NDLI: Instantaneous Relaying: Optimal Strategies and Interference Neutralization

Content Provider	IEEE Xplore Digital Library
Author	Ho, Z.K.M. Jorswieck, E.A.
Copyright Year	1991
Abstract	In a multi-user wireless network equipped with multiple relay nodes, some relays are more intelligent than other relay nodes. The intelligent relays are able to gather channel state information, perform linear processing and forward signals whereas the dumb relays are only able to serve as amplifiers. As the dumb relays are oblivious to the source and destination nodes, the wireless network can be modeled as a relay network with smart instantaneous relay only: the signals of the source-destination link arrive at the same time as the source-relay-destination link. Recently, instantaneous relaying is shown to improve the degrees-of-freedom of the network as compared to the classical cut-set bound. In this paper, we study an achievable rate region and its boundary of the instantaneous interference relay channel in the scenario of (a) uninformed non-cooperative source-destination nodes (source and destination nodes are not aware of the existence of the relay and are non-cooperative) and (b) informed and cooperative source-destination nodes. Further, we examine the performance of interference neutralization: a relay strategy which is able to cancel interference signals at each destination node in the air. We observe that interference neutralization, although promised to achieve desired degrees-of-freedom, may not be feasible if the relay has limited power. Simulation results show that the optimal relay strategies improve the achievable rate region and provide better user-fairness in both uninformed non-cooperative and informed cooperative scenarios.
Sponsorship	IEEE Signal Processing Society
Starting Page	6655
Ending Page	6668
Page Count	14
File Size	3586545
File Format	PDF
ISSN	1053587X
Volume Number	60
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-12-01
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 Interference Decoding Wireless networks Signal to noise ratio Encoding Optimization semi-definite relaxation Amplify-and-forward relay convex optimization full-duplex relay instantaneous relay interference neutralization interference relay channel non-potent relay Pareto boundary
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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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