  Dealing with broadcast scenarios has become a relevant topic in the
scientific community. Because of interference, resource management presents a
challenge, specially when spatial diversity is introduced. Many researches
presented theoretical benchmarks, simplifications and low complex schemes, but
in fact it is difficult the real implementation.
  The major part of current works propose iterative solutions, which are far
away of feasible results. Since the problem is not convex, iterative solutions
are prohibitive. Moreover, they always require the full knowledge of the
channel state information. Hence, the feedback channel is often unaffordable
and makes impossible to carry a huge amount of information.
  The present work aims to fill this gap presenting a novel scheme, from the
theoretical framework to realistic scheme. It introduces the solution of the
maximization of the sum rate in the broadcast scenario with multiple antennas
at the transmitter. This solution aims to be realistic and to distribute the
complexity between the base station and user equipment.
  Also, due to its construction, it opens the door to be compatible with LTE
standards with no relevant changes. Thus, it allows to combine the resource
allocation with scheduling tasks in a LTE environment, fulfilling the feedback
requirements and maximizing the sum rate of the system.
