Abstract: A wireless transmission method includes obtaining an MCS (modulation and coding scheme) rate and a power amplifier gain of each station in a set of stations for a multi-user (MU) transmission, generating a maximum available MCS rate according to a plurality of MCS rates of the set of stations, selecting a power amplifier gain of the MU transmission according to the maximum available MCS rate, adjusting a digital gain of each station according to the power amplifier gain of the MU transmission and the power amplifier gain of each station, adjusting a frequency domain signal of each station according to the digital gain thereof, converting a plurality of adjusted frequency domain signals of the set of stations into a time domain signal, and generating an amplified signal for the MU transmission according to the power amplifier gain of the MU transmission and the time-domain signal.