Third , this dissertation focuses on the error analysis of digital method of the pulse compression signal generation based on lfm signals . except , the error model is established here . fourth , pre - distortion calibration technique is studied and applied to improve signal quality , meanwhile the software is developed 第三部分对宽带信号源模块系统性能进行了分析,给出了系统误差,介绍了各部分误差对系统性能的影响,并建立误差模型,为后面预失真技术提供理论基础。
The article firstly introduces the linearization techniques : predistortion technique and technique feedforward . it analyses the concept and causes of the nonlinear distortion , and consequently introduces the principle and implement of predistortion and feedforward , and puts forward the innovative project of self - adaptable predistortion and feedforward 分析研究了预失真技术和前馈技术的原理、性能及其实现方法，并在深入研究两种技术的基础上，提出了集合两者优点于一体的自适应前馈预失真线性化系统方案。
The nonlinear influence on multiple carriers signal , such as am / am and am / pm conversion , has been analyzed in this paper . some common linearization techniques , such as feedback , feed - forward and pre - distortion , have also been introduced and compared , which shows that feed - forward is the preferred linearization approach for application in this paper 本文分析了微波功率放大器的非线性特性，特别是am / am转换和am / pm转换对多载波信号的影响，也介绍了反馈、前馈、预失真等各种常用线性化技术的基本原理，并对它们的优缺点进行了比较总结。
The main studying of this dissertation is about cubic analog predistorer , digital predistortion linearizer based on look - up table ( lut ) technology and feedforward - predistortion linearization system . the original work and valuable results in this dissertation are as follows . 1 . a novel third - order distortion generator which can suppress the residual second - order intermodulation distortion ( imd2 ) is presented 本论文的研究分别涉及三阶模拟预失真系统、查找表预失真系统和前馈预失真系统，其中有创新和有价值的工作主要体现在以下三个方面： 1 ：对于采用二极管反向平行对的三阶模拟预失真系统，本文提出了一种可以抑制驻留二阶交调( imd2 )信号的新型三阶扰动器。
