RF Amplifier Predistortion
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RF amplifier predistortion is a technique primarily aimed at enhancing the performance of wireless communication systems. This method employs the Saleh amplifier parameters and model configurations to achieve its objectives. The technique involves preprocessing transmission signals to mitigate distortion and nonlinear effects caused by amplifier saturation. In practical implementation, the memory-based Saleh model typically requires parameter extraction through curve-fitting algorithms applied to measured AM-AM and AM-PM characteristics. Key functions include implementing complex gain polynomials and designing lookup tables (LUTs) for real-time distortion compensation. Modern communication systems widely adopt this approach as it significantly improves transmission quality and system performance through digital signal processing (DSP) techniques that invert the amplifier's nonlinear behavior prior to signal amplification.
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