Main enablers for advanced interference mitigation

Interference mitigation is currently one of the main challenges for cellular mobile radio systems and one promising approach are coordinated multipoint transmission techniques like joint precoding (JP), currently being analyzed within the 3GPP CoMP study item (SI). A previous LTE Release 10 CoMP study item concentrated on low complex intra eNB cooperation resulting in limited performance gains, easily being spoiled in case of realistic channel estimation and feedback assumptions. Within the European Union founded project Artist4G the focus is on main enablers for JP CoMP, providing considerable system level gains simultaneously with effective channel estimation and feedback. The so-called partial CoMP scheme for user centric clustering is introduced, approaching theoretical cooperation gains for practical systems. To overcome channel state information (CSI) outdating and simultaneously minimizing feedback overhead a model based channel prediction concept is proposed. It uses reporting of 3-dimensional UE locations with respect to a building vector data model instead of explicit or implicit channel components.