QQ客服 官方微博 反馈留言

	基于正交模型辨识辅助的欠采样数字预失真方法; Under-sampling digital predistortion method based on auxiliary orthogonal model identification
	吴晓芳 ; 石江宏 ; 陈辉煌 ; 邓振淼
	2012
关键词	宽带通信系统 数字预失真 非线性系统辨识 正交模型 broad-band communication system digital predistortion nonlinear system identification orthogonal model
英文摘要	针对数字预失真技术在宽带通信系统中的具体实现受到模数转换器采样率制约的问题,提出一种新的欠采样数字预失真方法。首先在欠采样速率下对功放的正交模型进行离线辨识,接着根据一定的算法得到nyQuIST采样率下的简化预失真器模型,并进行在线的自适应直接学习。该方法具有预失真器模型构造简单、欠采样实现高效的特点。理论分析和仿真结果表明,该方法有效降低了对模数转换器的采样率要求,优化了简化预失真器模型的线性化条件,更好地抑制了功放非线性引起的带内失真和频谱再生。; In broad-band communication systems,the practical implementation of digital predistortion suffers from the sampling-rate limitation of analog-to-digital converters.In order to solve this problem,an under-sampling digital predistortion method is proposed.First,the power amplifier's orthogonal model parameters are extracted by offline identification with under-sampling rate.Second,the simplified predistorter with Nyquist rate is obtained according to a certain algorithm.Finally,an adaptive direct-learning algorithm is operated online.The proposed method has the characteristics of simple predistorter model structure and efficient under-sampling realization.Theoretical analysis and simulation results demonstrate that the method reduces the sampling-rate requirement of the analog-to-digital converter effectively and optimizes the linearization condition of the simplified predistorter model,thus it can greatly suppress the in-band distortion and spectrum regrowth caused by the nonlinearities of the power amplifier.; 国家自然科学基金(61102135);中央高校基本科研业务费专项资金(2010121063);福建省科技重大专项(2009HZ0003-1)资助课题
语种	zh_CN
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/122914]
专题	信息技术－已发表论文
推荐引用方式 GB/T 7714	吴晓芳,石江宏,陈辉煌,等. 基于正交模型辨识辅助的欠采样数字预失真方法, Under-sampling digital predistortion method based on auxiliary orthogonal model identification[J],2012.
APA	吴晓芳,石江宏,陈辉煌,&邓振淼.(2012).基于正交模型辨识辅助的欠采样数字预失真方法..
MLA	吴晓芳,et al."基于正交模型辨识辅助的欠采样数字预失真方法".(2012).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。