A Novel Cooperative Relaying Network Scheme with Inter-Relay Data Exchange

Salma Ait FARES; Fumiyuki ADACHI; Eisuke KUDOH

doi:10.1587/transcom.E92.B.1786

A Novel Cooperative Relaying Network Scheme with Inter-Relay Data Exchange

Salma Ait FARES, Fumiyuki ADACHI, Eisuke KUDOH

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In this paper, we propose a novel scheme of cooperative relaying network based on data exchange between relays before forwarding their received data to destination. This inter-relay data exchange step is done during an additional middle-slot in order to enhance the transmit signals from relays to the destination under low transmit power condition. To reduce the propagation errors between relays as well as the required transmit power during this data exchange, only the relay possessing the highest SNR is engaged into exchanging data by forwarding its received signal to the other relays. As for the remaining non-selected relays, i.e. with low SNR, the transmitted signal is estimated by using both signals received separately at different time slots (i.e., 1st and 2nd slot) from source and the 'best' selected relay, respectively, emulating virtual antenna array where appropriate weights for the antenna array are developed. In addition, we investigate distributed transmit beamforming and maximum ratio combining at the relays and the destination, respectively, to combine coherently the received signals. At the relay optimal location and for low SNR condition, the proposed method has significant better outage behavior and average throughput than conventional methods using one or two time slots for transmission.

Publication: IEICE TRANSACTIONS on Communications Vol.E92-B No.5 pp.1786-1795

Publication Date: 2009/05/01

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Online ISSN: 1745-1345

DOI: 10.1587/transcom.E92.B.1786

Type of Manuscript: Special Section PAPER (Special Section on Radio Access Techniques for 3G Evolution)

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Salma Ait FARES, Fumiyuki ADACHI, Eisuke KUDOH, "A Novel Cooperative Relaying Network Scheme with Inter-Relay Data Exchange" in IEICE TRANSACTIONS on Communications, vol. E92-B, no. 5, pp. 1786-1795, May 2009, doi: 10.1587/transcom.E92.B.1786.
Abstract: In this paper, we propose a novel scheme of cooperative relaying network based on data exchange between relays before forwarding their received data to destination. This inter-relay data exchange step is done during an additional middle-slot in order to enhance the transmit signals from relays to the destination under low transmit power condition. To reduce the propagation errors between relays as well as the required transmit power during this data exchange, only the relay possessing the highest SNR is engaged into exchanging data by forwarding its received signal to the other relays. As for the remaining non-selected relays, i.e. with low SNR, the transmitted signal is estimated by using both signals received separately at different time slots (i.e., 1st and 2nd slot) from source and the 'best' selected relay, respectively, emulating virtual antenna array where appropriate weights for the antenna array are developed. In addition, we investigate distributed transmit beamforming and maximum ratio combining at the relays and the destination, respectively, to combine coherently the received signals. At the relay optimal location and for low SNR condition, the proposed method has significant better outage behavior and average throughput than conventional methods using one or two time slots for transmission.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E92.B.1786/_p

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@ARTICLE{e92-b_5_1786,
author={Salma Ait FARES, Fumiyuki ADACHI, Eisuke KUDOH, },
journal={IEICE TRANSACTIONS on Communications},
title={A Novel Cooperative Relaying Network Scheme with Inter-Relay Data Exchange},
year={2009},
volume={E92-B},
number={5},
pages={1786-1795},
abstract={In this paper, we propose a novel scheme of cooperative relaying network based on data exchange between relays before forwarding their received data to destination. This inter-relay data exchange step is done during an additional middle-slot in order to enhance the transmit signals from relays to the destination under low transmit power condition. To reduce the propagation errors between relays as well as the required transmit power during this data exchange, only the relay possessing the highest SNR is engaged into exchanging data by forwarding its received signal to the other relays. As for the remaining non-selected relays, i.e. with low SNR, the transmitted signal is estimated by using both signals received separately at different time slots (i.e., 1st and 2nd slot) from source and the 'best' selected relay, respectively, emulating virtual antenna array where appropriate weights for the antenna array are developed. In addition, we investigate distributed transmit beamforming and maximum ratio combining at the relays and the destination, respectively, to combine coherently the received signals. At the relay optimal location and for low SNR condition, the proposed method has significant better outage behavior and average throughput than conventional methods using one or two time slots for transmission.},
keywords={},
doi={10.1587/transcom.E92.B.1786},
ISSN={1745-1345},
month={May},}

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TY - JOUR
TI - A Novel Cooperative Relaying Network Scheme with Inter-Relay Data Exchange
T2 - IEICE TRANSACTIONS on Communications
SP - 1786
EP - 1795
AU - Salma Ait FARES
AU - Fumiyuki ADACHI
AU - Eisuke KUDOH
PY - 2009
DO - 10.1587/transcom.E92.B.1786
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E92-B
IS - 5
JA - IEICE TRANSACTIONS on Communications
Y1 - May 2009
AB - In this paper, we propose a novel scheme of cooperative relaying network based on data exchange between relays before forwarding their received data to destination. This inter-relay data exchange step is done during an additional middle-slot in order to enhance the transmit signals from relays to the destination under low transmit power condition. To reduce the propagation errors between relays as well as the required transmit power during this data exchange, only the relay possessing the highest SNR is engaged into exchanging data by forwarding its received signal to the other relays. As for the remaining non-selected relays, i.e. with low SNR, the transmitted signal is estimated by using both signals received separately at different time slots (i.e., 1st and 2nd slot) from source and the 'best' selected relay, respectively, emulating virtual antenna array where appropriate weights for the antenna array are developed. In addition, we investigate distributed transmit beamforming and maximum ratio combining at the relays and the destination, respectively, to combine coherently the received signals. At the relay optimal location and for low SNR condition, the proposed method has significant better outage behavior and average throughput than conventional methods using one or two time slots for transmission.
ER -