Method, device, and storage medium for hybrid automatic gain control in communication system

A hybrid automatic gain control (AGC) device, comprising:

• a memory, configured to store program instructions for performing a hybrid automatic gain control method;
• and
• a processor, coupled with the memory and, when executing the program instructions, configured for:
• 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 a plurality 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.

A non-transitory computer-readable storage medium, containing program instructions for, when being executed by a processor, performing a hybrid automatic gain control (AGC) method, the 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.