Implementation aspects of downlink multiuser MIMO system with distributed and coherently-coordinated transmit antennas

In this paper we present implementation aspects of a multiuser MIMO experimental system and the corresponding indoor measurement results that demonstrate power of distributed and coherently-coordinated downlink transmit antennas using zero-forcing (ZF) beamforming. We present functional partitioning between a DSP and FPGA platform and give implementation details and required resources. We demonstrate significant gains as well as moderate implementation requirements.