Electronic device for performing power control

Patent metadata

Field	Value
Publication number	US-11246106-B2
Application number	US-201917048480-A
Country	US
Kind code	B2
Filing date	Jan 11, 2019
Priority date	Apr 26, 2018
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

An electronic device according to the present invention comprises: a first power amplifier for amplifying a first signal to a first power value in a first frequency band of a first communication system; and a second power amplifier for amplifying a second signal to a second power value in a second frequency band of a second communication system. The electronic device may comprise a baseband processor for: when the first and the second signal are transmitted at the same time, determining whether an average value of power values fed back from the first and the second power amplifier for a regular time interval exceeds a threshold value; and when the average value exceeds the threshold value, decreasing a gain of at least one of the first and the second power amplifier at regular time intervals.

First claim

The invention claimed is:

1. An electronic device, comprising:
a first power amplifier for amplifying a first signal to a first power value in a first frequency band of a first communication system;
a second power amplifier for amplifying a second signal to a second power value in a second frequency band of a second communication system; and
a baseband processor for determining whether an average value of power values fed back from the first power amplifier for a predetermined time section exceeds a threshold value when the first signal and the second signal are transmitted at the same time, and decreasing a gain of at least one of the first power amplifier or the second power amplifier at predetermined time intervals when the average value exceeds the threshold value,
wherein the baseband processor controls a transceiver circuit to reduce the gain of the second power amplifier of a 5G communication system so as a sum of the first power value and the second power value to be equal to or less than a maximum allowable power value when the sum of the first power value and the second power value requested from the first communication system and the second communication system exceeds the maximum allowable power value.

2. The electronic device of claim 1 , wherein the baseband processor determines an output power value of the second power amplifier based on an upper bound of the threshold value when the average value is greater than or equal to a lower bound of the threshold value for each power section for the first power value.

3. The electronic device of claim 1 , wherein the baseband processor controls the transceiver circuit so that the first power value and the second power value are scaled to be reduced in a same ratio when the sum of the first power value and the second power value exceeds the maximum allowable power value and a difference between the first power value and the second power value is less than or equal to a specific value, and controls the transceiver circuit so that the first power value is scaled to be increased to the maximum allowable power value in a time section where a packet transmission through the second communication system is not performed.

4. The electronic device of claim 3 , wherein the transceiver circuit reduces a gain of a driving amplifier at a rear stage of the second power amplifier when the gain of the second power amplifier of the 5G communication system is greater than or equal to a first gain value.

5. The electronic device of claim 4 , wherein the transceiver circuit reduces an input power inputted to the driving amplifier when the gain of the driving amplifier is greater than or equal to a second gain value.

6. The electronic device of claim 1 , wherein the baseband processor reduces the first power value and the second power value in a same ratio to limit a total power value to be less than or equal to a maximum allowable power value, and controls the first power value to be increased to the maximum allowable power value when transmitting a first signal only to a first base station of the first communication system.

7. The electronic device of claim 6 , wherein the baseband processor controls the second power value to be increased to the maximum allowable power value when transmitting a second signal only to a second base station of the second communication system.

8. The electronic device of claim 7 , wherein the baseband processor controls the transceiver circuit so that the first power value and the second power value are scaled to be reduced in a ratio of a corresponding power value when transmitting the first signal to the first base station while transmitting the second signal.

9. The electronic device of claim 1 , wherein the transceiver circuit comprises:
a first transceiver circuit operating in the first communication system; and
a second transceiver circuit operating in the second communication system,
wherein the first transceiver circuit measures the first power value for a predetermined time section through a feedback reception path, and
wherein the baseband processor receives information on the measured first power value from the first transceiver circuit, and transfers information on the second power value to the second transceiver circuit.

10. The electronic device of claim 9 , wherein the baseband processor allows the first power value according to the fed back average value to be less than or equal to the threshold value to determine the second power value such that a sum of the first power value and the second power value according to the fed back average value is less than or equal to a second threshold value.

11. The electronic device of claim 10 , wherein the baseband processor comprises a second baseband processor that performs power control for the second communication system, and
wherein the second baseband processor adjusts the gain of the second power amplifier based on the determined second power value.

12. The electronic device of claim 11 , wherein the second baseband processor controls a gain of a driving amplifier included in the second transceiver circuit and a gain of an IQ amplifier at a rear stage of a digital pre-distortion (DPD) portion included in the second transceiver circuit to be increased when an input power corresponding to the determined second power value is greater than or equal to a specific value.

13. An electronic device, comprising:
a first power amplifier for amplifying a first signal to a first power value in a first frequency band of a first communication system;
a second power amplifier for amplifying a second signal to a second power value in a second frequency band of a second communication system;
a coupler connected to the first power amplifier and configured to detect the first power value; and
a baseband processor for determining whether a sum of the first power value and the second power value exceeds a second threshold value based on an average value of power values fed back from the first power amplifier for a predetermined time section when the first signal and the second signal are transmitted at the same time, and decreasing a gain of at least one of the first power amplifier or the second power amplifier at predetermined time intervals when the sum of the first power value and the second power value exceeds the second threshold value.

14. The electronic device of claim 13 , comprising:
a first transceiver circuit operating in the first communication system; and
a second transceiver circuit operating in the second communication system,
wherein the first transceiver circuit measures the first power value for a predetermined time section through a feedback reception path, and
wherein the baseband processor receives information on the measured first power value from the first transceiver circuit, and transfers information on the second power value to the second transceiver circuit.

15. The electronic device of claim 13 , wherein the baseband processor allows the first power value according to the fed back average value to be less than or equal to the threshold value to determine the second power value such that a sum of the first power value and the second power value according to the fed back average value is less than or equal to the threshold value.

16. The electronic device of claim 15 , wherein the baseband processor comprises a second baseband processor that performs power control for the second communication system, and
wherein the second baseband processor adjusts the gain of the second power amplifier based on the determined second power value.

17.

Assignees

• Lg Electronics Inc

Inventors

• Cho Eunbit
• Kim Inkyung
• Kang Younghee

Classifications

• H04W52/52 Primary

  using AGC [Automatic Gain Control] circuits or amplifiers · CPC title

• H04W52/50

  at the moment of starting communication in a multiple access environment · CPC title

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title

• H04W52/367 Primary

  Power values between minimum and maximum limits, e.g. dynamic range · CPC title

• H04W52/30

  using constraints in the total amount of available transmission power · CPC title