A novel analog predistortion linearization technique for RF-in RF-out power amplifier

Ashish Kumar, M. Rawat
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引用次数: 2

Abstract

Predistortion is a popular technique for the linearization of high power amplifiers. Among predistortion techniques, while digital predistortion (DPD) enjoys advantages of configurability and improved performance, analog predistortion (APD) has advantages such as lower footprint and high bandwidth operation. As baseband information is not required for APD, it finds its application in repeater systems, where incoming RF signal needs to be re-transmitted using high power amplifier. This paper presents a modified analog predistorter solution for high power amplifier, which provides better solution at lesser power back-off leading to optimum utilization of high power amplification unit.
RF-in - RF-out功率放大器的模拟预失真线性化新技术
预失真是高功率放大器线性化的常用技术。在预失真技术中,数字预失真(DPD)具有可配置性和性能提高的优点,而模拟预失真(APD)具有占用空间小、带宽高的优点。由于APD不需要基带信息,因此它在中继器系统中得到了应用,在中继器系统中,输入的射频信号需要使用高功率放大器进行重传。本文提出了一种改进的高功率放大器模拟预失真器解决方案,该方案在较小的功率回退下提供了更好的解决方案,从而使高功率放大单元得到最佳利用。
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