一种基于频分复用的预失真补偿算法设计与实现
发布时间:2019-01-05 03:02
【摘要】:频分复用即OFDM。采用OFDM技术的系统中,传输信号对高功率放大器(HPA)的非线性非常敏感,会造成码间干扰和邻道干扰。提出一种并行结构预失真方法,采用多项式和Hammerstein预失真器两个并行模块,分别补偿功放无记忆非线性失真和低阶记忆非线性失真。仿真结果表明,提出的并行结构预失真补偿算法能有效地改善信号非线性失真,实现HPA的线性化。
[Abstract]:Frequency Division Multiplexing (OFDM.) In the system using OFDM technology, the transmitted signal is very sensitive to the nonlinearity of the high power amplifier (HPA), which will cause inter-symbol interference and adjacent channel interference. A parallel structure predistortion method is proposed in which two parallel modules polynomial and Hammerstein predistortor are used to compensate memoryless nonlinear distortion and low order memory nonlinear distortion respectively. Simulation results show that the proposed parallel structure predistortion compensation algorithm can effectively improve the nonlinear distortion of the signal and realize the linearization of HPA.
【作者单位】: 91404部队;
【分类号】:TN722.75;TN929.53
[Abstract]:Frequency Division Multiplexing (OFDM.) In the system using OFDM technology, the transmitted signal is very sensitive to the nonlinearity of the high power amplifier (HPA), which will cause inter-symbol interference and adjacent channel interference. A parallel structure predistortion method is proposed in which two parallel modules polynomial and Hammerstein predistortor are used to compensate memoryless nonlinear distortion and low order memory nonlinear distortion respectively. Simulation results show that the proposed parallel structure predistortion compensation algorithm can effectively improve the nonlinear distortion of the signal and realize the linearization of HPA.
【作者单位】: 91404部队;
【分类号】:TN722.75;TN929.53
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