DIGITAL ANALOG PREDISTORTION PROCESSING APPARATUS, SIGNAL TRANSMISSION SYSTEM AND SIGNAL TRANSMISSION METHOD

摘要

Disclosed are a digital analog predistortion processing apparatus, signal transmission system and signal transmission method, wherein the signal transmission system includes: a digital-to-analog converter, for performing the digital-to-analog conversion on a digital signal to be transmitted; a reconstruction filter, for filtering out the digital mirror of the signal output by the digital-to-analog converter after the digital-to-analog conversion, and outputting a low-frequency or an intermediate-frequency analog signal; an up-converter, for performing up-conversion on the low-frequency or intermediate-frequency analog signal output by the reconstruction filter, and outputting a radio frequency signal; a digital analog predistortion apparatus, for performing, on the basis of a predistortion factor, the analog predistortion processing on the radio frequency signal output by the up-converter, and outputting a predistortion radio frequency signal; an amplifier, for amplifying the predistortion radio frequency signal and outputting a distortionless radio frequency signal; and a radio frequency filter, for performing radio frequency filtering on the distortionless radio frequency signal and transferring it to an antenna for transmitting. With the solutions of the embodiments of the present invention, the high performance requirement of the signal predistortion processing for the components of the transmission system can be reduced, thus the device cost can be reduced.