中文摘要：

功放是无线通信发射机的重要组成部分，随着无线通信的不断发展，对宽带线性功放的要求也越来越高。然而，功放的非线性特性和记忆效应会导致信号严重失真。为了减小带内失真和邻道干扰，数字预失真成为功放线性化技术中最有发展潜力的技术。介绍了功放模型，数字预失真的学习结构、数字预失真器参数的辨识算法等研究现状，探讨了数字预失真的发展趋势，为今后数字预失真技术的研究提供参考。

英文摘要：

AS power amplifier is an important part of wireless communication transmitter, and with the sus- tainable development of wireless communication, the demand for broadband linear amplifier becomes in- creasingly high. However, nonlinear characteristic and memory effect of power amplifier would inevitably lead to serious distortion of the signal. For reduction of in-band distortion and ACI （ Adjacent Channel In- terference）, digital predistortion becomes the most potential development technology in power amplifier lin- earization technology. The status of current amplifier model, learning structure and identification algorithms of digital predistortion parameter are discussed, and the development trend of digital predistortion is ex- plored, and all these could serve as a reference for future digital predistortion research.