BIDIRECTIONAL RELAY SYSTEM AND METHOD USING PRECODING AND BEAMFORMING

摘要

PURPOSE: A bidirectional relay method using precoding and beamforming is provided to arrange a channel of a terminal by using the calculated weight value. CONSTITUTION: A data obtaining unit obtains data which is transmitted from 2M terminals according to a DaF(Decode and Forward) or AaF(Amplify and Forward) relay method(S310). A common channel space obtaining unit obtains common channel space by using the channel of terminals(S320). A weight calculating unit calculates weights which spans the common channel space in each channel(S330). A channel arranging unit arranges an effective channel of two terminals on the common channel space(S340). A pre-coder pre-codes M relay signals(S380).