Digital Predistortion Algorithm Suitable for Hardware Implementation

Since most algorithms for predistortion are too complex to implement,this paper designs an efficient algorithm of digital predistortion suitable for implementation with two 32×16 Look Up Table(LUT) as the predistortion block,considering the loop delay of the analog/RF circuits and the phase rotation.Coefficients used to predistort input signal are stored in LUT in order to compensate for distortion of Power Amplifiers(PA).With 64-QAM OFDM signal,result shows that this method can improve Adjacent Channel Power Ratio(ACPR).