modulation envelope
英 [ˌmɒdjʊˈleɪʃən ˈenvələʊp]
美 [ˌmɑdʒəˈleɪʃən ˈenvəloʊp]
调制包络线
双语例句
- Evidently, there is another motion to be concerned with and that is the propagation of the modulation envelope.
显然，还应当考虑另外一种运动，那就是调制包络的传播。 - Commonly used in communications systems modulation, including satellite commonly used constant envelope modulation: SOQPSK and MUQPSK.
说明：实现通信系统中常用的调制方式，包括卫星常用的恒包络调制：SOQPSK和MUQPSK。 - Research on shipboard radar anti noise frequency modulation jamming based on envelope filtering
基于包络滤波的舰载雷达抗噪声调频干扰研究 - And a theoretical model is established to expound the variation of pulse duration and the modulation on the pulse envelope similar to the diffraction characteristics in spatial domain.
通过与光束的空间传输特性类比解析了光栏宽度变化引起的脉宽变化以及脉冲轮廓出现时间衍射调制现象； - In this dissertation, we make a deep research on the sub-set modulation recognition of the complex modulated signal MPSK 、 MQAM and the constant envelope signal OQPSK 、 π/ 4 QPSK 、 MSK.
本文深入研究了复杂调制信号MPSK、MQAM的信号子类以及常用恒包络信号OQPSK、π／4QPSK、MSK的调制识别技术。 - A Kind of Use of Pulse modulation& Envelope Detector Self-locking System
一种脉冲调制&峰值检波器自锁系统的应用 - In automatic classification of digital modulation signal, computing envelope variance after difference has important meaning to distinguish PSK and FSK signal.
在数字信号的自动调制方式识别中，差分后求包络方差对于区分FSK、PSK信号具有十分重要的意义。 - The modulation characteristic of Feher and Kato ′ s patented Quadrature Phase Shift Keying ( FQPSK-KF) is studied, including theoretic analysis of its envelope trait and computation of its power spectral density ( PSD).
研究了FQPSK-KF的调制特性，理论推导了其包络特性，仿真计算了其功率谱密度（PSD），并与一些常见调制方式进行了比较； - In this approach, the characteristic high-frequency signal with amplitude modulation of a rolling bearing with local damage is separated from the mechanical vibration signal as an Intrinsic Mode Function ( IMF) by using EMD, and an envelope signal can be obtained by using Hilbert transform.
这种方法中，局部损伤滚动轴承产生的高频调幅信号成分被EMD分解作为本征模函数分离出来，然后用Hilbert变换得到其包络信号，计算包络谱，就能够提取滚动轴承故障特征频率。 - Continuous-phase modulation ( CPM) signal is a kind of constant envelope, continuous changed phase signal.
连续相位调制（CPM）信号是一类包络恒定、相位连续变化的调制信号。 - Especially in model wireless communication system, with the development of digital modulation technology, the system is very sensitive to the linearity characteristic of the PA ( power amplifier) due to using the non-constant envelope signal.
特别是在现代无线通信系统中，随着数字调制技术的发展，调制技术多采用非恒定包络信号，它对功率放大器的线性特征非常敏感，这样对功率放大器的线性度提出了新的要求。 - The signal generated by constant envelope modulation technology has constant envelope, which has good performance on fully using satellite resource, when the high-power amplifier is working on the non-linear amplify state.
恒包络调制所产生的信号具有恒定包络，能够工作在高功率放大器的非线性放大区，充分利用卫星转发器的资源，因此，恒包络调制已在卫星通信领域得到广泛的应用。 - OQPSK ( Offset Quadrature Phase Shift Keying) modulation technology is a constant envelope modulation technology, which possesses the features of high spectrum and power utilization ratio. The modern method has been widely employed in satellite communication system and mobile communication system.
偏移正交相移键控（OQPSK：OffsetQuadraturePhaseShiftKeying）是一种恒包络调制技术，具有较高的频谱利用率和功率利用率，广泛应用于卫星通信系统和地面移动通信系统。 - High spectral efficiency digital modulation technique was used to improve the spectrum efficiency, but it produced a non-constant envelope signal which required a higher linearity of the power amplifier.
高频谱效率数字调制技术的使用提高了频谱利用率，但是它产生的非恒包络信号对功率放大器的线性度提出了更高的要求。 - Deep analysis has been made in the line spectrum modeling of the ship noise, continuous spectrum modeling, and modulation envelope modeling.
深入分析舰船噪声的线谱建模、连续谱建模以及调制包络建模。 - Most of the modern modulation techniques are jin use of a non-constant envelope modulation, which has a large difference between peak and average.
大多数的现代的调制技术都运用了非恒包络调制方式，并且峰值和平均值相差较大。 - Constant envelope modulation technique with its constant envelope advantage has been widely used in the traditional wireless communication systems, at the same time, it has a good effect on the inhibition of nonlinear effects, carrier frequency offset and phase noise in optical communication system.
恒包络调制技术以其包络恒定的优势已在传统的无线通信系统中得到了广泛的应用，同时其在光通信中对抑制光纤非线性效应、载波频偏和相位噪声具有良好的效果。 - Similarly, as a way of continuous phase modulation with constant envelope, GMSK ( gaussian minimum frequency shift keying) has good spectrum characteristics and ber performance.
同样，GMSK（高斯最小移频键控）作为一种恒包络连续相位调制方式，它有着优良的频谱特性和误码性能。 - Compared with in vitro AM modulation modes, the demodulator adopts the diode peak envelope detector for demodulation.
相对于体外的AM调制方式，解调器采用二极管峰值包络检波进行解调。 - The modulation phenomenon of gear box vibration was studied, with the method of hilbert envelope demodulation; the fault feature of gear box was effectively extracted.
研究了齿轮箱振动调制现象，利用Hilbert包络解调方法有效的实现了齿轮箱故障特征提取。 - For the inter-class recognition of modulation signals, a method using the signal envelope variance and frequency variance after wavelet transform is proposed for inter-class classification of MQAM, MFSK and MPSK signals.
对于类间识别，提出了利用信号包络方差和信号小波变换后的频率方差对MQAM、MFSK和MPSK信号进行类间识别。 - Compared with other modulation techniques, the Constant Envelope and Quasi-constant Envelope Modulation& Demodulation technologies are insensitive to the non-linear characteristic of the power amplifier because of the constant envelope.
恒定及准恒定包络调制技术与其它调制技术相比，由于包络恒定，对功放的非线性特性不敏感。 - LTE system adopts OFDM as the modulation mode, which is an inconstant envelope modulation; and so on impose higher requirements on the linearity of power amplifiers.
LTE系统中下行方案采用了非恒定包络调制方式的正交频分复用技术，该技术对功率放大器的线性度有很高的要求。