Method and arrangement for forming a beam

摘要

The invention relates to a method and an arrangement for forming a beam for transmission in a TDD communication system, wherein an antenna comprises several elements. A multipath propagated signal is received and an antenna response is estimated. A subset of the responses is selected and beam forming coefficients are calculated by using the selected subset. The signal to be transmitted is multiplied by the beam forming coefficients. The inventive solution can be used in a call set-up.