Power adjustment method and apparatus

1. A power adjustment method, comprising:

obtaining a to-be-output signal;

performing first automatic gain control (AGC) processing on the to-be-output signal to obtain the to-be-output signal on which the first AGC processing is performed, and to obtain a gain value of the to-be-output signal;

performing digital pre-distortion (DPD) processing on the to-be-output signal on which the first AGC processing is performed, to obtain the to-be-output signal on which the DPD processing is performed;

calculating an output power back-off (OBO) value based on the gain value;

adjusting, based on the OBO value, output power of the to-be-output signal on which the DPD processing is performed; and

sending, to a signal receive end, the to-be-output signal on which the output power adjustment is performed.

2. The method according to claim 1 , wherein after performing DPD processing on the to-be-output signal on which the first AGC processing is performed, the method further comprises:

performing second AGC processing on the to-be-output signal on which the DPD processing is performed.

3. The method according to claim 1 , wherein adjusting, based on the OBO value, the output power of the to-be-output signal on which the DPD processing is performed comprises:

adjusting, based on the OBO value and a preset amplification factor, the output power of the to-be-output signal on which the DPD processing is performed.

4. The method according to claim 3 , wherein adjusting, based on the OBO value and the preset amplification factor, the output power of the to-be-output signal on which the DPD processing is performed comprises:

adjusting the output power to a first value, wherein the first value is obtained by subtracting the OBO value from a product of the output power and the preset amplification factor.

5. The method according to claim 4 , wherein adjusting the output power to the first value comprises:

adjusting the output power to the first value if the product of the output power and the preset amplification factor is greater than a first threshold.

6. The method according to claim 3 , wherein adjusting, based on the OBO value and the preset amplification factor, the output power of the to-be-output signal on which the DPD processing is performed further comprises:

adjusting, based on the OBO value, the preset amplification factor, and an adjustment amount that is fed back by the signal receive end, the output power of the to-be-output signal on which the DPD processing is performed.

7. The method according to claim 6 , wherein adjusting, based on the OBO value, the preset amplification factor, and the adjustment amount that is fed back by the signal receive end, the output power of the to-be-output signal on which the DPD processing is performed comprises:

adjusting the output power to a second value, wherein the second value is obtained by subtracting the OBO value from a third value, and the third value is obtained by adding the adjustment amount to a product of the output power before adjustment and the preset amplification factor.

8. The method according to claim 7 , wherein adjusting the output power to the second value comprises:

adjusting the output power to the second value if the third value is greater than a first threshold.

9. The method according to claim 5 wherein the first threshold is maximum power used

in response to the to-be-output signal on which the DPD processing is performed is sent at lowest traffic.

10. The method according to claim 1 , wherein the OBO value is calculated using: C=10*lg(1/G{circumflex over ( )}2), where C is the OBO value, and G is the gain value.

11. The method according to claim 1 , wherein before obtaining the to-be-output signal, the method further comprises:

obtaining a common public radio interface (CPRI) data flow, wherein the CPRI data flow comprises an in-phase and quadrature (I/Q) signal and a control word (CW) signal;

separating the I/Q signal and the CW signal that are in the CPRI data flow to obtain a separated I/Q signal and a separated CW signal;

encoding and mapping the separated CW signal to obtain a mapped signal;

performing compression and filtering on the separated I/Q signal to obtain a compressed and filtered I/Q signal; and

combining the mapped signal with the compressed and filtered I/Q signal to obtain the to-be-output signal.

12. A power adjustment apparatus, comprising:

at least one processor;

a non-transitory computer-readable storage medium coupled to the at least one processor and storing programming instructions for execution by the at least one processor, wherein the programming instructions instruct the at least one processor to cause:

a first automatic gain control (AGC) amplifier to:

obtain a to-be-output signal; and

perform first AGC processing on the to-be-output signal to obtain the to-be-output signal on which the first AGC processing is performed, and to obtain a gain value of the to-be-output signal;

a digital pre-distortion (DPD) calculator to perform DPD processing on the to-be-output signal that passes the first AGC amplifier to obtain the to-be-output signal on which the DPD processing is performed;

an output power back-off (OBO) value calculator to calculate an OBO value based on the gain value obtained by the first AGC amplifier; and

a power amplifier to adjust, based on the OBO value obtained by the OBO value calculator, output power of the to-be-output signal that passes the DPD calculator; and

send, to a signal receive end, the to-be-output signal on which the output power adjustment is performed.

13. The apparatus according to claim 12 , wherein the programming instructions further instruct the at least one processor to cause:

a second AGC amplifier to perform second AGC processing on the to-be-output signal that passes the DPD calculator.

14. The apparatus according to claim 12 , wherein the programming instructions further instruct the at least one processor to:

adjust, based on the OBO value obtained by the OBO value calculator and a preset amplification factor, the output power of the to-be-output signal that passes the DPD calculator.

15. The apparatus according to claim 14 , wherein the programming instructions further instruct the at least one processor to:

adjust the output power to a first value, wherein the first value is obtained by subtracting the OBO value from a product of the output power and the preset amplification factor.

16. The apparatus according to claim 15 , wherein the programming instructions further instruct the at least one processor to:

adjust the output power to the first value if the product of the output power and the preset amplification factor is greater than a first threshold.

17. The apparatus according to claim 14 , wherein the programming instructions further instruct the at least one processor to:

adjust, based on the OBO value, the preset amplification factor, and an adjustment amount that is fed back by the signal receive end, the output power of the to-be-output signal that passes the DPD calculator.

18. The apparatus according to claim 17 , wherein the programming instructions further instruct the at least one processor to:

adjust the output power to a second value, wherein the second value is obtained by subtracting the OBO value from a third value, and the third value is obtained by adding the adjustment amount to a product of the output power before adjustment and the preset amplification factor.

19. The apparatus according to claim 18 , wherein the programming instructions further instruct the at least one processor to:

adjust the output power to the second value if the third value is greater than a first threshold.

20. A non-transitory, computer-readable storage medium storing one or more instructions executable by a computer system to perform operations comprising:

obtaining a to-be-output signal;

performing first automatic gain control (AGC) processing on the to-be-output signal to obtain the to-be-output signal on which the first AGC processing is performed, and to obtain a gain value of the to-be-output signal;

performing digital pre-distortion (DPD) processing on the to-be-output signal on which the first AGC processing is performed, to obtain the to-be-output signal on which the DPD processing is performed;

calculating an output power back-off (OBO) value based on the gain value;

adjusting, based on the OBO value, output power of the to-be-output signal on which the DPD processing is performed; and

sending, to a signal receive end, the to-be-output signal on which the output power adjustment is performed.