| 摘要 |
A transmission apparatus for a round-trip satellite which can establish stabilized frame synchronization even if the distance between the round-trip satellite and a communications terminal varies and which can minimize the displacement between a frame signal received on the ground and another frame signal generated in a communications terminal. The transmission apparatus comprises M (M is an integral number equal to or greater than 2) composers (3) for forming frame signals, M transmitters (8) for outputting M spot beams having different radiation directions, and M delay circuits (6) interposed between the composers (3) and the transmitters (8). The delay times of the delay circuits (6) are set so that they are long where the radiation angles of the corresponding spot beams are small, but they are shorter where the radiation angles are larger. <IMAGE> |
