Performance of the TSUNAMI (II) macrocellular field trial system using a dynamic interference source

The TSUNAMI (II) project has been an investigation into the application of adaptive antenna technology for use in future generation mobile communications systems. The key aims of the project were to investigate the complexity versus increase in system capacity and coverage extension that can be achieved over the existing, non-adaptive networks. May 1998 saw the completion of an 8 month field trial, covering both macrocellular and microcellular trials. These investigations were performed at the Orange Testbed in Bristol, U.K., using a modified DCS-1800 base station. In this paper are presented a subset of the macrocellular field trial results, obtained using spatial and temporal reference beamforming (TRB and SRB) in the presence of a moving, deliberate interference source. The results presented show the comparative performance of several selected adaptive antenna algorithms used by the TSUNAMI (II) testbed. The results of these trials demonstrate how the interference source and chosen algorithm's ability to track wanted to unwanted users influences the overall performance of the adaptive antenna base station (AA-BSS).