Pulse or digital communications – Receivers – Automatic gain control
Reexamination Certificate
2005-06-24
2010-06-29
Phu, Phuong (Department: 2611)
Pulse or digital communications
Receivers
Automatic gain control
C375S260000, C375S340000, C375S362000, C455S232100, C455S234100, C455S234200, C455S245100, C370S509000
Reexamination Certificate
active
07746966
ABSTRACT:
The present invention relates to a method for automatic gain control (AGC) before an initial synchronization of a mobile station modem in OFDM system, and an apparatus thereof. The AGC apparatus includes: an initial synchronization inspector that verifies whether an initial synchronization for an input block sample (k) signal has been performed; a frame divider that divides a frame into predetermined intervals B(k) for the input block sample(k) signal in the case that the initial synchronization has not been performed; a reference value inspector that compares a difference value Pref−Pcalc, between a predetermined reference value Pref and sample data average energy Pcalc, with a predetermined value; a count controller that increases or decreases the count when the difference value Pref−Pcalc compared by the reference value inspector is greater or less than the predetermined value; a count inspector that inspects whether the count is greater or less than 0 when the input block sample (k) reaches a maximum value MAX; and a gain controller which increases or decreases the gain, level by level, according to the count inspection result of the count inspector.
REFERENCES:
patent: 6574292 (2003-06-01), Heinonen et al.
patent: 6782063 (2004-08-01), Stevenson et al.
patent: 7251282 (2007-07-01), Maltsev et al.
patent: 7295517 (2007-11-01), Anim-Appiah et al.
patent: 7457366 (2008-11-01), Maltsev et al.
patent: 2001/0055350 (2001-12-01), Higure
patent: 2002/0090042 (2002-07-01), Heinonen et al.
patent: 2002/0118779 (2002-08-01), Wu et al.
patent: 2005/0101264 (2005-05-01), Farlow et al.
patent: 1020020090562 (2002-12-01), None
patent: 2003-008676 (2003-01-01), None
patent: 100451709 (2004-09-01), None
Bang Young-Jo
Kim Jun-Woo
Lee Yong-Su
Park Youn-Ok
Electronics and Telecommunications Research Institute
Hanaro Telecom, Inc.
KT Corporation
KT-Freetel Co., Ltd.
Phu Phuong
LandOfFree
Method for automatic gain control before initial... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for automatic gain control before initial..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for automatic gain control before initial... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4212530