VLSI implementation of channel estimation for millimeter wave beamforming training

Channel estimation is an important issue for systems employing large antenna arrays with beamforming targeting 60 GHz short range wireless communications. New methods have to be derived to overcome the growing complexity of tradition channel estimation algorithms. E.g. a Hierarchical Beamforming Training inspired by the sparsity of a mm-wave channel is a promising approach to lower this complexity. This paper presents two efficient VLSI implementation for two similar beamforming training algorithm. A following survey indicates the benefits and costs of the reduced complexity between both variants.