| 摘要 |
A distance-measuring receiver and system uses a transmitter which transmits only a single continuous-wave signal. The receiver produces a first component and a second component from the received signal. The first component is frequency doubled and used to produce a signal indicative of the beginning of a measurement window. The second component is used to produce a signal indicative of the end of the measurement window. The size of the measurement window can be used to produce a real time indication of the position of the receiver form the transmitter.
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