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This article presents an adaptive digital predistortion (DPD) for linearizing RF power amplifiers (PA). The idea is to use nonlinear curve-fitting in conjunction with the look-up table to adaptively pre-adjust the gain and the phase of the input data before it is fed to the amplifier. The performance of the algorithm is tested by simulation. The input data is that of the standard IS-95A test signal...
Nonlinearity has long been recognized as a problem endemic in power amplifiers (PA) with a high power. Digital predistortion (DPD) is one of most effective method to solve this problem. The D/A conversion accuracy on the performance of DPD for RF PA is tested in a hardware platform. The device under test is an actual working 30W PA operating at 881.5 MHz. An in-house DPD algorithm is implemented on...
Nonlinearity has long been recognized as a problem endemic in power amplifiers (PA) with a high power. Digital predistortion (DPD) is one of most effective method to solve this problem. In this paper we used nonlinear curve-fitting to perform digital predistortion. We applied our technique to a RF power amplifier that nominally operates at 885 MHz with 30 watts output. When the IS95 standard test...
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