发明授权
- 专利标题: VSAT frequency source using direct digital synthesizer
- 专利标题(中): VSAT频率源采用直接数字合成器
-
申请号: US523105申请日: 1995-09-01
-
公开(公告)号: US5995812A公开(公告)日: 1999-11-30
- 发明人: Mohammad Soleimani , John E. Corrigan, III
- 申请人: Mohammad Soleimani , John E. Corrigan, III
- 申请人地址: CA El Segundo
- 专利权人: Hughes Electronics Corporation
- 当前专利权人: Hughes Electronics Corporation
- 当前专利权人地址: CA El Segundo
- 主分类号: H04B7/185
- IPC分类号: H04B7/185 ; H04B7/155
摘要:
A frequency generation device for a satellite communication system composed of a central hub station and a number of remote units. The remote units contain a single synthesizer located in an indoor unit. In this invention, the indoor-located synthesizer is a direct digital synthesizer which modulates the baseband signal and conveys the modulated signal to an outdoor unit for communication between the remote unit and the central hub. In the outdoor unit, the signal is converted directly by a fixed number to a Ku band frequency and transmitted to the central hub.
公开/授权文献
- US5099546A Lanyard-gripping handle 公开/授权日:1992-03-31