线性功率放大器有失真小、线性好等优点，但是其损耗大，效率低。
Linear power amplifier has low distortion and good linearity, but it has high loss and so low efficiencies.
针对径向力的控制要求研制了双向电流型线性功率放大器和PID控制器。
The linear power amplifier of current-type and the PIDcontroller is designed for the control of radial force.
目前线性功率放大器的设计主要采用前馈、预失真和功率回退等线性化技术。
Feedforward, Predistortion and Feedback linearization techniques are mostly used in Linearity Power Amplifier Design.
所设计的射频2W线性功率放大器是基于负载线匹配原理，采用功率回退法技术。
The 2W linear RF Power Amplifier in this paper is designed in Feedback method, based on Loadline Theory.
智能天线子系统中，射频前端模块包括线性功率放大器，低噪放大器，检测控制电路。
In intelligent peripheral subsystem, Radio Frequency Front Modules include linear power amplifier, low noise amplifier and detection control circuit.
采用电力电子开关功率放大器取代传统的线性功率放大器，极大地减小了装置的体积和重量。
The weight and volume of the power electronics equipment will be minished greatly by using switch-mode power amplifier instead of the traditional linear power amplifier.
本文对固态线性功率放大器的研制包括：前级放大器的研制、驱动级放大器的研制、末级放大器的研制。
There are three development for the Middle Power Amplifier : the first stage power amplifier, the drive stage power amplifier and the last stage power amplifier .
寻求先进、高效、实用、稳定、可靠的UHF电视发射机高频线性功率放大器，至今仍是一个十分重要的技术课题。
Pointed out that it is a very important subject to look for the advanced, high-efficiency, useable, stable, reliable high linear power amplifier of UHF TVtransmitter by now.
于是功率放大器的线性化以及提高效率的技术被采用来改善发射器的线性度和效率。
Linearization and efficiency enhancement techniques of power amplifier can be adopted to improve the linearity and power efficiency of the transmitter.
理论分析结果表明，单周控制开关功率放大器的输出信号与输入信号成线性变化关系，其控制性能由输出滤波器决定。
The theory research results of one cycle controlled switching power amplifier show that the output signal follow the input signal linearly, and the control performance is decided by output filter.
大功率滤波器(38)位于功率放大器(20)的下游并引起线性失真。
A high power filter (38) is located downstream of the power amplifier (20) and causes linear distortion.
于是多种不同功率放大器的线性化技术被采用来改善无线发射机的线性度及效率。
Various PA linearization techniques have been adopted to improve linearity and power efficiency of wireless transmitters.
在WCDMA等宽带通信系统中，射频功率放大器记忆效应明显，传统的无记忆预失真技术无法达到理想的线性化效果。
In broadband communication systems, such as WCDMA, memory effects of RF power amplifiers (PAs) are significant and memoryless predistortion techniques cannot linearize PAs effectively.
随着移动通信中线性调制方式的出现，功率放大器的线性化已成为一个重要的研究课题。
Linearization of power amplifiers has become an important issue, with the advent of linear modulation methods in mobile communication.
本文研究了预失真技术在CD MA2000系统中的应用，设计了一种实用的数字预失真系统来提高功率放大器的线性度和效率。
Application of predistortion technology in CDMA2000 system is discussed in this paper. And a practical digital predistortion system is proposed to improve linearity and efficiency of power amplifier.
要解决这个问题，必须采用线性化技术来改善高效率功率放大器的非线性特性。
For solving this problem, various linearization techniques have been employed to improve the linearity of high efficiency power amplifier.
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.
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.
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).
预失真线性化技术理论上是最简单的RF功率放大器线性化技术。
Predistortion linearization technology is conceptually the simplest form of linearization for an RF power amplifier.
为了在不损失效率的条件下降低功率放大器的非线性失真现在广泛采用了线性化技术。
Linearizeation technology is now widely used in order to reduce the power amplifier nonlinear distortion without loss of efficiency.
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.
本文提出了一种用于正交频分复用（OFDM）系统中由大功率放大器引起的非线性失真的有效的数字自适应补偿方法。
The paper presents an efficient digital adaptive method compensating for nonlinear distortions caused by a high-power amplifier (HPA) in orthogonal frequency division multiplexing(OFDM) system.
前馈技术是功率放大器线性化的主要技术之一。
Feedforward is one of the power amplifier linearization technologies.
开关功率放大器的优势是它具有高效率，但是由于其本身固有的非线性，开关功率放大器的失真通常大于传统的线性放大器。
The advantage of the switching amplifier is the high efficiency, but the distortion is still bigger than the linear amplifier because of the switching working and it's non-linear.
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.
研究了DBF发射多波束阵列中固态功率放大器（SSPA）非线性引起的互调波束的影响。
This paper investigates the effects of intermodulation(IM) beams produced by the nonlinear behavior of solid-state power amplifiers(SSPA) on the DBF transmiting multiple-beam array.
研究了DBF发射多波束阵列中固态功率放大器（SSPA）非线性引起的互调波束的影响。
This paper investigates the effects of intermodulation(IM) beams produced by the nonlinear behavior of solid-state power amplifiers(SSPA) on the DBF transmiting multiple-beam array.
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