发明名称 |
VSAT frequency source using direct digital synthesizer |
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.
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申请公布号 |
US5995812(A) |
申请公布日期 |
1999.11.30 |
申请号 |
US19950523105 |
申请日期 |
1995.09.01 |
申请人 |
HUGHES ELECTRONICS CORPORATION |
发明人 |
SOLEIMANI, MOHAMMAD;CORRIGAN, III, JOHN E. |
分类号 |
H04B7/185;(IPC1-7):H04B7/155 |
主分类号 |
H04B7/185 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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