The Research and Implementation of Digital Pre-distortion On WCDMA Repeater

现代社会对各种无线通信业务的需求迅猛增长，这就要求无线通信在具有较高传输质量的同时，还必须具有较大的传输容量。这种需求要求在无线通信中必须采用效率较高的线性调制方式，以提高有限频带带宽的数据速率和频谱利用率，而效率较高的调制方式通常会对发端发射机的线性要求较高，这就使功率放大器线性化技术成为下一代无线通信系统的关键技术之一。 在本文中，研究了前人所提出的各种功放线性化技术，如功率回退法、正负反馈法、预失真和非线性器件法等等，针对功率放大器对信号的失真放大问题进行研究，对比和研究了目前广泛流行的自适应数字预失真算法。在一般的自适应数字预失真算法中，主要有两类：无记忆非线性预失真和有记忆非线性预...In modern society, the increasing demand for wireless communication services requires not only better transmission quality, but also larger transmission capacity. As a result, more efficient linear modulation methods have to be applied in the wireless communication to improve the data rate and spectrum utilization in the limited bandwidth band situation. However, more efficient modulation accordin...学位：工学硕士院系专业：信息科学与技术学院通信工程系_通信与信息系统学号：2005130241

基于查找表的功放数字预失真方法

对功率放大器的失真原理进行了数学分析,描述了三阶,五阶互调的产生机理。介绍了基于查找表的数字预失真的两种算法,并对算法进行了仿真,分析了算法的有效性

Ana lysis and Design of the Photon ic-Band-GapM icrostr ip Antenna

[摘要] 采用时域有限差分法分析计算了光子隙微带天线的S 参数, 发现了光子带隙微带结构具有明 显的禁带特性, 然后利用仿真软件讨论这种结构天线参数的变化与对其禁带特性的关系. 最后归纳了这种 天线的基本设计原则和这种光子带隙微带天线的优点.Abstract: The Sparameter of PBG antenna was analyzed and calculated with the Finite-Difference Time- Domain method. It showed that the structure of PBGmicrostrip antenna had obvious forbidden2band characteristic. The influence of the variety of the antenna structure parameters on the forbidden-band characterwas discussed by software simulating. The methods of designing this kind of antenna were discussed. At last, by analyzing the data, some excellent p roperties of the PBG microstrip antenna had been elicited.福建省自然科学基金资助项目(A0510001