In this paper, an adaptive modulation system controlled by changing the symbol rate and modulation level is proposed.
本文研究了通过改变符号率及调制电平的方法实现的自适应调制系统。
The effect of chaotic switching modulation signals of different chaotic characters on reducing the level of EMI is analyzed.
对不同性质混沌调制信号降低电磁干扰水平效果进行了分析。
The power penalty of direct modulation is smaller than that of external modulation at the same crosstalk level.
在相同串扰水平情况下，直接调制的功率代价小于外调制的功率代价。
As an attosecond ultrafast modulation process, FASPB can be intrinsically extended to any level-summation systems of two dipolar forbidden excited states.
FASPB作为一种阿秒超快调制过程，从理论上说它可以扩展到任何两偶极禁戒跃迁激发态的能级和系统。
As the key point of expression modulation in prokaryotic and eukaryotic cells, the protein phosphorylation and dephosphorylation may help reveal the status of the life system at the molecular level.
蛋白质磷酸化和去磷酸化作为原核和真核细胞表达调控的关键环节，了解其对功能的影响可以深入理解生命系统在分子水平的调控状况。
This scheme exhibits a good PAPR reduction performance, and for signals of high level modulation, such as 16qam and 64qam, it approaches the best performance of all SLM schemes.
结果表明该方案在抑制峰均比方面呈现出很好的性能，对于高阶调制信号，如16QAM和64qam，它甚至达到选择性映射所能实现的最佳性能。
Simulation results demonstrate: the chaotic modulation signals generated from the four kinds of chaotic sources can all reduce the peak level of the input current and the output voltage spectrums.
仿真结果表明：四种混沌源调制生成的混沌开关调制信号，均能够降低电源的输入电流及输出电压的频谱峰值。
A pulse width modulation controller comprises a disabling unit, a level sensor and an over current protector.
脉冲宽度调制控制器，包括一个禁用单位，水平传感器和过电流保护。
It provides excellent frequency and level control, and wide analog modulation capabilities.
它提供优秀的频率和程度控制，宽模拟制式能力。
A novelty space vector pulse width modulation (SVPWM) technique for the two-phase inverter-fed asynchronous motors system is proposed, which can be widely used in the low or middle power level field.
研究了二相逆变器-异步电动机系统的空间矢量脉宽调制(SVPWM)控制技术。
In modulation driving circuit, with the chip MAX3263, being the function of APC, there is standard PECL level interface to modulate laser modulation current and preset current neatly.
在调制驱动电路中，采用MAX3263芯片，具备标准的PECL电平接口，可以灵活地调整激光器的预置电流和调制电流，并具备自动功率控制功能。
A data aided symbol timing estimation algorithm was proposed for burst-mode space-time trellis coded multi-level continuous phase modulation (STTC-MCPM) systems in Rayleigh fading channels.
针对瑞利衰落信道中突发模式的空时网格编码的多电平连续相位调制(STTC - MCPM)系统，提出了一种基于数据辅助的符号定时估计算法。
The optimum equalization theory for overcoming the intersymbol interferences (ISI) in multi-level pulse amplitude modulation (PAM) systems is establishead.
详细论述了多电平PAM（脉冲幅度调制）系统的最佳均衡理论。
RF power modulation is used to control the codeposition and the selective silicon removal steps with the later proceeds whenever the RF power is turned off or reduced to a low level.
使用RF功率调变控制该共沉积作用及该选择性硅去除步骤，后者步骤总是在关闭该R F功率或是将其降至低水准时进行。
The sea level and current velocity have an effect on wave height, and the wave direction modulation is small.
潮汐、风暴潮对波浪的作用是通过其产生的不定常水深与流场实现的；水深与流速对波向的影响很小。
A new calculation method of crossing-modulation-ratio is presented in this paper, the method is suitable for output level distribution of CATV network system under all conditions.
文中提出了一种新的交调比计算方法，适宜各种条件下的CATV联网系统在分配输出电平时使用。
A novel structure of combing two-level coding and 8psk modulation is proposed in this paper.
提出了一种将两级编码与8psk结合的新型编码结构。
The system also supports two level hierarchical channel coding and modulation, including uniform and multiresolution constellation.
系统还支持两层次式通道编码与调变，包括均匀与多分辨率群集。
Particle swarm optimization is firstly applied to optimize a three level voltage pulse width modulation inverter in this paper.
该文首次将粒子群算法用于三电平正弦脉冲宽度调制开关时刻的优化。
And to three-level inverter as an example, the nature contact of the triangular-carrier modulation method and space vector method is derived.
并以三电平逆变器为例，推导了三角载波调制法和空间矢量法的本质联系。
The invention is a micro-accelerometer of the silica-based ring resonator with the advantages of small size structure, high integration level and high modulation speed.
本发明是一种结 构尺寸小、集成度高、调制速度快的硅基环形谐振腔的微加速度计。
In Chapter 8, Active functions of DFBPE output and equalization algorithm are modified for the adaptive equalization of multi-level modulation signal.
第八章对判决反馈BP网络均衡器输出的激活函数及算法进行了改进，使算法能够有效地应用于多电平调制信号的自适应均衡。
The neutral-point voltage fluctuation of three-level converter is only related to applied modulation method and three-phase current.
三电平变流器的中点电压波动只与变流器采用的调制技术和三相电流有关。
The topology and modulation method of high-power inverter is introduced. Described the implementation principle of multi-level inverter with cascaded H bridge based on 2-level control technique.
论文首先对多电平逆变器发展前景进行概述，介绍了大功率逆变器的拓扑结构及调制方法。
The topology and modulation method of high-power inverter is introduced. Described the implementation principle of multi-level inverter with cascaded H bridge based on 2-level control technique.
论文首先对多电平逆变器发展前景进行概述，介绍了大功率逆变器的拓扑结构及调制方法。
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