When supply modulation and contour modulation are working in concert, the dynamic range and efficiency of the power amplifier can be further improved.
当电源调制和轮廓调制协同工作时，功率放大器的动态范围和效率可以进一步提高。
Contour modulation is a technique in which a phase-modulated signal waveform and amplifier output impedance work together to maintain higher efficiency over a sizable output power back-off.
轮廓调制结合了一种相位调制信号的波形和放大器的输出阻抗，可在某个较大型输出电源关闭后保持更高的效率。
Pulse Width Modulation electronic speed control for highest efficiency.
脉宽调制效率最高的电子速度控制。
Controller: Pulse Width Modulation electronic speed control for highest efficiency.
控制器：最高效率脉宽调制电子调速器。
Modulation depth and coupling efficiency were calculated in the range where LP03 mode are cut-off and LP02 mode are guided.
在少模光纤的LP03模截止且LP02导通的参数范围内，计算了调制深度和耦合效率与少模光纤参数的关系。
Modulation technique is very meaningful for the digital data transmission efficiency.
调制技术对数据传输效率有重要的意义。
It spurs us to develop highly efficient coding, modulation and signal processing techniques to improve the wireless frequency spectrum efficiency.
这种挑战使得人们努力开发高效的编码、调制以及信号处理技术来提高无线频率的效率。
The amplitude modulated wave with any modulation factor is discussed in this paper. Its expression, spectrum and formula of the modulation factor, modulation efficiency, SNR gain are given.
本文讨论了调幅系数为任意值的调幅波，给出了它的表达式、频谱及调幅系数、调制效率和信噪比增益的计算公式。
Also, optimizing design and analysis showed that the decrease of modulation efficiency due to modulating in claddings can be compensated by appropriately reducing the size of cores.
通过优化设计与分析发现适当降低波导芯层的尺寸可以弥补因包层调制引起的调制效率的下降。
To increase the bandwidth efficiency, such a system scheme use the MSK modulation method combining with a premodulation filter.
文中讨论了以MSK调制技术结合预调滤波器提高带宽效率的系统构建方案。
FQPSK is a modulation technique that fits for high spectrum efficiency and high power efficiency request.
FQPS K是针对高频谱效率和高功率效率要求产生的一种调制方式。
The characteristics of the diffraction efficiency, compression, cross modulation, and intermodulation intensities are analysed theoretically.
分析了多维声光衍射的衍射效率、压缩、交叉调制和互调制强度等特性。
Double space vector modulation can realize zero current commutation of the rectifier side, greatly reduce the switch loss, and improve the efficiency of the converter.
双空间矢量调制两级协调控制能实现整流级零电流换流，极大地减少了开关损耗，提高了变换器的效率。
Joint frequency and phase modulation (JFPM) utilize frequency and phase information to realize higher efficiency in the frequency and power.
联合频率相位调制(JFPM)同时利用频率信息及相位信息，具有较高的频带利用率和功率效率。
As a new communication technology, PPM (pulse position modulation) technology can be easily coded, and has a high efficiency of energy transmission.
PP M脉冲位置调制通信技术作为一种新兴的通信技术，具有编码简单、能量传输效率高的优点。
QAM (Quadrature Amplitude modulation) has been widely used in various digital communication systems due to its high modulation efficiency.
正交幅度调制(QAM)具有较高的调制效率，被广泛应用于各种数字通信系统中。
On the other hand, adaptive modulation technique can enhance data rate, spectrum efficiency and transmission reliability in MIMO-OFDM systems.
另一方面，对于MIMO - OFDM系统来说，自适应调制技术可以提高系统的数据传输率、频谱效率以及传输的可靠性。
The digital modulation applied in the front of HDTV needs good band efficiency and power efficiency.
在数字电视前端采用的数字调制方式需要具有良好的带宽效率和功率效率。
The effects of group-velocity mismatch and dispersion, third-order nonlinear phase modulation on pulse shape, spectrum distribution and conversion efficiency of second-harmonic pulse were discussed.
详细讨论了群速度失配、群速度色散和三阶非线性相位调制效应对倍频光脉冲波形、光谱及转换效率的影响。
The best system of efficiency and function are becoming the pressure frequency conversion velocity modulation system in the various asynchronous electrical machinery velocity modulation system.
在各种异步电机调速系统中，效率及性能最好的系统是变压变频调速系统。
Space-time trellis code combining space diversity with code and modulation, can improve efficiency and reliability of communication system in wireless channel efficiently.
发射端分集、编码和调制结合空时格码，可以有效地提高信号在无线衰落信道中传输的有效性和可靠性；
In order to solve the lower measurement efficiency in traditional modulation profilometry, a fast modulation profilometry is proposed based on double color projections.
针对传统调制度轮廓术测量速度较慢的问题，本文提出了彩色双通道投影的调制度轮廓术。
Therefore, it has a practical significance to develop some fit methods of modulation with high spectrum efficiency for shortwave FH communication system.
因而，研究适合于高速数据传输的跳频通信特点且具有高效频谱利用率的调制技术具有重要的实际意义。
SPWM modulation is the important way to improve the invert power supply voltage efficiency and reduce the harmonic component.
SPWM调制是提高逆变电源电压利用率和减少谐波分量的重要方法。
This scheme combined the advantages of SDH technology and ATM technology, improved adaptation efficiency from DVB signal to SDH network, and satisfied HFC modulation mode's flexibility.
该方案结合SDH技术和AT M技术两者的优点，提高了DVB信号适配到SDH网络的适配效率，同时满足了HFC不同调制方式的灵活性。
Adaptive modulation can improve the system performance with high spectral efficiency.
自适应调制能提高系统的频谱利用率和改善系统的误码率性能。
Test results show that the continuous control method during over-voltage modulation period features simplicity, high efficiency and excellent control effect.
试验结果表明，过调制区连续控制方法简单、高效、控制效果良好。
Adaptive modulation and coding (AMC) can effectively improve the spectral efficiency for wireless data transmissions.
自适应编码调制(amc)技术可以有效地提高无线数据传输的频谱利用率。
The controller combines parallel amplification and drain modulation of the CMOS class-E power amplifier to provide high efficiency over a broad range of output powers.
结合射频E类功率放大器的结构特点，采用CMOS工艺，达到了在大的输出功率范围内保持持续稳定高效率的目的。
Multimode modulation is a good method to increase the frequency efficiency and to maintain smaller frequency occupancy rate.
其中多进制调制，不仅能够提高频谱利用率，并且能保证较小的频谱占用率。
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