Channel information prediction system and channel information prediction method

A channel information prediction system configured to calculate future channel information being a prediction value of channel information in a future by using the channel information and a transformation matrix in a multi-antenna transmission system where at least any one of a transmitter side and a receiver side of a radio signal uses an antenna array formed of a plurality of antennas, the channel information indicating a transmission path characteristic between the transmitter side and the receiver side, the channel information prediction system comprising:

• a transformation matrix calculator configured to calculate the transformation matrix based on one of an array response and an array weight of the antenna array correlated with at least one of an arrival direction and a departure direction of the radio signal by using a direction estimation technique for estimating at least one of the arrival direction and the departure direction, wherein the transformation matrix calculator estimates at least one of the arrival direction and the departure direction by using the direction estimation technique and calculates the transformation matrix based on at least one of the estimated arrival and departure directions and wherein the antenna array is used on the transmitter side, a transmission directivity of the antenna array on the transmitter side is controlled according to the transformation matrix, and the transformation matrix calculator directs a null being a drop point of the transmission directivity to the departure direction of at least one ray among a plurality of rays forming the radio signal by using the transformation matrix.