SPACE-DIVISION MULTIPLE-ACCESS (SDMA) FIELD TRIALS - PART-1 - TRACKING AND BER PERFORMANCE

An adaptive antenna testbed for mobile communication applications is b riefly described and results from field trials presented. The goal is to provide an experimental demonstration of both transmit and receive digital beamforming supporting SDMA user access. Trials are presented for a typical urban environment with different combinations of user po sitions and the ability of the employed adaptive algorithm to establis h the link and track the channels is investigated alongside the link B ER performance. The tracking performance of the adaptive algorithm use d for SDMA is also tested for an indoor environment against maximum ra tio combining and a fixed grid of beams.