NDLI: Information Rate and Relay Precoder Design for Amplify-and-Forward MIMO Relay Networks With Imperfect Channel State Information

Content Provider	IEEE Xplore Digital Library
Author	Ronghong Mo Yong Huat Chew Chau Yuen
Copyright Year	1967
Abstract	This paper investigates achievable information rate and relay precoder design of multiple-input-multiple-output (MIMO) amplify-and-forward (AF) relay networks under imperfect channel state information (CSI) including channel estimation (CE) errors and feedback/feedforward (FB/FF) delay errors, without considering the direct link from source to destination. For the first time, we derive the achievable information rate of AF MIMO relay networks under imperfect CSI for two scenarios: In the first scenario, both the source-relay (S-R) and relay-destination (R-D) links are estimated at the destination, whereas in the second scenario, the S-R link is estimated at the relay, and the R-D link is estimated at the destination. We then design a relay precoder that maximizes the approximate achievable information rate, given the average relay power constraint. Numerical results show that Scenario I achieves better average information rate than Scenario II. It is also observed that the accuracy of the CE of the S-R link is more important than that of the R-D link. Finally, the proposed relay precoder can achieve an average achievable information rate higher than the conventional fixed gain relaying scheme, and higher than a relay precoder design treating the estimated CSI as perfect CSI at higher CE and FB/FF delay errors.
Sponsorship	IEEE Vehicular Technology Society
Starting Page	3958
Ending Page	3968
Page Count	11
File Size	1478523
File Format	PDF
ISSN	00189545
Volume Number	61
Issue Number	9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Information rates MIMO Channel estimation Delay Vectors Covariance matrix information rate Amplify-and-forward (AF) multiple-input–multiple-output (MIMO) relay channel estimation (CE) errors feedback/feedforward (FB/FF) errors imperfect channel state information (CSI)
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Automotive Engineering Computer Networks and Communications Electrical and Electronic Engineering Aerospace Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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