On Downlink Beamforming with Small Cells in Wireless Heterogeneous Systems
Abstract— On Downlink Beamforming with Small Cells in Wireless Heterogeneous Systems. We study downlink beamforming for wireless heterogeneous networks with two groups of users. The users in one group (group 1) are supported by the small cell base station (SBS) as well as the macrocell base station (MBS), while the users in the other group < Final Year Projects 2016 > group 2 are supported by the MBS only. The MBS is equipped with an antenna array for downlink beamforming. We formulate a convex optimization problem, which can be solved by semidefinite programming (SDP) relaxation, for downlink beamforming that takes advan-tage of the presence of the SBS for group 1, but also takes into account the interfering signal from the SBS for group 2.