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

Patent metadata

Field	Value
Publication number	US-12088269-B2
Application number	US-202117382838-A
Country	US
Kind code	B2
Filing date	Jul 22, 2021
Priority date	Jul 22, 2020
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

Embodiments of the present disclosure provide a method, a device, and a storage medium for hybrid automatic gain control in a communication system. The method includes amplifying an input signal to generate an amplified signal which is converted into a plurality of output signals; obtaining a moving average amplitude of a plurality of output signals of a current input signal; and calculating a signal amplitude difference according to the moving average amplitude and a desired output signal amplitude level; calculating a signal amplitude ratio according to a plurality of output signals of two previous output signal blocks and AGC gains corresponding to the plurality of output signals of the two previous output signal blocks; obtaining a step size according to the signal amplitude difference and the signal amplitude ratio; and calculating an AGC gain of the current input signal according to the step size and a corresponding previous AGC gain.

First claim

What is claimed is:

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.

2. The method according to claim 1 , wherein the signal amplitude difference is expressed by:
A e =A n −A d
wherein A e denotes the signal amplitude difference, A n denotes the moving-average amplitude and A d denotes the desired output signal amplitude level.

3. The method according to claim 2 , wherein the signal amplitude ratio is expressed by:

S
p

=

∑

i
=
1

β

⁢



y
^

n
-
β
-
i

G

n
-
β
-
i



/

∑

i
=
1

β

⁢



y
^

n
-
i

G

n
-
i



wherein S p denotes the signal amplitude ratio, ŷ denotes an output signal, G denotes an AGC gain, n denotes a signal index, β denotes a size of an output signal block, and i denotes an index within the output signal block.

4. The method according to claim 3 , wherein the step size is expressed by:

S
a

=

A
e

1
+

e

-



λ
⁢

⁢

S
P



wherein S a denotes the step size, and λ denotes a scale factor.

5. The method according to claim 3 , wherein:
the size of the output signal block is an integral multiple of a quantity of the plurality of output signals of the currently-received input signal.

6. 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.

7. The device according to claim 6 , wherein the signal amplitude difference is expressed by:
A e =A n −A d
wherein A e denotes the signal amplitude difference, A n denotes the moving-average amplitude and A d denotes the desired output signal amplitude level.

8. The device according to claim 7 , wherein the signal amplitude ratio is expressed by:

S
p

=

∑

i
=
1

Assignees

• Intelligent Fusion Tech Inc

Inventors

• Xiang Xingyu
• Shen Dan
• Chen Genshe
• Pham Khanh

Classifications

• H03G2201/103

  being an amplifying element · CPC title

• H03F3/21

  with semiconductor devices only {(H03F3/245 takes precedence)} · CPC title

• H04L27/3809

  Amplitude regulation arrangements · CPC title

• H04B1/1027

  assessing signal quality or detecting noise/interference for the received signal · CPC title

• H03G2201/706

  being quality indicator, e.g. BER,C/I · CPC title