METHOD FOR CANCELLING INTERFERENCE SIGNAL OF BASE STATION IN A MULTIUSER MIMO RELAY SYSTEM

摘要

PURPOSE: A method for removing a interference signal of a base station in a multi user MIMO(Multi Input Multi Output) relay system is provided to make base station to take full charge of role of a relay station, thereby relay station can provide effect which used a pretreatment filter only by a simple power restriction parameter. CONSTITUTION: A signal transmitted from the relay station is estimated by using channel information between a relay station(200) and a terminal(300) and a signal transmitted to a terminal. A base station estimates a signal which will transmit to the relay station through a transmission signal of the estimated relay station. It multiplies a power restriction coefficient which is received from the base station with a signal which is pretreated. By considering the state of a channel between the relay station and a terminal, it estimated a signal which will transmit the relay station by applying a THP(Thomlinson-Harashima precoding).