OFDM系统中的一种自适应预失真器

来源 :电波科学学报 | 被引量 : 0次 | 上传用户:bin930640
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
对OFDM传输系统中大功率放大器非线性失真的数字自适应预失真技术进行了研究。利用有理双线性函数的非线性能较好地逼近大功率放大器的AM AM或AM PM非线性特性及其逆变换易于求解的特性 ,提出了一种新的数字自适应预失真方法 ,它是对估计器的输入幅度进行均匀量化 ,用一个估计器对大功率放大器的非线性特性进行估计 ,通过训练估计器的参数去调节预失真器的非线性参数 ,以达到预失真补偿的目的。与以前的方法比较 ,该方法用于正交频分复用 (OFDM )系统中具有收敛速度快、系统性能稳定、补偿效果好等特点 The digital adaptive predistortion technique of nonlinear distortion of high power amplifier in OFDM transmission system is studied. Using the nonlinear performance of rational bilinear function to approximate the AM AM or AM PM non-linearity characteristics of high-power amplifier and its easy to solve inverse transform, a new digital adaptive predistortion method is proposed The input amplitude of the estimator is uniformly quantized. An estimator is used to estimate the nonlinear characteristics of the high power amplifier. The parameters of the training estimator are used to adjust the nonlinear parameters of the predistorter so as to achieve the purpose of pre-distortion compensation. Compared with the previous methods, the proposed method is suitable for orthogonal frequency division multiplexing (OFDM) system with the characteristics of fast convergence, stable system performance and good compensation effect
其他文献
A theoretical model about the secondary deformation is developed by the combination of analytical and experimental approaches. A system simulation based on the
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥
The effect of reagents used in separating chalcopyrite from pyrite on the cake moisture of the copper concentrate at Daye Iron Mine Mineral Processing Plant was
苯磺酸左旋氨氯地平是一类重要的抗高血压药物,能通过降低血压,改善血管内皮功能、调节血压昼夜节律,从而减少心、脑、肾等重要脏器损害,以降低心脑血管事件的发生率.苯磺酸
A new theropod dinosaur,Shidaisaurusjinae gen.et sp.nov.,has been described on the basis of an incomplete skeleton.The specimen was found near the base of the U
研究了单个供应商和单个零售商组成的供应链中,在需求不确定的情况下,零售商采用收益共享机制对供应链的影响.采用Stackelberg博弈模型分析得到了零售商和供应商的最优决策,
死刑作为对犯罪分子最严厉的处罚,在我国的刑罚中一直处于独特的地位。但我国死刑制度罪名过多,涉及面过宽,已经不符合社会发展的需要。根据我国当前发展的实际情况,刑法修正
党的十八届三中全会《决定》进一步明确了坚持立德树人的有关要求,建平县各个高中要认真学习贯彻,以全面深化基础教育课程改革为切入点,将立德树人根本任务落到实处。 The
The Shapley value of fuzzy bi-cooperative game is developed based on the conventional Shapley value of bi-cooperative game.From the viewpoint that the players c
通过参加中国科协组织的英国考察培训,介绍了英国科技期刊开放存取模式的经验。经过比较分析,提出其对中国科技期刊实现开放存取的几点启示。 By participating in the Brit