功率放大器数字预失真技术的研究  

Study on digital predistortion technology for power amplifiers

作　　者：李昌元[1,2] 黄涛[1,2] 刘永飘[1,2] 陈东进[1,2] 

机构地区：[1]光纤通信技术和网络国家重点实验室,湖北武汉430074 [2]武汉虹信通信技术有限责任公司,湖北武汉430074

出　　处：《光通信研究》2010年第6期51-53,共3页Study on Optical Communications

摘　　要：在宽带码分多址(WCDMA)等宽带通信系统中,射频功率放大器呈现出严重的电记忆效应和热记忆效应,产生频谱再生和邻道干扰,传统的无记忆预失真技术已经无法消除信号失真而达到理想的线性化效果。针对此类有记忆性的功放,文章提出一种新的记忆多项式预失真器,以跟踪射频功率放大器特性的变化,并进行非线性补偿。In broadband communication systems,e.g.WCDMA,RF power amplifiers are subject to electric and thermal memory effects,resulting in spectral regrowth and adjacent channel interference,which cannot be cancelled by conventional memoryless predistortion technologies for the desired linearizing effects.For those memory power amplifiers,a novel memory polynomial predistortor is presented for those memory power amplifiers so as to track the variations of their characteristics and compensate the nonlinearity.

关 键 词：记忆效应 数字预失真 记忆多项式 递推最小二乘法 

分 类 号：TN722.7[电子电信—电路与系统]