Pulse or digital communications – Receivers – Automatic gain control
Reexamination Certificate
2002-04-18
2008-08-05
Ghayour, Mohammad (Department: 2611)
Pulse or digital communications
Receivers
Automatic gain control
C455S239100
Reexamination Certificate
active
07409018
ABSTRACT:
An automatic gain controller having an estimator to estimate the level of an input signal, a subtractor to calculate a difference between the level estimated by the estimator and a predetermined reference value, a gain controller to output a control value achieved by scaling non-linearly the difference output by the subtractor, an accumulator to accumulate the output of the gain controller, and a modulator to modulate the output of the accumulator to a pulse width modulated signal. The gain controller outputs the control value proportional to a square of the difference. If en error between the power of the input signal and the reference value is great, the power can be quickly adjusted to a desired signal level, and if the error is small, the gain can be controlled finely.
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Popken et al., “Statistical Description of Non-Coherent Automatic Gain Control”, IEEE Conference, Singapore ICCS/ISITA '92, ‘Communications on the Move’, Nov. 16-20, 1992, pp. 133-136 vol. 1.
Ghayour Mohammad
Panwalkar Vineeta
Samsung Electronics Co,. Ltd.
Staas & Halsey , LLP
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