【作者】 牛伟； 王敏锡； 陈凯亚；

【Author】 NIU Wei;WANG Min-xi;CHEN Kai-ya;The Dept.of Electromagnetic and Microwave of South West Jiaotong University;

【机构】 西南交通大学电磁场与微波技术研究所；

【摘要】 提出用有理函数来实现级联自适应预失真器,用于移动发射机中的功率放大器线性化。基于极坐标形式的自适应有理函数预失真器具有实现简单和收敛速度快等优点。通过对行波管功率放大器的非线性幅度和相位特性的线性化、抑制互调失真能力等方面来表明基于有理函数级联自适应预失真器的行为特性。计算机的仿真结果表明:该方法具有较好的非线性补偿效果,且抑制性能好。更多还原

【Abstract】 In this paper we propose an cascaded adaptive predistorter implemented by rational function, applied to linear adaptive power amplifiers in mobile transmitters. Base on polar coordinates representation, the adaptive predistorter of rational function has low complexity in implementation and a fast rate of convergence. The performance of the proposed cascaded adaptive predistorter of rational function is illustrated by linearizing traveling wave tube(TWT) nonlinear amplitude and phase characteristics,suppression of intermodulation products.The result of computer simulation shows that the method converges fast and robust ability of suppression, and so on.更多还原