This paper presents an experimental 8$B!_(B8 (eight transmit antennas at the base station to four user equipments with two antennas) multiuser multi-input multi-output (MIMO) system where the block diagonalized vector perturbation (BD-VP) is embedded as a candidate for a non-linear MIMO algorithm. The advantages of BD-VP over MMSE were confirmed by field measurement using the experimental system in an indoor line-of-sight environment.