA

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In this paper, we propose a relaying strategy for single-carrier relay networks with frequency selective channels, where each relay node delays its received signal before amplify-and-forward processing it. We propose a computationally efficient delay design method which reduces the number of delay candidates. To further reduce computational complexity, we develop a simplified delay design method which reduces the number of weight computations. Also, we extend the design method to the case where only partial channel state information of relay-to-destination channels is available. Simulation results show that the proposed relaying strategy outperforms a conventional amplify-and-forward relaying strategy and achieves the performance close to that of a more complex filter-and-forward relaying strategy. It is also shown that the proposed delay design method achieves near-optimum performance.

Publication: IEICE TRANSACTIONS on Communications Vol.E100-B No.11 pp.2079-2086

Publication Date: 2017/11/01

Publicized: 2017/05/19

Online ISSN: 1745-1345

DOI: 10.1587/transcom.2016EBP3391

Type of Manuscript: PAPER

Category: Wireless Communication Technologies

Authors

Hiroki TAKAHASHI
Ibaraki University
Teruyuki MIYAJIMA
Ibaraki University

Keyword

amplify-and-forward, distributed beamforming, relay networks, inter-symbol interference, equalization

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Hiroki TAKAHASHI, Teruyuki MIYAJIMA, "Delay-Amplify-and-Forward Beamforming for Single-Carrier Relay Networks with Frequency Selective Channels" in IEICE TRANSACTIONS on Communications, vol. E100-B, no. 11, pp. 2079-2086, November 2017, doi: 10.1587/transcom.2016EBP3391.
Abstract: In this paper, we propose a relaying strategy for single-carrier relay networks with frequency selective channels, where each relay node delays its received signal before amplify-and-forward processing it. We propose a computationally efficient delay design method which reduces the number of delay candidates. To further reduce computational complexity, we develop a simplified delay design method which reduces the number of weight computations. Also, we extend the design method to the case where only partial channel state information of relay-to-destination channels is available. Simulation results show that the proposed relaying strategy outperforms a conventional amplify-and-forward relaying strategy and achieves the performance close to that of a more complex filter-and-forward relaying strategy. It is also shown that the proposed delay design method achieves near-optimum performance.
URL: https://globals.ieice.org/en_transactions/communications/10.1587/transcom.2016EBP3391/_p

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@ARTICLE{e100-b_11_2079,
author={Hiroki TAKAHASHI, Teruyuki MIYAJIMA, },
journal={IEICE TRANSACTIONS on Communications},
title={Delay-Amplify-and-Forward Beamforming for Single-Carrier Relay Networks with Frequency Selective Channels},
year={2017},
volume={E100-B},
number={11},
pages={2079-2086},
abstract={In this paper, we propose a relaying strategy for single-carrier relay networks with frequency selective channels, where each relay node delays its received signal before amplify-and-forward processing it. We propose a computationally efficient delay design method which reduces the number of delay candidates. To further reduce computational complexity, we develop a simplified delay design method which reduces the number of weight computations. Also, we extend the design method to the case where only partial channel state information of relay-to-destination channels is available. Simulation results show that the proposed relaying strategy outperforms a conventional amplify-and-forward relaying strategy and achieves the performance close to that of a more complex filter-and-forward relaying strategy. It is also shown that the proposed delay design method achieves near-optimum performance.},
keywords={},
doi={10.1587/transcom.2016EBP3391},
ISSN={1745-1345},
month={November},}

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TY - JOUR
TI - Delay-Amplify-and-Forward Beamforming for Single-Carrier Relay Networks with Frequency Selective Channels
T2 - IEICE TRANSACTIONS on Communications
SP - 2079
EP - 2086
AU - Hiroki TAKAHASHI
AU - Teruyuki MIYAJIMA
PY - 2017
DO - 10.1587/transcom.2016EBP3391
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E100-B
IS - 11
JA - IEICE TRANSACTIONS on Communications
Y1 - November 2017
AB - In this paper, we propose a relaying strategy for single-carrier relay networks with frequency selective channels, where each relay node delays its received signal before amplify-and-forward processing it. We propose a computationally efficient delay design method which reduces the number of delay candidates. To further reduce computational complexity, we develop a simplified delay design method which reduces the number of weight computations. Also, we extend the design method to the case where only partial channel state information of relay-to-destination channels is available. Simulation results show that the proposed relaying strategy outperforms a conventional amplify-and-forward relaying strategy and achieves the performance close to that of a more complex filter-and-forward relaying strategy. It is also shown that the proposed delay design method achieves near-optimum performance.
ER -