Show simple item record

AuthorLi, Jing
AuthorGe, Jianhua
AuthorZhang, Chensi
AuthorShi, Jingjing
AuthorRui, Yun
AuthorGuizani, Mohsen
Available date2022-11-10T09:47:30Z
Publication Date2013
Publication NameIEEE Transactions on Vehicular Technology
ResourceScopus
Resource2-s2.0-84877869616
URIhttp://dx.doi.org/10.1109/TVT.2012.2235868
URIhttp://hdl.handle.net/10576/36215
AbstractChannel estimation error results in severe performance deterioration in wireless networks. In this paper, we study the impact of imperfect channel estimation (ICE) on the outage performance of bidirectional relaying where the two sources have asymmetric traffic requirements (ATRs). In particular, we focus on the amplify-and-forward (AF) relay-assisted multiple-access broadcast (MABC) protocol, i.e., MABC-AF, which has received much attention due to its high spectrum efficiency and low complexity. In the single-relay scenario, we derive exact and generalized closed-form expressions for system outage probability, which indicate that the system outage is determined by the unidirectional outage in the case of highly asymmetric traffic patterns. For more insights into our approach, the closed-form asymptotic expressions are also evaluated, manifesting the interesting error floor (EF) phenomenon due to ICE. Using these analytical results, we further develop a robust and practical optimum power-allocation (OPA) algorithm that minimizes the system outage probability under aggregate and individual node power constraints. In the multirelay scenario, by taking into account the traffic knowledge, a novel relay selection criterion is proposed for asymmetric MABC-AF, followed by its impact on the system outage probability in the presence of ICE. Numerical results validate the accuracy of our analytical results and highlight the effect of the proposed OPA algorithm under various traffic requirements and channel estimation errors. Furthermore, the results also show that the proposed relay selection criterion is superior to the classical max-min criterion with ATRs, and the performance improvement becomes remarkable as channel estimation error increases. 2012 IEEE.
Languageen
PublisherInstitute of Electrical and Electronics Engineers Inc.
SubjectAnalog network coding
asymmetric traffic
channel estimation error
outage probability
power allocation
relay selection
TitleImpact of channel estimation error on bidirectional MABC-AF relaying with asymmetric traffic requirements
TypeArticle
Pagination1755-1769
Issue Number4
Volume Number62
dc.accessType Abstract Only


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record