应用于智能天线阵列的数字基带预失真方案设计-易迪拓培训.PDF

应用于智能天线阵列的数字基带预失真方案设计 1 1 2 胡泽鑫 马陆 梁旭文 1 2 （中科院上海微系统与信息技术研究所，上海 200050 ） （中科院上海微小卫星工程中心，上海 200050 ） huzexin18@163.com e_wqs@ 摘 要：数字基带预失真Digital base-band Predistortion (DPD)技术是克服智能天线阵列中由于功放非线性失真而带来的幅相误差的 有效方法之一。本文设计了一种基于二维查找表的基带预失真方案。给出了记忆效应消除算法、自适应算法、环路延迟估计算法和 失真判定算法。仿真结果表明，该方案能够有效减小带内失真，抑制带外频谱扩散，实现有记忆非线性功放的自适应预失真。 关键词：智能天线 幅相误差 数字基带预失真 线性化技术 查找表 A Digital Base-band Predistorter Design For Smart Antenna Arrays 1 1 2 Hu Zexin , Ma lu ,Liang Xuwen （Shanghai Institute of Microsystem and Information Technology, Shanghai 200050）1 （ 2 Shanghai Engineering Center for Microsatellites, Shanghai 200050） Abstract: Digital base-band Predistortion(DPD) is a efficient way to resolve the Amplitude and Phase Error of the smart antenna design, which is caused by the the nonlinear distortion of the power amplifier .In this paper ,a DPD scheme based on two-dimensional Look-Up-Table(LUT) is investigated ，which includes memory effects compensating strategy, adaptive algorithm, novel loop delay estimation method and distortion judging algorithm. The simulation results show that the proposed predistorter can correct the signal distortion effectively by reducing in-band distortion and suppressing spectrum extension for HPA with memory. Keywords: Smart antenna; Amplitude and Phase Error; Linearization Technique; Look-Up-Table(LUT) 效途径。 1 引言 智能天线主要由阵列天线、射频收发组件和数字 近年来随着蜂窝移动通信的迅速发展，用户量大