Patent ID: 8433268

Claim:
An apparatus for controlling gain according to a magnitude change of an output signal in a polar transmitter, the apparatus comprising: a signal generating unit configured to receive and modulate a transmission signal, separate the modulated signal into a phase signal and a magnitude signal, generate a pulse signal by using the magnitude signal, and convert the phase signal into a wireless signal; a gain correcting unit configured to extract a transmission gain from magnitude information of a resource block of the transmission signal, provide a gain value to the signal generating unit, and generate an envelope signal for a power amplification by using the pulse signal of the signal generating unit; a power amplifying module configured to receive the envelope signal, and perform a power amplification or a simple amplification according to a selection signal and the envelope signal; and a gain controlling unit configured to determine a magnitude of a signal generated by the signal generating unit by using a power control signal for the transmission signal, determine a gain mode, and output the selection signal.