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1. MYPI 20091552 - SYSTEMS AND METHODS FOR DETECTING THE PRESENCE OF A TRANSMISSION SIGNAL IN A WIRELESS CHANNEL

Office Malaisie
Numéro de la demande PI 20091552
Date de la demande 10.11.2007
Numéro de publication PI 20091552
Date de publication 19.07.2012
Type de publication A
CIB
H ÉLECTRICITÉ
04
TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
L
TRANSMISSION D'INFORMATION NUMÉRIQUE, p.ex. COMMUNICATION TÉLÉGRAPHIQUE
27
Systèmes à porteuse modulée
H04L 27/00
Déposants QUALCOMM INCORPORATED
Inventeurs SHELLHAMMER, STEPHEN J.
Mandataires PATRICK MIRANDAH
Données relatives à la priorité 11/935,911 06.11.2007 US
60/865,348 10.11.2006 US
Titre
(EN) SYSTEMS AND METHODS FOR DETECTING THE PRESENCE OF A TRANSMISSION SIGNAL IN A WIRELESS CHANNEL
Abrégé
(EN)
A METHOD FOR DETECTING THE PRESENCE OF A TRANSMISSION SIGNAL IN A WIRELESS SPECTRUM CHANNEL. THE FREQUENCY OF A SIGNAL IS CONVERTED (302) FROM A FIRST FREQUENCY TO A SECOND FREQUENCY. THE SIGNAL WITH THE SECOND FREQUENCY IS FILTERED (304) TO REMOVE SIGNALS THAT ARE NOT WITHIN THE BAND OF THE SECOND FREQUENCY. AN AVERAGED PERIODOGRAM (712) OF THE SIGNAL IS CALCULATED (306). A VALUE OF THE AVERAGED PERIODOGRARN (712) IS COMPARED (310) TO A THRESHOLD. THE PRESENCE OF THE TRANSMISSION SIGNAL IS DETECTED, IF THE VALUE OF THE AVERAGED PERIODOGRAM (712) EXCEEDS THE THRESHOLD.