Capacity of the Deterministic Z-Interference Channel with Unidirectional Transmitter Cooperation and Secrecy Constraints

Mohapatra, Parthajit and Murthy, Chandra R (2015) Capacity of the Deterministic Z-Interference Channel with Unidirectional Transmitter Cooperation and Secrecy Constraints. In: IEEE International Symposium on Information Theory (ISIT), JUN 14-19, 2015, Hong Kong, PEOPLES R CHINA, pp. 944-948.

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Abstract

This paper derives the capacity region of the 2-user symmetric linear deterministic Z-interference channel (Z-IC) with limited-rate unidirectional cooperation between the transmitters and secrecy constraints at the receivers. The proposed achievable scheme uses a combination of transmission of random bits and interference cancelation. A novel outer bound is derived, based on carefully selecting the side information, and partitioning the encoded message/output depending on the relative strength of the signal and the interference. The derived bounds match, thereby characterizing the secrecy capacity region of the symmetric Z-IC with unidirectional transmitter cooperation. Interestingly, it is found that, in the weak/moderate interference regime, the capacity region does not decrease due to the secrecy constraint at the receiver. Hence, the proposed scheme achieves the capacity of the Z-IC for the weak/moderate interference regime with and without secrecy constraints at the receivers. The results highlight the role of the unidirectional transmitter cooperation in facilitating secure communication over a 2-user Z-IC in the high interference regime.

Item Type:	Conference Proceedings
Series.:	IEEE International Symposium on Information Theory
Additional Information:	Copy right for this article belongs to the IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	07 Dec 2016 05:29
Last Modified:	07 Dec 2016 05:29
URI:	http://eprints.iisc.ac.in/id/eprint/55508

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