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This paper presents an overview of system-level solutions for green wireless communication infrastructure. It illustrates that a combination of high efficiency amplification system with a linearity restoration technique is unavoidable. Currently, Doherty power amplifiers along with digital predistortion technique are able to achieve high power efficiency. However, due to the limited bandwidth of digital...
An analog predistorter (APD) for VHF application is presented. The proposed predistorter is fully composed of lumped elements. It has a moderate memory compensation capability by using a lowpass filter, and also includes a compact IM3 generator which is capable of canceling the fundamental components. For verification, the proposed predistorter is implemented and applied to a RF power amplifier for...
This paper presents a fully orthogonal frequency-selective baseband predistortion linearization system for RF multi-carrier power amplifiers (PA) affected by strong differential memory effects. A new scheme is introduced for removing the unwanted inband frequency components generated by the interband predistortion corrections, thus establishing full orthogonality between the interband and inband predistortion...
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