Patent ID: 8660221
Filing Date: 2014-02-25
Classification: H03G

Abstract:
1. A fast and robust automatic gain control (AGC) apparatus, comprising: a power detector, electrically connected to a first analog-to-digital converter and a second analog-to-digital converter, used for providing a plurality of measured power (P a statistics-aided AGC algorithm unit, electrically connected to the first analog-to-digital converter, the second analog-to-digital converter and the power detector, used for determining an additional AGC gain adjustment (Δ a subtractor, electrically connected to the power detector, used for evaluating a power differences between a desired received signal power (P an average unit, electrically connected to the subtractor, used for averaging the plurality of AGC power error signals and providing an average AGC power error signal; an adder, electrically connected to the average unit and the statistics-aided AGC algorithm unit, used for providing a gain adjustment by adding the additional AGC gain adjustment (Δ a multiplier, electrically connected to the adder, used for controlling a AGC loop gain by an adjustable gain (k); an accumulator, electrically connected to the multiplier, used for tracking a plurality of average AGC power error, adding the plurality of average AGC power error signals up, storing and providing an appropriate digital gain value (G a LNA and VGA control mapping unit, electrically connected to the accumulator, used for converting the appropriate digital gain value (G