System and method for re-transmitting uplink transmission blocks in multi-antenna system

A system and a method for re-transmitting uplink transmission blocks in a multi-antenna system are provided by the present invention. The method includes: setting a pre-coding matrix of transmission blocks re-transmitted by a terminal, when the uplink transmission blocks of the multi-antenna system are re-transmitted and there is no corresponding downlink control information. The terminal implements pre-coding based on the set pre-coding matrix and re-transmits the transmission blocks. The technical solutions of the present invention solve the problem that the terminal selects the pre-coding matrix when there is no signaling in a base station to instruct the terminal which PMI should be used, and can further solve the problem that how to configurate the cyclic shift of the demodulation reference signal when there is no signaling in the base station to instruct the terminal the cyclic shift of the uplink demodulation reference signal.