Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Reexamination Certificate
2011-01-04
2011-01-04
Urban, Edward (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
C455S179100, C455S184100, C455S185100
Reexamination Certificate
active
07865156
ABSTRACT:
One illustrative method of scanning a radio frequency (RF) band (e.g. 850 MHz band) for valid RF carrier signals of a wireless communication network (e.g. a GSM network) includes the steps of monitoring an RF channel to receive a candidate RF carrier signal; identifying whether the candidate RF carrier signal is a valid RF carrier signal of the wireless communication network by estimating a bandwidth of the candidate RF carrier signal and, if the estimated bandwidth is different from a predetermined bandwidth associated with valid RF carrier signals of the wireless communication network, identifying that the candidate RF signal is not a valid RF carrier signal of the wireless communication network; and repeating the acts of monitoring and identifying for a next RF channel of a plurality of RF channels associated with the wireless communication network. Preferably, the RF bandwidth estimation is performed together with a system signal detection process (e.g. FCCH detection). Advantageously, the time required to scan the RF band is reduced.
REFERENCES:
patent: 5574995 (1996-11-01), Masaki
patent: 5806002 (1998-09-01), Wiatrowski et al.
patent: 6122327 (2000-09-01), Watanabe et al.
patent: 6205334 (2001-03-01), Dent
patent: 6434186 (2002-08-01), Dowling
patent: 6487399 (2002-11-01), Rajaniemi et al.
patent: 6687509 (2004-02-01), Schmutz et al.
patent: 6690746 (2004-02-01), Sills et al.
patent: 6816715 (2004-11-01), Mano
patent: 6829471 (2004-12-01), White et al.
patent: 6904269 (2005-06-01), Deshpande et al.
patent: 7024191 (2006-04-01), Ofuji et al.
patent: 7174145 (2007-02-01), Chatelier et al.
patent: 2001/0055328 (2001-12-01), Dowling
patent: 2003/0161411 (2003-08-01), McCorkle et al.
patent: 2005/0227625 (2005-10-01), Diener
patent: 2007/0274477 (2007-11-01), Chen
patent: 2242000 (1999-02-01), None
patent: 0788263 (1997-08-01), None
patent: 0948226 (1999-03-01), None
patent: 0948226 (1999-10-01), None
patent: 1283608 (2003-02-01), None
patent: 1641293 (2005-08-01), None
patent: 2409610 (2005-06-01), None
patent: 0031998 (2000-06-01), None
International Preliminary Report on Patentability, PCT/CA2007/000633, Jun. 9, 2008.
International Search Report & Written Opinion for Application#—PCT/CA2007/000633—Dated Jul. 5, 2007.
Extended European Search Report, EP application No. 07719560.0, Oct. 29, 2009.
Kemenczy Zoltan
Simmons Sean B.
Wu Huan
Hu RuiMeng
Oskorep, Esq. John J.
Research In Motion Limited
Urban Edward
LandOfFree
Scanning methods and apparatus which utilize a carrier... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Scanning methods and apparatus which utilize a carrier..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scanning methods and apparatus which utilize a carrier... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2708788