RECEIVERS AND METHODS FOR DETECTING FALSE LOCK OF A CARRIER TRACKING LOOP
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United States of America Patent
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Issued Date -
Nov 27, 2014
app pub date -
Mar 31, 2014
filing date -
May 24, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for detecting a false lock of a carrier tracking loop is described. The method includes obtaining an average output of each of one or more loop discriminators in a predetermined time period when the carrier tracking loop works in a first mode; and determining whether the carrier tracking loop is falsely locked when the absolute value of the average output of any of the one or more loop discriminators is greater than a respective threshold associated with the corresponding loop discriminator. The carrier tracking loop comprises the frequency-locked loop and the phase-locked loop in the first mode. The one or more discriminator loops may include a frequency-locked discriminator loop, a phase-locked discriminator loop, or a combination thereof.
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