METHOD AND RF MODULE FOR STABILIZING AND MAXIMIZING OUTPUT OF RADIO COMMUNICATION TRANSMITTING END OF RF BAND AND FOR CORRECTING NONLINEAR DISTORTION

摘要

PURPOSE: A method and an RF(Radio Frequency) module for stabilizing and maximizing the output of a radio communication transmitting end of RF band and for correcting nonlinear distortion is provided to improve the characteristic of the output by stabilizing and maximizing the characteristic of a nonlinear component by using an adaptive principle. CONSTITUTION: An attenuator(8) attenuates the signal from an antenna(16), and transmits to a mixer(9). The mixer(9) multiplies the attenuated signal by a carrier frequency to obtain the signal of original size. The second low pass filter(10) filers the output signal from the mixer(9) to transmit to an A/D(Analog/Digital) converter(11). The A/D converter(11) converts the filtered signal, and transmits the feed back signal to a digital signal processor(12). The digital signal processor(12) receives the original signal and the feed back signal, analyzes a difference in frequency domain, and controls the filter coefficient to minimize the difference. The first D/A converter(13) converts an analog control signal from the digital signal processor(12) and transmits to the first low pass filter(3). Each the second and third D/A converters(14,15) converts an analog control signal from the digital signal processor(12) and transmits to the first low pass filter(3) respectively.