Pulse or digital communications – Receivers
Reexamination Certificate
2007-11-06
2011-10-04
Ahn, Sam K (Department: 2611)
Pulse or digital communications
Receivers
Reexamination Certificate
active
08031807
ABSTRACT:
A method for detecting the presence of a transmission signal in a wireless spectrum channel. The frequency of a signal is converted from a first frequency to a second frequency. The signal with the second frequency is filtered to remove signals that are not within the band of the second frequency. An averaged periodogram of the signal is calculated. A value of the averaged periodogram is compared to a threshold. The presence of the transmission signal is detected, if the value of the averaged periodogram exceeds the threshold.
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Ahn Sam K
Hooks William M.
QUALCOMM Incorporated
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