Linear Degrees-of-Freedom for the M x N MIMO Interference Channels With Constant Channel Coefficients

被引:4
作者
Jung, Sungkyu [1 ]
Lee, Jungwoo [1 ]
机构
[1] Seoul Natl Univ, Sch Elect Engn & Comp Sci, Seoul 151744, South Korea
关键词
Degrees-of-freedom; interference channel; MIMO; ALIGNMENT; NETWORKS;
D O I
10.1109/TSP.2012.2211590
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper analyzes the linear degrees of freedom (LDoF) for K-user M x N MIMO interference channels with constant channel coefficients. In this correspondence, we interpret the interference alignment problem as a multivariate polynomial system in terms of properness. The properness provides a LDoF upperbound for interference alignment. With this approach, we propose a method to obtain the upperbound for total LDoF achievable by linear interference alignment. The LDoF upperbound for properness condition results have two different cases which depend on the number of users, the number of transmit antennas, and the number of receive antennas. A key contribution of this paper is that it provides a closed-form LDoF upperbound for M x N MIMO interference channels where the LDoF of each user may be different.
引用
收藏
页码:6097 / 6103
页数:8
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