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。
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。
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。
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。
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。
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 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；
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。
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。
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 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。
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。
应用推荐