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。
In this paper, an adaptive modulation system controlled by changing the symbol rate and modulation level is proposed.
一旦查出问题后，调制解调器需要重新连接和测试，来验证正常的传输电平。
Once the problem is fixed, the modem is reconnected and tested to verify normal transmit levels.
其它特性包括：集成缓冲用来驱动基准电压，以及集成完全差动放大器用来缓冲调制器输入并进行电平转换。
Other features include an integrated buffer to drive the reference as well as a fully differential amplifier to buffer and level shift the input to the modulator.
提出了一种基于三电平spwm调制的中点电压抑制方法，在改善输出波形质量的同时，有效的降低了IGCT过电压的危险。
A method of keeping neutral point potential balanced based on three-level SPWM had been brought forward, which can improve output waveform and decrease the possibility of IGCT's over-voltage.
比特软信息提取技术是针对多电平调制与二进制译码的结合而采用的一种方法。
The soft symbol to bit mapping technique is an effective way to combine the multilevel modulation and binary decoding.
该文提出并分析了错时采样空间矢量调制(STS - SVM)技术的工作原理及其在级联型多电平变流器上的实现方法。
In this paper, the principle of Sampling Time Staggered Space Vector Modulation (STS-SVM) as well as its realizing method in cascade multilevel converters is presented.
检验高调制解调器电平？检查家庭配线？检查所有系统组件。
Troubleshoot High Modem Levels? Qualify Home Wiring? Verify All System Components.
仿真结果验证了组合拓扑结构及组合调制策略的有效性，为多电平逆变器组合拓扑结构的实际应用奠定了基础。
The simulation results proved that the validity of hybrid structure and corresponding modulation strategies, it lays the foundation of practical application on hybrid multilevel inverter structure.
为了防止现代的高电平输出，可使用RT100替代调制解调器。
In cases of high modem output levels (or inability to lock) the modem can be replaced by the RT100.
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。
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.
采用级联型多电平逆变器给异步电机供电，逆变器的开关信号利用载波移相脉宽调制方法生成。
The asynchronous machine is fed by cascaded multilevel inverter, and the inverter switching signals are generated by carrier phaseshifted pulse width modulation method.
围绕多电平变换器，新型电路拓扑及相关调制策略层出不穷。
Novel topologies and modulation strategies concerning multilevel converters are emerging continuously.
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。
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.
同时，基于传统的应用于多电平逆变器的多载波spwm调制策略，提出了对应于组合拓扑结构的组合调制策略。
At the same time, based on conventional modulation strategies-multi-carrier SPWM applied on multilevel inverter, hybrid modulation strategies are introduced corresponding to hybrid structure.
提出了一种新颖的多电平矩阵变换器，介绍了其拓扑结构、工作原理和空间矢量调制技术。
A novel multilevel matrix converter is proposed, and its topology configuration, operating principles and space vector modulation technique are introduced.
详细叙述了三电平pw M变频器在输出调频、调压和PWM调制控制中的作用以及三电平pw M变频器的优异性能。
The excellent properties of the TPFT and its function in the output frequency regulation, voltage regulation and PWM modulation control are stated in detail.
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。
Particle swarm optimization is firstly applied to optimize a three level voltage pulse width modulation inverter in this paper.
详细论述了多电平PAM（脉冲幅度调制）系统的最佳均衡理论。
The optimum equalization theory for overcoming the intersymbol interferences (ISI) in multi-level pulse amplitude modulation (PAM) systems is establishead.
根据单元级联多电平变换器拓扑结构及其脉宽调制技术的特点，以数字信号处理器和复杂可编程逻辑器件为核心，设计了多电平变换器的控制器。
On the basis of topology of cascaded multilevel convertor and its PWM technique, designed the controller of multilevel convertor at the core of DSP and CPLD.
在软件无线电平台上研究并实现了ASK、FSK、QPSK等方式的调制解调算法，并给出了调制解调的流程图和主要部分的程序。
Having realized the modulation and demodulation algorithm of ASK, FSK, QPSK on the software radio platform, and has provided the modulation and demodulation flow chart and the main part procedure.
传统两电平脉宽调制电磁轴承开关功放的电流纹波较大，导致电磁轴承中产生的纹波损耗较大。
Different from conventional two-level PWM switching power amplifier, the switching power amplifier can achieve current ripple reduction.
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 neutral-point voltage fluctuation of three-level converter is only related to applied modulation method and three-phase current.
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。
And to three-level inverter as an example, the nature contact of the triangular-carrier modulation method and space vector method is derived.
本文将软件无线电技术和OFDM多载波调制技术相结合，提出了基于软件无线电平台的OFDM多载波传输系统方案。
This paper mainly focuses on the combination of OFDM system with the Software Radio technology and presents OFDM transceiver scheme based on Software Radio platform.
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。
In Chapter 8, Active functions of DFBPE output and equalization algorithm are modified for the adaptive equalization of multi-level modulation signal.
从理论和实验角度研究了调制脉冲特性、调制器承受激光辐照能力及门控触发电平的同步性。
The characteristic of laser pulse, damage thresholds of chopper and synchronization of TTL trigger are evaluated by theoretical analysis and experimental measurement.
从理论和实验角度研究了调制脉冲特性、调制器承受激光辐照能力及门控触发电平的同步性。
The characteristic of laser pulse, damage thresholds of chopper and synchronization of TTL trigger are evaluated by theoretical analysis and experimental measurement.
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