On the Feasibility of Interference Alignment in the Cellular Network

• Hua Chen,
• Shan Wu,
• Ping Hu,
• Zhudi Xu,

Vol. 11, No. 11, November 29, 2017
10.3837/tiis.2017.11.008, Download Paper (Free):

• multiple cell
• interference alignment
• MIMO
• interference broadcast channel

Abstract

In this paper, we investigate the feasibility of interference alignment(IA) in signal space in the scenario of multiple cell and multiple user cellular networks, as the feasibility issue is closely related to the solvability of a multivariate polynomial system, we give the mathematical analysis to support the constraint condition obtained from the polynomial equations with the tools of algebraic geometry, and a new distribute IA algorithm is also provided to verify the accessibility of the constraint condition for symmetric system in this paper. Simulation results illustrate that the accessibility of the constraint condition is hold if and only if the degree of freedom(DoF) of each user can be divided by both the transmit and receive antenna numbers.

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