Pulse or digital communications – Receivers – Automatic gain control
Reexamination Certificate
2006-02-07
2010-10-26
Bayard, Emmanuel (Department: 2611)
Pulse or digital communications
Receivers
Automatic gain control
C375S316000
Reexamination Certificate
active
07822153
ABSTRACT:
An automatic gain control (AGC) apparatus of a wireless mobile terminal, and method, in an orthogonal frequency division multiple access (OFDMA) system. A gain amplifier controls an amplification gain of received analog symbols. An analog-to-digital converter converts the received analog symbols into a digital signal. A fast Fourier transform (FFT) unit converts the digital signal into a frequency-domain signal. A power measurer measures power in the frequency domain in units of sub-carriers. A sub-carrier power accumulator detects a sub-carrier carrying a signal, and accumulates its power value. A sub-carrier average power measurer estimates an average power value transmitted per sub-carrier from the accumulated power value. A control means compares the estimated average power value with a reference power value, and generates a control signal used for controlling a gain of the gain amplifier according to the comparison result.
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Gu Young-Mo
Kim Min-Goo
Song Yong-Chul
Bayard Emmanuel
Roylance Abrams Berdo & Goodman L.L.P.
Samsung Electronics Co,. Ltd.
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