On the diversity order of a general cooperative relaying communication system

Yue, DW; Lau, FCM; Wang, Q

On the diversity order of a general cooperative relaying communication system

Yue, DW Lau, FCM Wang, Q

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Publication Type:: Journal Article
Citation:: Wireless Personal Communications, 2014, 77 (1), pp. 605 - 631
Issue Date:: 2014-01-01

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Field	Value	Language
dc.contributor.author	Yue, DW	en_US
dc.contributor.author	Lau, FCM	en_US
dc.contributor.author	Wang, Q https://orcid.org/0000-0002-2326-4549	en_US
dc.date.issued	2014-01-01	en_US
dc.identifier.citation	Wireless Personal Communications, 2014, 77 (1), pp. 605 - 631	en_US
dc.identifier.issn	0929-6212	en_US
dc.identifier.uri	http://hdl.handle.net/10453/116116
dc.description.abstract	Cooperative communication technology exploiting distributed spatial diversity is a promising solution for the future high data-rate cellular and ad-hoc wireless communications. To characterize the performance of a cooperative network, the cooperative diversity is commonly used. In this paper, we revisit the concept of diversity and look into the essence of cooperative diversity. We analyze the diversity performance of a general cooperative relaying system with multiple branches. Moreover, each branch consists of one or more hops. Unlike in other analyses, the assumptions that each node being only equipped with a single antenna and that all channel characteristics belonging to the same family are NOT required in our study. Using the decode-and-forward (DF) relaying protocol as an illustration, we provide analytical results on the diversity gain and the coding gain. The results also encompass most of the existing results as special cases. We further show the relationship between the diversity order of a branch and those of the constituent links; and the relationship between the diversity order of the network and those of the constituent branches. In particular, we show that for the uncoded DF protocol, the full diversity order can be achieved by using simple hard-decision detection at the destination. The requirement is to set appropriate signal-to-noise-ratio (SNR) thresholds for the multi-hop branches. To improve the bandwidth efficiency, we also randomly select one branch, among those branches satisfying the SNR-threshold requirement, for the transmission. We show that such a scheme accomplishes the full diversity order and produces a good error performance. © 2013 Springer Science+Business Media New York.	en_US
dc.relation.ispartof	Wireless Personal Communications	en_US
dc.relation.isbasedon	10.1007/s11277-013-1525-x	en_US
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Networking & Telecommunications	en_US
dc.title	On the diversity order of a general cooperative relaying communication system	en_US
dc.type	Journal Article
utslib.citation.volume	1	en_US
utslib.citation.volume	77	en_US
utslib.for	0805 Distributed Computing	en_US
utslib.for	0906 Electrical and Electronic Engineering	en_US
utslib.for	1005 Communications Technologies	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
pubs.issue	1	en_US
pubs.publication-status	Published	en_US
pubs.volume	77	en_US

Abstract:

Cooperative communication technology exploiting distributed spatial diversity is a promising solution for the future high data-rate cellular and ad-hoc wireless communications. To characterize the performance of a cooperative network, the cooperative diversity is commonly used. In this paper, we revisit the concept of diversity and look into the essence of cooperative diversity. We analyze the diversity performance of a general cooperative relaying system with multiple branches. Moreover, each branch consists of one or more hops. Unlike in other analyses, the assumptions that each node being only equipped with a single antenna and that all channel characteristics belonging to the same family are NOT required in our study. Using the decode-and-forward (DF) relaying protocol as an illustration, we provide analytical results on the diversity gain and the coding gain. The results also encompass most of the existing results as special cases. We further show the relationship between the diversity order of a branch and those of the constituent links; and the relationship between the diversity order of the network and those of the constituent branches. In particular, we show that for the uncoded DF protocol, the full diversity order can be achieved by using simple hard-decision detection at the destination. The requirement is to set appropriate signal-to-noise-ratio (SNR) thresholds for the multi-hop branches. To improve the bandwidth efficiency, we also randomly select one branch, among those branches satisfying the SNR-threshold requirement, for the transmission. We show that such a scheme accomplishes the full diversity order and produces a good error performance. © 2013 Springer Science+Business Media New York.

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http://hdl.handle.net/10453/116116