NDLI: Generalized degrees of freedom of the symmetric gaussian interference channel with partial unidirectional transmitter cooperation

Content Provider	IEEE Xplore Digital Library
Author	Bagheri, H. Motahari, A.S. Khandani, A.K.
Copyright Year	2009
Description	Author affiliation: Coding and Signal Transmission Laboratory, Electrical and Computer Engineering Department, University of Waterloo, ON, Canada (Bagheri, H.; Motahari, A.S.; Khandani, A.K.)
Abstract	We consider a two-user symmetric Gaussian Interference Channel (IC), in which one encoder is connected to the other by a unidirectional orthogonal cooperative link with specific capacity. In this setup, we employ a simplified Han-Kobayashi scheme used in [1], along with cooperative communication. We characterize the generalized degrees of freedom [1] of the channel for interference-limited regimes by comparing the achievable sum-rate with some existing upper bounds and also with a new upper bound, introduced in this paper. In particular, we express the number of degrees of freedom available for communication as a function of the interference-to-noise ratio and the multiplexing gain of the cooperative link. In addition, we give the sum-capacity of the channel for the strong interference regime when the capacity of the cooperative link is large enough in terms of the channel parameters. Finally, we show that for noise-limited regimes, treating interference as noise and not using the cooperative link, offer a sum-rate that is at most one bit less than the sum-capacity of the channel.
Starting Page	307
Ending Page	312
File Size	190523
Page Count	6
File Format	PDF
ISBN	9781424427338
DOI	10.1109/CISS.2009.5054736
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-03-18
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Degradation Upper bound Councils Radio transmitters Laboratories sum-capacity generalized degrees of freedom partial cooperation Interference channels Decoding Cognitive radio Interference channel
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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