Pulse or digital communications – Receivers – Automatic gain control
Reexamination Certificate
2006-06-20
2006-06-20
Vo, Don N. (Department: 2631)
Pulse or digital communications
Receivers
Automatic gain control
C455S234100, C455S240100, C455S245100, C455S251100
Reexamination Certificate
active
07065165
ABSTRACT:
Automatic gain control (AGC) methods and apparatus suitable for use in orthogonal frequency division multiplexing (OFDM) receivers are described. One AGC method includes the steps of repeatedly performing a first AGC process which adjusts amplifier gain based on determining that a signal level of multiple time sample values is outside a limit set by a first predefined threshold; and repeatedly performing a second AGC process which adjusts the amplifier gain based on determining that a signal level of multiple frequency sample values associated with a plurality of pilot tones is outside a limit set by a second predefined threshold. Preferably, the first AGC process is performed repeatedly at a first rate and the second AGC process is performed repeatedly at a second rate that is less than the first rate.
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Heinonen Jari M.
Hirano Michael R.
Zhang Hongliang
Cingular Wireless II LLC
Henry Coulter C.
Herndon, Esq. J. Perry
Parks Knowlton LLC
Vo Don N.
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