Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Reexamination Certificate
2007-12-11
2007-12-11
Le, Lana (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
C455S182200, C455S136000, C455S164100
Reexamination Certificate
active
10873265
ABSTRACT:
An apparatus and method for performing automatic frequency control of a mobile communication terminal detects a current peak position value from a downlink pilot signal and then calculates a difference value (dev) between the current peak position and a previous peak position value. A zero-run value is then calculated by counting the number of successive 0s in the difference value (dev), and an AFC voltage from controlling an oscillator is obtained based on the difference value. This difference value is then used to control a frequency of a transmitter in the terminal. Accordingly, an accurate oscillation frequency can be generated without being affected by noise existing in the communication environment and thus communication performance can be enhanced.
REFERENCES:
patent: 3495242 (1970-02-01), Dickey, Jr.
patent: 3512089 (1970-05-01), Cushman
patent: 3611152 (1971-10-01), Sakai et al.
patent: 4176351 (1979-11-01), DeVita et al.
patent: 4580101 (1986-04-01), Lax
patent: 4939789 (1990-07-01), Sakashita et al.
patent: 5668829 (1997-09-01), Saito
patent: 5684836 (1997-11-01), Nagayasu et al.
patent: 6181923 (2001-01-01), Kawano et al.
patent: 6359938 (2002-03-01), Keevill et al.
patent: 6385232 (2002-05-01), Terashima
patent: 6560303 (2003-05-01), Fan et al.
patent: 6571088 (2003-05-01), Hasegawa
patent: 7013135 (2006-03-01), Hiramatsu
patent: 2004/0043746 (2004-03-01), Hiramatsu
patent: 0689313 (1995-12-01), None
patent: 07-321762 (1995-12-01), None
patent: 09-219692 (1997-08-01), None
patent: 2000174662 (2000-06-01), None
patent: 2000-278254 (2000-10-01), None
patent: 2002-252665 (2002-09-01), None
patent: 2002-0057822 (2002-07-01), None
patent: 03/030400 (2002-09-01), None
European Search Report dated Oct. 12, 2004.
Japanese Office Action dated Jun. 21, 2006.
Ked & Associates LLP
Le Lana
LG Electronics Inc.
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