H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 1/46 (2006.01)
Patent
CA 2667739
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.
L'invention concerne un procédé destiné à détecter la présence d'un signal de transmission dans un canal de spectre sans fil. La fréquence d'un signal est convertie d'une première fréquence en une seconde fréquence. Le signal ayant la seconde fréquence est filtré de manière à éliminer les signaux qui ne sont pas dans la bande de la seconde fréquence. Un périodogramme moyenné du signal est calculé. Une valeur du périodogramme moyenné est comparée à un seuil. La présence du signal de transmission est détectée si la valeur du périodogramme moyenné dépasse le seuil.
Qualcomm Incorporated
Smart & Biggar
LandOfFree
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