Abstract:
An MIMO(Multi-Input Multi-Output) system and a method for demodulating a transmitting vector in the receiver of the system are provided to enable the receiver to detect a transmitting vector on the basis of a transmitting antenna signal of which the modulation order is the lowest, thereby easily detecting the transmitted transmitting vector. A receiver in an MIMO(Multi-Input Multi-Output) system comprises the followings: a first multiplication unit(320) which multiplies a receiving vector(r) received through an antenna; a substitute transmitting vector detecting unit which detects the signal of a transmitting antenna of which the modulation order is the lowest in the receiving vector outputted from a first multiplication unit, creates symbol substitutes as much as the modulation order of the detected signal, and detects a substitute transmitting vector by using each symbol substitute; a transmitting vector determining unit(340) which separately calculates a distance between the substitute transmitting vector and the receiving vector detected in the substitute transmitting vector detecting unit and determines the final transmitting vector; and a demodulation unit(350) which demodulates and outputs the final transmitting vector determined in the transmitting vector determining unit.