数字预失真系统对各种误差的敏感度分析  

Error sensitivity in digital predistortion system

作　　者：孔潇维[1,2] 夏威[1] 何子述[1] 

机构地区：[1]电子科技大学电子工程学院 [2]中国人民解放军95853部队

出　　处：《计算机应用研究》2013年第12期3674-3677,3681,共5页Application Research of Computers

基　　金：四川省科技支撑计划基金资助项目(2010GZ0149);粤港关键领域重点突破项目(200920523300005);中央高校基本科研业务费资助项目(ZYGX2010J020)

摘　　要：大多数数字预失真(DPD)系统都是在各种理想假设条件下进行的理论验证和算法仿真。在真实的硬件系统中由于受到各种误差分量的影响,仿真环境下所得的补偿效果与性能指标有时很难在实际系统中复现。针对DPD系统中常见的几种误差分量进行分析,根据其数字域体现建立基带误差模型及数字域DPD仿真系统。通过大量细致的仿真实验,归纳和分析了各种误差分量对DPD系统的影响,最终为硬件系统各主要部件设计指标的提出提供了依据并同时降低了后期系统调试的工作量。At present, most of digital predistortion （DPD） systems theory verification and algorithm simulation are based on ideal conditions. Simulation results under ideal conditions are difficult to reproduce in the real system due to the many error components exist in the system. This paper analyzed Several common errors in the DPD system and built the baseband error model according to the expression of error in digital domain. Through a mass of simulation data, the error sensitivity in DPD system was analyzed and concluded. Finally, it proposed the design specifications of main system components and reduced the workload of debug by the simulation.

关 键 词：数字预失真系统 量化误差 时延误差 频率误差 相位误差 归一化均方误差 相邻信道功率比 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]