发明名称 |
Tone based command system for reception of very weak signals |
摘要 |
This disclosure presents a communication receiver system for spacecraft that includes an open loop receiver adapted to receive a communication signal. An ultrastable oscillator (USO) and a tone detector are connected to the open loop receiver. The open loop receiver translates the communication signal to an intermediate frequency signal using a highly stable reference frequency from the USO. The tone detector extracts commands from the communication signal by evaluating the difference between tones of the communication signal.
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申请公布号 |
US2005003791(A1) |
申请公布日期 |
2005.01.06 |
申请号 |
US20040847942 |
申请日期 |
2004.05.18 |
申请人 |
BOKULIC ROBERT STEVEN;JENSEN JAMES ROBERT |
发明人 |
BOKULIC ROBERT STEVEN;JENSEN JAMES ROBERT |
分类号 |
H04B7/185;(IPC1-7):H04B7/185;H04B1/18;H04B1/16;H04Q7/20 |
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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