Antenna selection and power distribution method based on energy efficiency

The invention provides an antenna selection and power distribution method based on energy efficiency. The method comprises the steps as follows: step S1) obtaining channel state information transmitted by each mobile terminal; step S2) ordering channel conditions of all transmitting antennas according to good and bad conditions in accordance with the channel state information, transmitting the front Ntt transmitting antennas to form a transmitting antenna set; calculating energy efficiency optimal value of all transmitting antenna combinations in the transmitting antenna set (img file is equal to DDA0000697273720000011. TIF wi is equal to 86 and he is equal to 78), wherein the corresponding antenna combination thereof is (img file is equal to DDA0000697273720000012. TIF wi is equal to 76 and he is equal to 76); then selecting the front Ntt adds 1 transmitting antennas to form the transmitting antenna set, calculating (img file is equal to DDA0000697273720000013. TIF wi is equal to 112 and he is equal to 85), wherein the (img file is equal to DDA0000697273720000015. TIF wi is equal to 68 and he is equal to 78) is an optimal antenna combination if (img file is equal to DDA0000697273720000014. TIF wi is equal to 238 and he is equal to 83), otherwise enabling Ntt to be equal to Ntt adds 1, and repeating the above processes until the antennas in the transmitting antenna set are all transmitting antennas; step S3) performing transmitting power distribution to the transmitting antennas in the optimal antenna combination by using secondary allocation. The method of the invention effectively avoids energy surplus of the mobile terminal, achieves maximum usage of whole system energy, and greatly reduces algorithm complexity in comparison with existing method.