| タイトル | Concepts for 20/30 GHz satcom systems for direct-to-user applications |
| 著者（英） | Davies, R.; Jorasch, R.; Baker, M. |
| 著者所属（英） | Ford Aerospace and Communications Corp. |
| 発行日 | 1980-04-01 |
| 言語 | eng |
| 内容記述 | A baseline technique is described for implementing a direct-to-user (DTU) satcom communications system at 20/30 GHz transmission frequency. The purpose of this application is to utilize the high capacity frequency spectrum at K(A) band for communications among thousands of small terminals located at or close to a customer's facility. The baseline DTU system utilizes a TDMA method of communications with QPSK modulation. Twenty-five coverage beams from a geosynchronous orbit spacecraft provide full coverage of CONUS. Low cost terminals are limited to less than 4.5 meters diameter. The impact of rain attenuation on communications availability is examined. Other techniques including satellite switched antenna beams are outlined and critical K(A)-band technology developments are identified. |
| NASA分類 | LAUNCH VEHICLES AND SPACE VEHICLES |
| レポートNO | 80A35329
AIAA PAPER 80-0582 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/421831 |
