For the R9 stage of TD-LTE

there’s a new technology TM8（double beam forming）.This paper analyzes the basic principles of TM8

and gives the advantages and disadvantages compared the mode of TM3/7.By analyzing the TM8’s performance in the current network

this paper gives suggestions about the TM8 applying in the network

in order to provide some reference for the construction and application of the TD-LTE.