Calibration method for uplink sending power and associated equipment and system thereof

The invention discloses a calibration method for uplink sending power and associated equipment and system of the calibration method. The calibration method for the uplink sending power comprises the steps of receiving a power calibration frame sent by an access point, wherein the power calibration frame comprises a target receiving power and a current sending power; adjusting the uplink sending power according to the target receiving power and the current sending power, so that the receiving power, on different subcarriers or sub channels, of the access point is in a preset difference value range. According to the calibration method for the uplink sending power, the problem that it is difficult to normally receive all the uplink data when the difference between the received uplink sending powers of different stations is large in an uplink OFDMA communication process can be solved, and the problem that inter-user interference is large when the difference between the received uplink sending powers of different stations in an uplink MU-MIMO system is quite large can be solved.