METHOD AND APPARATUS FOR COMPENSATING DISTORTION SIGNALS IN COMMUNICATION SYSTEM

摘要

PURPOSE: An apparatus for compensating distortion signals in a communication system is provided to apply an adaptive feedback for reducing control elements and to make sizes of output signals constant according to sizes of input signals, so as to decrease amplitude distortion of signals outputted from an RF HPA(High Power Amplifier). CONSTITUTION: A power divider(51) divides inputted signals to two paths. A signal of the first path is inputted to a main amplifier(52). The main amplifier(52) amplifies the signal to output the amplified signal. Portions of the amplified signal are fed back to an M(Main) port of the fast amplitude controller(54) via an attenuator(56) by a directional coupler(55). A signal of the second path is inputted to an R(Reference) port via a delay line. The length of the delay line is same as delay time T. The two signals which arrive in the R port and the M port are compared to each other, and used to control a bias voltage of the main amplifier(52).