Method and apparatus for detecting a waveform
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United States of America Patent
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Apr 22, 2003
Grant Date -
N/A
app pub date -
Feb 8, 2001
filing date -
Feb 8, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device for detecting a predetermined waveform in a received signal and synchronizing the detected waveform to the predetermined waveform is disclosed. The device includes a memory element for storing a reference set of encoded values. The reference set representing an encoded version of the predetermined waveform. An encoder is used to PCM encode the signal to obtain sets of encoded values representing the received signal. A processor calculates the statistical correlation coefficient of the reference set and the signal sets. The processor then determines the maximum statistical correlation coefficient. The predetermined waveform is detected in the signal if the maximum statistical correlation coefficient is greater than or equal to a predetermined threshold value. The device provides a compact, inexpensive, and fast method for detecting a known reference waveform in a received signal. This method can also be used to synchronize the signal to the known reference waveform for a point-by-point comparison of the two signals.
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