• KSII Transactions on Internet and Information Systems
    Monthly Online Journal (eISSN: 1976-7277)

Degrees of Freedom of 3-user MIMO Interference Channels with Instantaneous Relay Using Interference Alignment


Abstract

Instantaneous relay (relay-without-delay) using interference alignment is a promising approach to neutralizing interference and improving system capacity. In Wang Chenwei's work, a 2-user scenario required both source and relay to access the global channel state information (CSI). This paper shows a new method of interference alignment improves the degrees of freedom (DoF) prominently for the 3-user MIMO interference channel with instantaneous relay. This new method is focused on the relay node that completes the is focused on the relay node that completes the mitigated. In addition, the 3-user MIMO interference channels with instantaneous relay can achieve 2M DoF when source and destination have M antennas, respectively. This method shows 33% improvement over the conventional method using interference alignment which obtains 3M / 2 DoF.


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Cite this article

[IEEE Style]
W. Qiang, S. Yuquan, D. Minhua, X. Ji and T. Xiaofeng, "Degrees of Freedom of 3-user MIMO Interference Channels with Instantaneous Relay Using Interference Alignment," KSII Transactions on Internet and Information Systems, vol. 9, no. 5, pp. 1624-1641, 2015. DOI: 10.3837/tiis.2015.05.004.

[ACM Style]
Wang Qiang, Shu Yuquan, Dong Minhua, Xu Ji, and Tao Xiaofeng. 2015. Degrees of Freedom of 3-user MIMO Interference Channels with Instantaneous Relay Using Interference Alignment. KSII Transactions on Internet and Information Systems, 9, 5, (2015), 1624-1641. DOI: 10.3837/tiis.2015.05.004.