Sum-Rate Upper Bounds for the Gaussian X Channel with Limited Receiver Cooperation

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Published: Mar 22, 2017
DOI: https://doi.org/10.37936/ecti-eec.2017152.171314
Keywords:
Genie-aided techniques Receiver cooperation Sum-rate upper bound X channel

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Surapol Tan-a-ram
Department of Electrical Engineering, Faculty of Engineering, Chulalongkorn University, and National Electronics and Computer Technology Center (NECTEC), National Science and Technology Development Agency (NSTDA)
Watit Benjapolkul
Department of Electrical Engineering, Faculty of Engineering, Chulalongkorn University

Abstract

In this paper, we propose sum-rate upper bounds in terms of the sum of 3 rates and the sum of 4 rates for the two-user Gaussian X channel with limited receiver cooperation. These upper bounds are derived by using the Fano's inequality, the data processing inequality and genie-aided techniques. Then, we explore the generalized degrees of freedom (GDoF) of the proposed upper bounds with a symmetric channel setting. By setting a certain set of parameters, the received results show that our results are identical to the existing results for both non-cooperation and limited receiver cooperation cases. Moreover, we obtain that the GDoF computed from our proposed
upper bounds are greater than the GDoF of those in the non-cooperation case.

Article Details

How to Cite
Tan-a-ram, S., & Benjapolkul, W. (2017). Sum-Rate Upper Bounds for the Gaussian X Channel with Limited Receiver Cooperation. ECTI Transactions on Electrical Engineering, Electronics, and Communications, 15(2), 26–35. https://doi.org/10.37936/ecti-eec.2017152.171314
Issue
Vol. 15 No. 2 (2017): Regular Issue
Section
Communication Systems

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