NDLI: A novel relay-based interference alignment strategy for multi-user networks

Content Provider	IEEE Xplore Digital Library
Author	Yue Tian Beach, M. Nix, A.
Copyright Year	2015
Description	Author affiliation: Center for Commun. Res., Univ. of Bristol, Bristol, UK (Yue Tian; Beach, M.; Nix, A.)
Abstract	Interference alignment (IA) is a transmission strategy that use channel state information (CSI) to improve the capacity of multiuser communication systems. However, the performance of IA is always limited by the accuracy of the CSI. In particular, this is a problem in time-varying channels, as the CSI at transmitter (CSIT) may become outdated when the channel is changing quickly. In this study, we propose a novel cooperative relay-based interference alignment (RIA) scheme, which aims to increase the number of Degrees of Freedom (DoF) for the multiuser networks, even when the required source-to-destination CSIT is completely outdated. With the RIA scheme, the DoF region is firstly derived under an ideal CSIT case. Then, the RIA scheme is respectively presented in non-ideal CSIT cases. Furthermore, the achievable DoF regions by RIA in these non-ideal cases are derived. In addition, the trade-off between relay-based and non-relay based IA schemes are analysed.
Starting Page	630
Ending Page	634
File Size	329992
Page Count	5
File Format	PDF
e-ISBN	9781479919314
DOI	10.1109/SPAWC.2015.7227114
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-06-28
Publisher Place	Sweden
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Interference Wireless communication Transmitters Uplink Conferences Signal processing
Content Type	Text
Resource Type	Article

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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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