A wireless communication system (1; 1-1; 2; 3; 4; 5; 6; 7) comprising: a plurality of transmission devices to transmit signals including different known sequences using a same frequency; and characterized by a reception device provided in a moving object and including a plurality of antennas, wherein the reception device is adapted to perform channel estimation using reception signals received by the plurality of antennas, at least one of a plurality of the known sequences corresponding to the plurality of transmission devices, and an average time parameter that is based on a moving speed of the moving object, the average time parameter being a parameter for determining a range of symbols to be subjected to the channel estimation; to generate an interference signal sequence using a result of the channel estimation as a channel coefficient corresponding to a central symbol in the range; to generate, using the interference signal sequence, a weight for removing the interference signal sequence; and to combine the reception signals received by the plurality of antennas using the weight; wherein the reception device (20D; 20E) includes: an interference signal generation unit to generate the interference signal using a channel coefficient obtained as a result of the channel estimation and the known sequence inserted into the interference signal; a target signal generation unit to generate a target signal using a channel coefficient obtained as a result of the channel estimation and the known sequence inserted into the target signal; an interference signal extraction unit to extract the interference signal by subtracting the target signal from the reception signal; and an interference signal selection unit to select a first interference signal that is the interference signal generated by the interference signal generation unit or a second interference signal that is the interference signal extracted by the interference signal extraction unit; wherein the interference signal selection unit selects the first interference signal or the second interference signal based on an average power of the channel coefficient. a plurality of transmission devices to transmit signals including different known sequences using a same frequency; and characterized by a reception device provided in a moving object and including a plurality of antennas, wherein the reception device is adapted to perform channel estimation using reception signals received by the plurality of antennas, at least one of a plurality of the known sequences corresponding to the plurality of transmission devices, and an average time parameter that is based on a moving speed of the moving object, the average time parameter being a parameter for determining a range of symbols to be subjected to the channel estimation; to generate an interference signal sequence using a result of the channel estimation as a channel coefficient corresponding to a central symbol in the range; to generate, using the interference signal sequence, a weight for removing the interference signal sequence; and to combine the reception signals received by the plurality of antennas using the weight; wherein the reception device (20D; 20E) includes: an interference signal generation unit to generate the interference signal using a channel coefficient obtained as a result of the channel estimation and the known sequence inserted into the interference signal; a target signal generation unit to generate a target signal using a channel coefficient obtained as a result of the channel estimation and the known sequence inserted into the target signal; an interference signal extraction unit to extract the interference signal by subtracting the target signal from the reception signal; and an interference signal selection unit to select a first interference signal that is the interference signal generated by the interference signal generation unit or a second interference signal that is the interference signal extracted by the interference signal extraction unit; wherein the interference signal selection unit selects the first interference signal or the second interference signal based on an average power of the channel coefficient. an interference signal generation unit to generate the interference signal using a channel coefficient obtained as a result of the channel estimation and the known sequence inserted into the interference signal; a target signal generation unit to generate a target signal using a channel coefficient obtained as a result of the channel estimation and the known sequence inserted into the target signal; an interference signal extraction unit to extract the interference signal by subtracting the target signal from the reception signal; and an interference signal selection unit to select a first interference signal that is the interference signal generated by the interference signal generation unit or a second interference signal that is the interference signal extracted by the interference signal extraction unit; wherein the interference signal selection unit selects the first interference signal or the second interference signal based on an average power of the channel coefficient.