Method and Device for Automatic Gain Control
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Abstract
A method and apparatus for adjusting the gain of an amplifier (202) in a communication receiver comprising: estimating the power of a time domain signal (307); estimating the power distribution on one or more sub-carriers of a frequency domain signal (309) transformed from the time domain signal; and generating a gain control signal for the amplifier based on the estimated power of the time domain signal and the power distribution on sub-carriers of the frequency domain signal (311).
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Citations
48 Claims
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1-25. -25. (canceled)
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26. A method of adjusting the gain of an amplifier in a communication receiver, comprising:
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estimating the power of a time domain signal; estimating the power distribution on one or more sub-carriers of a frequency domain signal transformed from the time domain signal; and generating a gain control signal for the amplifier based on the estimated power of the time domain signal and the power distribution on sub-carriers of the frequency domain signal. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A device for automatic gain control for an OFDM receiver, comprising:
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an amplifier operative to amplify a time domain signal using a gain control signal; a Fast Fourier Transform (FFT) for converting the time domain signal to a frequency domain signal; and an automatic gain control unit adapted to; estimate the power of the time domain signal; estimate the power distribution on one or more sub-carriers of the frequency domain signal; and generate the gain control signal for the amplifier based on the estimated power of the time domain signal and the power distribution on sub-carriers of the frequency domain signal. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45)
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46. A mobile radio communication device operative in an OFDM system, comprising:
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an amplifier operative to amplify a time domain signal using a gain control signal; a Fast Fourier Transform (FFT) for converting the time domain signal to a frequency domain signal; and an automatic gain control unit adapted to; estimate the power of the time domain signal; estimate the power distribution on one or more sub-carriers of the frequency domain signal; and generate the gain control signal for the amplifier based on the estimated power of the time domain signal and the power distribution on sub-carriers of the frequency domain signal. - View Dependent Claims (47)
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48. A machine readable medium including program instructions operative to cause a computing apparatus to perform the process of:
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estimating the power of a time domain signal; estimating the power distribution on sub-carriers of a frequency domain signal transformed from the time domain signal; and generating a gain control signal for an amplifier based on the estimated power of the time domain signal and the power distribution on sub-carriers of the frequency domain signal.
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Specification