The invention discloses an energy efficiency optimization method in a single-user
MIMO distributed
base station system. The energy efficiency optimization method comprises the following steps: firstly, constructing an energy efficiency
optimization problem model under a given remote access
point set, and transforming the problem model into three sub-problems, namely a rate maximization problem, an energy efficiency
optimization problem without rate constraint and a
power minimization problem under the rate constraint, for solution, thereby obtaining the optimal solution of a transmission
covariance and the
maximal energy efficiency; and then orderly bringing access points into an activated access
point set in an order from small to large distances between a user and the access points, obtaining the
maximal energy efficiency based on the
energy rate optimization problem model and determining an access
point set finally selected to transmit information to the user. The energy efficiency optimization method in the single-user
MIMO distributed
base station system is capable of solving the problem of
base station transmission pre-coding design in the single-user
MIMO distributed base
station system and the problem of how to select appropriate distributed access points to maximize the energy efficiency of the system; besides, the energy efficiency optimization method is capable of quickly converging the optimal solution.