Time-frequency system is employed for the channel.
通道采用时间-频率划分。
Variable voltage and variable frequency system based on vector control is applied widely in high speed train.
基于矢量控制的变压变频调速在高速列车中得到广泛应用。
This paper discusses the method that is applied in SPWM variable frequency system based on editable DSP controller.
阐述了一种以可编程DSP控制器为核心的应用于变频系统中正弦脉宽调制（SPWM）方法的实现。
In this thesis the signal processing of stepped frequency system which applied in the millimeter wave seeker is discussed particularly.
本文主要针对毫米波导引头频率步进体制的信号处理技术进行了研究。
In the ultra high frequency system, the frequency compounder section of the transmitting frequency is operated with DDS/PLL technology.
在甚高频系统中，射频的的频率合成器部分采用DDS/PLL技术。
LTCC is the important composite of modern microelectronic packaging. The perfect properties make it useful widely in the high-speed and high-frequency system.
LTCC是现代微电子封装中的重要组成部分，因性能优良而广泛应用于高速、高频系统。
The AC-DCAC voltage source inverter composes the main circuit of this variable frequency system and CPLD is the logic control device of the power device (IPM).
该变频调速系统主电路采用交-直-交形式，以(CPLD)作为调速系统逆变电路功率开关器件(IPM)的逻辑控制器件。
Introduce the work principle of the cold roller about two frequency quenching device and intermediate frequency system, the method of debugging and valuable experience.
介绍了冷轧辊双频淬火装置中频系统的工作原理、调试方法和宝贵经验。
A new method for height finding using monopulse measurement based on stepped-frequency system is discussed in this paper for enhancing low-altitude detection of metric-wave radar.
为了提高米波雷达低空探测性能，本文讨论步进频率体制下，单脉冲测角的米波雷达测高方法。
The simulation results prove that the three-phase phase-locked loop can work well in disturbance situation and variable frequency system when the frequency of the inputs is variable.
并对相位突变和频率突变的情况进行了仿真研究，说明在相位和频率发生变动时三相锁相环仍能有效地锁定相位，能够满足系统变频的要求。
The simulation results indicate that the designed fuzzy power system stabilizer is better than the conventional fuzzy power system stabilizer in suppressing the low-frequency system swing.
仿真结果表明所设计的模糊电力系统稳定器比传统的电力系统稳定器能更有效地抑制系统低频振荡。
The embodiment of the invention relates to the field of electronic communication, in particular to a base station radio frequency duplexer, a radio frequency module and a radio frequency system.
本发明实施例涉及电子通信领域，尤其是一种基站射频双工器、射频模块和射频系统。
The paper has done all-around study on the key technology of BDFM variable frequency system from theory to simulation and has established stability theoretical foundation for continue study work.
本文对无刷双馈电机变频调速系统的关键技术进行了较为全面的从理论到仿真的深入研究，为今后进一步的研究奠定了一定的理论基础。
The system design must be synthetically considered among the sampling frequency, system design index and implementing cost.
系统设计必须在采样频率、系统设计指标和实现成本之间进行综合考虑。
The system design must be synthetically considered among the sampling frequency, system design index and implementing cost.
系统设计必须在采样频率、系统设计指标和实现成本之间进行综合考虑。
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