A system comprising: an aerial-staying type communication relay apparatus that wirelessly communicates with a terminal apparatus; and plural gateway stations for transmitting and receiving relay signals different from each other on a same frequency in feeder links between the aerial-staying type communication relay apparatus and the plural gateway stations, the plural gateway stations being controlled so as to be in a time synchronization with each other with respect to a transmission timing, wherein the aerial-staying type communication relay apparatus comprises an interference suppression section that suppresses interference between plural feeder links formed between the plural gateway stations and the aerial-staying type communication relay apparatus, and wherein the interference suppression section: calculates, for each of the plural gateway stations, a weight for suppressing an interference signal causing an interference, the interference being caused by a transmission signal transmitted from the gateway station and received by a directional beam corresponding to another gateway station, and subtracts, for each of the plural gateway stations, a reception signal received by a directional beam corresponding to another gateway station multiplied by the weight corresponding to the other gateway station, from the reception signal received by the directional beam corresponding to each of the gateway stations. an aerial-staying type communication relay apparatus that wirelessly communicates with a terminal apparatus; and plural gateway stations for transmitting and receiving relay signals different from each other on a same frequency in feeder links between the aerial-staying type communication relay apparatus and the plural gateway stations, the plural gateway stations being controlled so as to be in a time synchronization with each other with respect to a transmission timing, wherein the aerial-staying type communication relay apparatus comprises an interference suppression section that suppresses interference between plural feeder links formed between the plural gateway stations and the aerial-staying type communication relay apparatus, and wherein the interference suppression section: calculates, for each of the plural gateway stations, a weight for suppressing an interference signal causing an interference, the interference being caused by a transmission signal transmitted from the gateway station and received by a directional beam corresponding to another gateway station, and subtracts, for each of the plural gateway stations, a reception signal received by a directional beam corresponding to another gateway station multiplied by the weight corresponding to the other gateway station, from the reception signal received by the directional beam corresponding to each of the gateway stations. calculates, for each of the plural gateway stations, a weight for suppressing an interference signal causing an interference, the interference being caused by a transmission signal transmitted from the gateway station and received by a directional beam corresponding to another gateway station, and subtracts, for each of the plural gateway stations, a reception signal received by a directional beam corresponding to another gateway station multiplied by the weight corresponding to the other gateway station, from the reception signal received by the directional beam corresponding to each of the gateway stations.