Abstract: This application provides example methods for controlling an output power of an antenna for user equipment. One example method includes, during a sounding reference signal (SRS) transmission period, transmitting, by a first antenna of at least one antenna of the user equipment, a first SRS signal to a base station at a first SRS output power, where the first SRS output power is equal to a maximum output power (Pcmax) of the first antenna. During the SRS period, a non-SRS signal is transmitted to the base station at a non-SRS output power, where the non-SRS output power is less than a difference between the maximum output power of the first antenna and a maximum output power reduction of the first antenna, and the maximum output power reduction of the first antenna is set to meet an electromagnetic power density exposure requirement of the first antenna.

Abstract: A transmit power adjustment method and apparatus, where a current status information combination is obtained, and restricted power of each transmit source of the at least two transmit sources in the current status information combination is obtained, where under a precondition that radiation generated by the mobile terminal does not exceed a standard specific absorption rate (SAR) value, the restricted power of each transmit source of the at least two transmit sources is a maximum permitted transmit power of each transmit source such that maximum transmit power of each transmit source is separately adjusted to the restricted power of each transmit source of the at least two transmit sources in the current status information combination.