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。
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。
Quantum well laser diodes are of high modulation frequency response. They can be used as light sources and be directly modulated for high bit rate optical communications.
量子阱激光器具有良好的小信号调制频率响应，能作为高速光通信光源采用直接调制方式进行信号传输。
The concerted control strategy of rectifier and inverter is analyzed to keep high modulation degree of SPWM, which achieves quick response and high resolution of excitation voltage regulation.
重点分析了整流器和逆变器的协调控制策略，始终保持SPWM高调制度，达到励磁电压调节的快速响应和高分辨率。
High frequency pulse width modulation power control systems can be realized using semiconductor switches.
高频脉冲宽度调制电力控制系统，可以实现用半导体开关。
The experiment results justify the high recognition rate with less samples, thus the method can be used in the digital signal modulation recognition system.
实验结果表明，该调制识别方法在小样本下具有较高的识别率，可以应用在数字信号的调制识别系统中。
The numerical simulation also shows that fundamental soliton pulses with high repetition rate can be generated in this kind of fiber by modulation instability.
数值模拟显示，利用色散缓变光纤中的调制不稳定性可以产生高重复率的基本孤子脉冲串。
In the air compressor demand is not high, the general use of the modulation control, that is, through the control of air inhaled compressor is to ensure that the system need air pressure.
在对空压机要求不高的情况下，一般采用调制式控制，即通过控制压缩机吸入空气的量来保证系统所需要的空气压力。
Adaptive coded modulation has become one of the key techniques in high speed wireless data communications.
自适应编码调制技术已成为高速无线数据通信的一项关键技术。
If the modulation rate is high, it is possible to smooth out the pulse train using passive electronic filters and recover an average analog wave form.
如果调制率高，是有可能顺利进行，脉冲列车使用被动电子过滤器和收回平均模拟波形。
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。
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 simulation results show that the proposed algorithm improved the throughput more obvious than any single modulation and coding scheme whether under high or low SNR conditions.
仿真结果表明：无论在高信噪比还是在低信噪比条件下，自适应算法均比单一的编码调制方案吞吐量有明显的提升。
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。
The high frequency modulation characteristics of GaAs-GaAlAs DH LBDs are analyzed and the results (data and curves) presented.
分析了器件的两种高频调制特性，给出了测量结果——数据和曲线。
The LED system shall be digitally driven using high-speed pulse width modulation (PWM).
LED系统应采用高速脉宽调制(PWM)数字式地驱动。
High Alphabet modulation is a new modulation method, which is very suitable for safety remote control aboard missile, launch vehicle, manned or unmanned spacecraft, etc.
主字母调制技术是一种新颖的调制方式，非常适合于导弹、运载火箭以及载人和不载人飞船的安全遥控。
The sample-time-staggered space vector modulation (STS-SVM) is a novel modulation strategy with high performance.
错时采样空间矢量调制（STS-SVM）技术是一种高品质的新型调制技术。
This paper discusses adaptive modulation techniques for TDMA high capacity wireless TDMA communications systems.
讨论宽带无线tdma系统中采用的自适应调制技术。
It plans to launch a hard X-ray modulation telescope to study the matter dynamics and high-energy radiation processes in the strong gravitational field of compact celestial bodies and black holes.
发射硬x射线调制望远镜，研究致密天体和黑洞强引力场中物质动力学和高能辐射过程。
The analog part mainly includes power source, power control, signal generation, signal modulation, high voltage output control and feedback control circuit.
模拟部分主要包括电源、功率控制、信号产生、信号调制、高压输出控制和反馈控制电路。
A novel topologic structure of high frequency AC pulse density modulation converter is proposed, and its operation principle, control scheme and design are described in detail.
提出了一种新颖的高频交流脉冲密度调制变频器的拓扑结构，并详细阐述了工作原理、控制方案和设计方法。
High electron mobility transistors (HEMT) is one of field effect transistors, which is made by modulation doped heterostructure technology and possess super high electron mobility.
高电子迁移率晶体管(HEMT)是利用异质结和调制掺杂技术制成的具有超高迁移率的场效应晶体管。
This thesis introduces a series of low cost high precision Linear Frequency Modulation Continuous Wave (LFMCW) ranging radar.
本文介绍一种低成本、高精度线性调频连续波(LFMCW)测距雷达。
The phenomenon that the effect of the high frequency modulation is better than that of the low frequency modulation is explained, and general rules of choosing modulator parameters are also presented.
解释了高频调制效果比低频调制好的实验现象，并且给出了确定调制器参数的一般原则。
The small signal analysis for high frequency modulation characteristics of specific wavelength laser diode with narrowband filter was presented.
采用窄带滤光片作为选频元件对精确波长激光器高频调制特性进行了小信号分析。
As the core mobile communications technology, one of the digital modulation technique is to achieve high-speed, highly efficient mobile communication system and an important guarantee.
而作为移动通信核心技术之一的数字调制技术是实现高速、高效的移动通信系统的重要保证。
The results show that digital modulation is with high resolution, total digitalization programmable, and low phase noise etc.
结果表明，数字调制具有分辨率高、全数字化可编程、相位噪声低等特点。
The results show that digital modulation is with high resolution, total digitalization programmable, and low phase noise etc.
结果表明，数字调制具有分辨率高、全数字化可编程、相位噪声低等特点。
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