A system-level study on multi-user MIMO Transmission for dense FDD networks

The need for cell densification leads to inter-cell interference mitigation techniques known as coordinated multipoint (CoMP) transmission and reception. In this work, we start from the weighted sum-rate maximization problem by evaluating the capacity of the broadcast channel (BC). We employ non-linear dirty paper coding (DPC) on a cluster basis with additional co-channel interference (CCI) caused from surrounding base stations (BSs). These results characterize the capacity of the BC under cellular propagation conditions. Subsequent, we summarize multi-cell simulation results assuming linear precoding and non-ideal clustering as well as user grouping. For downlink pre-coding we compare the well-studied limited feedback assumption, zero-forcing (ZF) beamforming for joint transmission downlink CoMP and compare their resulting sum-rates with the derived BC capacity

D3.2 First performance results for multi -node/multi -antenna transmission technologies

This deliverable describes the current results of the multi-node/multi-antenna technologies investigated within METIS and analyses the interactions within and outside Work Package 3. Furthermore, it identifies the most promising technologies based on the current state of obtained results. This document provides a brief overview of the results in its first part. The second part, namely the Appendix, further details the results, describes the simulation alignment efforts conducted in the Work Package and the interaction of the Test Cases. The results described here show that the investigations conducted in Work Package 3 are maturing resulting in valuable innovative solutions for future 5G systems.Fantini. R.; Santos, A.; De Carvalho, E.; Rajatheva, N.; Popovski, P.; Baracca, P.; Aziz, D.... (2014). D3.2 First performance results for multi -node/multi -antenna transmission technologies. http://hdl.handle.net/10251/7675