基于记忆多项式的射频功放模型研究  

Memory Polynomial Based RF Power Amplifier Models

作　　者：吴樟强[1] 刘太君[1] 任坤胜[1] 曾兴斌[1] 叶焱[1] 

机构地区：[1]宁波大学通信技术研究所,浙江宁波315211

出　　处：《宁波大学学报（理工版）》2008年第3期293-296,共4页Journal of Ningbo University：Natural Science and Engineering Edition

基　　金：国家自然科学基金(60771066);浙江省自然科学基金(Y106367);宁波市自然科学基金(2007A610006)

摘　　要：宽带射频功率放大器会呈现出严重的电记忆效应,为了表征此种动态非线性行为特性,研究记忆多项式射频功放模型并采用查找表来实现,从而可解决记忆多项式模型的数值不稳定性问题.详细讨论了记忆多项式模型结构及其如何采用查找表来实现,并采用单载波WCDMA信号和工作于1930～1990MHz频率范围的60W推挽型砷化镓场效应管(FLL600IQ-2)放大器来验证这种新方法的有效性.验证结果表明:基于查找表实现的记忆多项式射频功放模型能较好地表征宽带射频功率放大器的动态非线性行为特性。Serious electric memory effect exists in Wideband RF power amplifier. To characterize this nonlinear dynamic behavior, the author has studied the model of memory polynomial RF power amplifier and adopted the look-up table （LUT） for its implementation. In so doing, the value instability problem with memory polynomial model is solved as a result. The paper describes in detail memory polynomial model and its implementation using LUT. The model is validated using one-carrier WCDMA signal as test signal and a 60-Watt GaAs FET Push-Pull amplifier （FLL600IQ-2） operated with a range of 1930-1990 MHz, The result indicates that LUT-based memory polynomial RF power amplifier model is capable of satisfactorily describing the nonlinear dynamic behavior model of wideband RF transmitters.

关 键 词：记忆效应 查找表 记忆多项式 射频功放建模 

分 类 号：TM933.3[电气工程—电力电子与电力传动]