摘要
通过典型的功放无记忆模型分析了功放的非线性对DAB信号所造成的失真及基带预失真技术的作用机理。介绍一种基于该机理的硬件实现,通过在数字基带对信号进行预失真处理,补偿后端的射频功放所产生的非线性幅度失真和相位失真,从而有效地改善了DAB射频功放的线性度。
This paper presents a scheme for the linearization of HPA(High Power Amplifiers) by using digital baseband predistortion. The theory of baseband predistortion is discussed. The effects of the amplifiers' nonlinearity to OFDM signal are mentioned. The digital baseband predistortion scheme for DAB system is implemented based on a look_up table. It gives an applicable result.
出处
《电声技术》
2005年第3期54-57,共4页
Audio Engineering
