Abstract—Combating interference is one of the most outstanding challenges in wireless communication networks, especially for cellular networks with frequency reuse one. This issue becomes even more significant in heterogeneous networks wherelowerpower nodes(such aspico-cell and/or femto-cell) are deployed within a macro-cell’s coverage. In this paper, we investigate interference coordination tech-niques in different scenarios.
For homogeneous networks, we study single-cell multi¬user MIMO for the purpose of intra-cell interference coor¬dination and coordinated multi-point(CoMP) transmission for the purpose of inter-cell interference mitigation. For multi-userMIMO systems, we willdiscuss multi-userMIMO proportional-fair scheduling as well as multi-user precoding schemes. For CoMP transmission, we will focus on CoMP joint transmission and discuss the situations where CoMP could provide performance gains over single-cell operations.
For heterogeneous networks, we investigate two specific inter-cell interference coordination techniques: time-domain solutions and power setting schemes. Furthermore, the po-tential extension of various CoMP schemes to heterogeneous networks will also be discussed. Index Terms: Multi-user MIMO, CoMP, Heterogeneous Net¬works, Inter-cell Interference Coordination, LTE-Advanced

Cite:Lingjia Liu, Jianzhong Charlie Zhang, Yang Yi, Hongxiang Li, and Jinyun Zhang, "Combating Interference: MU-MIMO, CoMP, and HetNet (Invited Paper)," Journal of Communications, vol. 7, no.9, pp.646-655, 2012. Doi: 10.4304/jcm.7.9.646-655