介绍了数字预失真的基本原理,设计了1个预失真系统,并进行了MATLAB和ADS联合仿真,验证了系统的线性化程度.根据软件仿真,预失真系统改善输出信号的ACPR达20dB以上,设计的数字预失真模块对功放的线性度改善效果明显.%Introduced digital pre-distortion ( DPD) principle, designed a digital pre-distortion system, simulated with MATLAB and ADS, validated the linearization of the system. Based on the simulation, the output signal ACPR improved morn than 20 dB, the digital pre-distortion module had an obvious improvement to the PA linearization.
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