US 12,088,269 B2
Method, device, and storage medium for hybrid automatic gain control in communication system
Xingyu Xiang, Germantown, MD (US); Dan Shen, Germantown, MD (US); Genshe Chen, Germantown, MD (US); and Khanh Pham, Kirtland AFB, NM (US)
Assigned to Intelligent Fusion Technology, Inc., Germantown, MD (US)
Filed by Intelligent Fusion Technology, Inc., Germantown, MD (US)
Filed on Jul. 22, 2021, as Appl. No. 17/382,838.
Claims priority of provisional application 63/085,826, filed on Sep. 30, 2020.
Claims priority of provisional application 63/055,092, filed on Jul. 22, 2020.
Prior Publication US 2022/0029594 A1, Jan. 27, 2022
Int. Cl. H03G 3/30 (2006.01); H03F 3/21 (2006.01)
CPC H03G 3/3089 (2013.01) [H03F 3/21 (2013.01); H03G 2201/103 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A hybrid automatic gain control (AGC) method, comprising:
amplifying, by a variable gain amplifier, an input signal received from a transmitter to generate an amplified signal, and converting, by one or more analog-to-digital converters, the amplified signal into a plurality of output signals;
estimating, by an average amplitude estimator, a moving-average amplitude of output signals of a currently-received input signal; and calculating, by a signal amplitude difference calculator, a signal amplitude difference according to the moving-average amplitude of the plurality of output signals of the currently-received input signal and a desired output signal amplitude level;
calculating, by a normalized signal amplitude ratio calculator, a signal amplitude ratio according to output signals of two previous output signal blocks and AGC gains corresponding to the output signals of the two previous output signal blocks, wherein the two previous output signal blocks correspond to two previous consecutive input signals next to the currently-received input signal;
obtaining a step size according to the signal amplitude difference and the signal amplitude ratio; and
calculating an AGC gain of the currently-received input signal according to the step size and an AGC gain of a previous input signal adjacent to the currently-received input signal.