Patent ID: 8724447

Claim:
A method reducing false positives when identifying a symbol of a stream input signals that are obscured by noise or multipath effects, comprising: receiving the stream input signals at least some being associated with a pilot symbol; generating correlation outputs forming a correlation curve from the signals and delayed copies thereof; generating first and second running counts when the correlation outputs are above or below a threshold, wherein: a correlation output that is above the threshold potentially indicates that a symbol is being transmitted at that time, a correlation output that is below the threshold potentially indicates that a symbol is not being transmitted at that time, wherein due to the noise or the multipath effects, ones the correlation outputs are falsely above the threshold during a time period that does not include a symbol and ones the correlation outputs are falsely below the threshold during a time period that does include a symbol; detecting a potential leading edge the correlation curve based on the first running count; confirming detection the potential leading based on the second running count, wherein confirming detection of the potential leading edge includes determining whether the potential leading is a false leading edge based on the second running count; and in response to confirming the potential leading edge, detecting a trailing edge the curve based on the second running count.