发明名称 |
Frequency normalization utilizing GPS pulse time and time interval signal |
摘要 |
A local oscillator frequency measurement system for measuring the frequency of a local oscillator of an ESM receiver. The frequency measurement system includes a global positioning system (GPS) receiver (20) for providing a GPS pulse time and time interval signal; a threshold detector (45) responsive to the GPS pulse time and time interval signal for detecting pulses in the GPS pulse time and time interval signal for providing an output indicative of the occurrences of the pulses; a counter (41) clocked by the output of the local oscillator for providing a counter output; a latch (43) for sampling the counter output pursuant to detection of the pulses to provide sampled counts, whereby the sampled counts represent the outputs of the counter at the time the pulses are detected; and a processor (50) for processing the sampled counts to determine the frequency of the local oscillator.
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申请公布号 |
US5737715(A) |
申请公布日期 |
1998.04.07 |
申请号 |
US19960636290 |
申请日期 |
1996.04.23 |
申请人 |
HUGHES ELECTRONICS |
发明人 |
DEATON, ROBERT A.;LIOIO, RICK J. |
分类号 |
G01S1/00;(IPC1-7):H04B7/185 |
主分类号 |
G01S1/00 |
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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