为保证通信质量需要使用高线性的功率放大器，而高效率的功率放大器通常是非线性的。
The high linear power amplifier has to be used to guarantee communication quality. Unfortunately, power efficient amplifiers are typically nonlinear.
而功率放大器又具有非线性特性，因此要设计高效率又高线性度的无线发射机便成了一个相当困难的挑战。
Designing a high linearity and high power efficiency wireless transmitter is a big challenge due to the nonlinear characteristic of the power amplifier.
作为卫星通讯系统所用的高增益、高功率微波放大器件，行波管的效率和线性是非常重要的。
High efficiency and high linearity space traveling wave tube (TWT) is required for satellite communication system as a high power, high gain microwave amplifier.
自适应数字预失真是补偿高功率放大器非线性的一种有效技术。
Adaptive digital predistortion is an effective technique which compensate nonlinear distortion introduced by the high power amplifier (HPA).
自适应基带预失真技术是用于补偿高功率放大器非线性失真的一种有效技术。
Adaptive baseband predistortion is an effective technique for compensating nonlinear distortion introduced by high power amplifiers.
OFDM系统的一个主要缺陷就是峰平比过高引起的高功率放大器(HPA)的非线性失真。
The OFDM system has a major disadvantage that high peak to average power ratio (PAPR) can cause nonlinear distortion in the high power amplifier (HPA).
本文提出一种线性化射频多载波高功率放大器的自适应射频预失真器。
This paper presents an adaptive RF predistorter to linearize multi-carriers power amplifiers.
前馈技术是目前实现高功率宽带放大器的最理想方法，该技术可以在较宽的范围内满足更为严格的线性化指标。
Feedforward is the most ideal way to perform broadband high power amplifier, which can accomplish more stringent linear specifications.
但是OFDM信号有高的峰值平均功率比，当它通过高功率放大器时会导致非线性失真，从而使得系统的性能下降。
But the OFDM signal has a large PAPR, which results in the significant nonlinear distortion when it passes through a HPA (high power amplifier), thereby the performances of the system descend.
半导体光放大器(SOA)由于具有高非线性特性、低开关功率和尺寸较小等优点，非常适合用来实现全光码型转换。
Semiconductor optical amplifier (SOA) is very fit for all optical modulation format conversion due to its high nonlinear characteristics, lower switch power and small size.
由于其具有良好的动态和线性特性，可以把此类宽带功放作为推动功率放大器使用，同后级功放一起构成宽带、高增益、高功率放大器。
They could also be served as a driver amplifier because of its good dynamic range and linearity and could be associated with another one to build up a wideband high power amplifier.
由于其具有良好的动态和线性特性，可以把此类宽带功放作为推动功率放大器使用，同后级功放一起构成宽带、高增益、高功率放大器。
They could also be served as a driver amplifier because of its good dynamic range and linearity and could be associated with another one to build up a wideband high power amplifier.
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