BeanForming Method using Multiple Antenna

The mobile station downlink by an independent at least one training signal a plurality of mobile station antenna included and, independently of at least one training signal a plurality of mobile stations each of a plurality of base station antennas and using a receiving antenna, respectively from a plurality of base station antenna It estimates the channel. The mobile station forms a transmission beam for transmitting signals in uplink to a plurality of mobile station antenna by generating a beam vector by a downlink channel and using the beam vector. Multiple antennas, TDD, reversible, beam forming, the uplink, mobile station