A New Efficient Low-Complexity Scheme for Multi-Source Multi-Relay Cooperative Networks

Ding, Haiyang; Ge, Jianhua; Costa, Daniel Benevides da; Jiang, Zijian

doi:10.1109/tvt.2010.2100416

Cited by 73 publications

(101 citation statements)

References 14 publications

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“…In [11] and [12], the relays serve one data block immediately after the data block's direct transmission has been finished. In this TRA, the relays are dedicated to assist one data block in each relay time slot and brings no benefits for the other data blocks.…”

Section: B the Proposed Us-lcrpmentioning

confidence: 99%

“…In [12], the CSI of only the N direct links and of the 2M relaying links has to be estimated for selecting the "proper" user and the "proper" relay. In contrast, the US-LCRP requires to estimate the CSI of only the N direct links in the broadcast phase while in the relay phase it does not need to estimate any CSI.…”

Section: N0mentioning

confidence: 99%

“…In each relay TS of the US-LCRP, the destination D only has to evaluate the received SNR and update the users' quality records. It should be noted that in each relay TS of the scheme proposed in [12], D also has to estimate the received SNR of the relayed signal as in the proposed US-LCRP scheme, because it also has to combine the original signal and the relayed signal.…”

Section: N0mentioning

confidence: 99%

“…As a result, the calculation and updating of each data block's quality do not incur other overhead when compared with the scheme of [12].…”

Section: N0mentioning

confidence: 99%

“…2 that the US-LCRP occupies L + M TSs whereas both schemes of [11] and [12] occupy 2L TSs. It implies that if L is set a larger value than M , the US-LCRP has the potential to achieve higher spectral efficiency than the schemes of [11], [12], because the US-LCRP requires less time resources. This conclusion will be demonstrated by both the analytical results of Section III and the simulation results of Section IV, as detailed subsequently.…”

Section: N0mentioning

confidence: 99%

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A Low Complexity Approach of Combining Cooperative Diversity and Multiuser Diversity in Multiuser Cooperative Networks

Zhang

Yang

2013

IEEE Trans. Signal Process.

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In this paper, we investigate the scheduling scheme to combine cooperative diversity (CD) and multiuser diversity (MUD) in multiuser cooperative networks under the time resource allocation (TRA) framework in which the whole transmission is divided into two phases: the broadcast phase and the relay phase. The broadcast phase is for direct transmission whereas the relay phase is for relay transmission. Based on this TRA framework, a user selection based low complexity relay protocol (US-LCRP) is proposed to combine CD and MUD. In each time slot (TS) of the broadcast phase, a "best" user is selected for transmission in order to obtain MUD. In the relay phase, the relays forward the messages of some specific users in a fixed order and then invoke the limited feedback information to achieve CD. We demonstrate that the diversity-multiplexing tradeoff (DMT) of the US-LCRP is superior to that of the existing schemes, where more TSs are allocated for direct transmission in order to jointly exploit CD and MUD. Our analytical and numerical results show that the US-LCRP constitutes a more efficient resource utilization approach than the existing schemes.

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Section: B the Proposed Us-lcrpmentioning

confidence: 99%

Section: N0mentioning

confidence: 99%

Section: N0mentioning

confidence: 99%

“…As a result, the calculation and updating of each data block's quality do not incur other overhead when compared with the scheme of [12].…”

Section: N0mentioning

confidence: 99%

Section: N0mentioning

confidence: 99%