… 1Note that in (2) we assume that the small cells are sufficiently far apart from each other
so that the inter-small-cell interference can be ignored. This is also true for dense small cells …

… , which bring different interference scenarios: • The small cell can be operated in the closed
… The small cell may cause high interference to nearby macrocell users in downlink (DL) …

… Abstract—In this paper, we study downlink beamforming for … an antenna array for downlink
beamforming. We formulate a … ) relaxation, for downlink beamforming that takes advantage of …

… In this paper, we propose the capacity enhancement for small cells under macrocell-assisted …
the downlink transmission in a homogeneous network consisted of M small cell sites and K …

… network to accomplish “macrodiversity” transmit beamforming. The particular downlink
beamformer structure we consider allows a recasting of the downlink beamforming problem as a …

… downlink only, since this link presents more challenges and constraints for implementation
of beamforming … constraints for use of beamforming within logical cells on different transport …

… We consider downlink transmission in a homogeneous network of M small cell sites and L
UEs. It is noted that we assume the small cells operate in higher frequency bands, such as 3-…

… The optimal weights for the down-link beam forming … down-link beam forming for phase-shift-keying
(PSK) modulation based on subspace decomposition. A down-link beam-forming …

… vectors that can be estimated and for which the downlink precoder can be calculated. Each
CN serves its SBSs by using linear zero-forcing beamforming (LZFBF) with equal power per …

… OPTIMAL BEAMFORMING FOR SINGLE CELL In this section we briefly summarize a
downlink beamforming algorithm proposed in [19]. This algorithm equalizes the ratios of the …