基于MC FQRD RLS算法的功放建模方法  

Power Amplifier Nonlinearity Modeling Based on MC FQRD RLS Algorithm

作　　者：李铀[1] 张晓林[1] 肖鑫[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191

出　　处：《电视技术》2011年第2期20-21,29,共3页Video Engineering

基　　金：北京市重点学科基金资助项目(XK100070525)

摘　　要：在地面广播电视传输系统中,为了提高效率,功率放大器通常工作在非线性区。由此引入的非线性,必须进行校正。如果能够得到功率放大器的非线性模型,校正工作就能取得很好的效果。提出了一种基于多通道快速QR分解RLS算法的建模方法。传统的QRD RLS算法具有收敛速度快和数值稳定的优点,但其缺点是算法的计算量很大,对硬件资源的需求大,也不利于实时地对信号进行处理。MC FQRD RLS算法很大程度上减少了计算量,同时保持了传统QRD RLS算法的各种优点。In terrestrial broadcasting system, the power amplifier works in nonlinear region accounting for efficiency. The nonlinearity of the power amplifier must be compensated. The compensation will be implemented easily if the nonlinear model of power amplifier is obtained. In this paper,a kind of modeling for power amplifier based on multi channel fast QR decomposition recursive least square （MC FQRD RLS） algorithm is proposed. The conventional QRD RLS algorithm has the merit of fast convergence and data stability. But large amount of computation are required and is not suitable for real-time processing, the computation complexity is decreased a lot by the MC FQRD RLS algorithm and die advantage of the conventional one is retained.

关 键 词：MC FQRD RLS 功放非线性 建模 Volterra模型 

分 类 号：TN830.6[电子电信—信息与通信工程]