An Adaptive Pre-distortion Method Based on Orthogonal Polynomials
Wideband signals without pre-distortion are distorted by memory and nonlinear effect of high power amplifier. To compensate these distortions, we propose an adaptive pre-distorter based on orthogonal polynomials. Based on orthogonal criterion, we derive a series of orthogonal polynomials under circular symmetric complex Gaussian distribution. Indirect learning architecture is used for pre-distorter identification and recursive least square algorithm is introduced for parameters estimation. At last using two power amplifier models, we simulate the performance of the proposed pre-distorter in an OFDM system. Simulation results show that the proposed pre-distorter can effectively compensate the distortions produced by high power amplifier.
Orthogonal Polynomials Pre-distortion Recursive Least Square Nonlinear Distortion
HE Huaming TANG Liang ZHANG Chunsheng YE Bin YU Kai BU Zhiyong
Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050
国际会议
The 31st Chinese Control Conference(第三十一届中国控制会议)
合肥
英文
5573-5576
2012-07-01（万方平台首次上网日期，不代表论文的发表时间）