Multi-antenna cell constellations for interference management in dense urban areas

The aim of this paper is to present and propose different multi-antenna cell constellations based on outdoor distributed antenna system implementation. The idea of the outdoor DAS is to reduce interference in dense urban areas in order to achieve very high signal-to-interference-ratios (SIR) which defines the data throughput available to the user. Moreover, the SIR distribution over the network coverage area has to be as constant as possible in order to keep throughput in maximum and constant. Analysis of different multi-antenna constellations are presented and interference behavior is compared to independent small cell i.e. micro/pico/femto cells. The obtained results show superior SIR distribution for multi-antenna layout compared to independent small cells. Strategic antenna placement and configuration of eight antennas per cell result in average SIR of 23 dB over the cell coverage area.