Improper Gaussian Signaling Scheme for the Z-Interference Channel

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Improper Gaussian Signaling Scheme for the Z-Interference Channel
Title:
Improper Gaussian Signaling Scheme for the Z-Interference Channel
Journal Title:
IEEE Transactions on Wireless Communications (Vol. 14, No. 7)
Keywords:
Publication Date:
20 March 2015
Citation:
E. Kurniawan and S. Sun, "Improper Gaussian Signaling Scheme for the Z-Interference Channel," in IEEE Transactions on Wireless Communications, vol. 14, no. 7, pp. 3912-3923, July 2015. doi: 10.1109/TWC.2015.2414913
Abstract:
This paper studies improper Gaussian signaling in the Z-Interference-Channel (ZIC) for the case when the interference is treated as noise. The extra degree of freedom from improper signaling provides better interference management, allowing to balance the trade-off between maximizing the direct link throughput and controlling the effect of interference, hence giving better achievable rate than the proper signaling counterpart. In this work, a closed form solution to the sum-rate maximizing real-composite transmit covariance matrix is derived for the ZIC. The structure of the real-composite covariance matrix reveals some interesting insights, such as the optimality of binary power control, the channel condition when improper signaling is strictly better than the proper signaling strategy, as well as the relationship between the choice of the real-composite transmit covariance matrix and the system parameters. The connection between the results obtained in this work and those available in the literature are also pointed out.
License type:
PublisherCopyrights
Funding Info:
Description:
(c) 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
ISSN:
1536-1276
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