研究表明:被俘获的信号脉冲能产生频移。
Results show that the trapping pulse generates frequency shift.
状态方程综合考虑了多普勒频移、定时误差。
Doppler frequency drift and timing error were considered in state transform equations.
以二聚体模型解释了反斯托克斯荧光频移效应。
此外,应用多普勒频移的方法,可以发现恒星的质量。
Furthermore, applying the Doppler shift method, one can find the mass of a star.
线路均衡器控制方法,积分电路,频移电路和传输装置。
Line equalizer control method, and integrating circuit, frequency shift circuit and transmission device.
借助测量水体布里渊散射的频移,可得到水体声速或温度。
The water sound speed and temperature can be calculated by measuring Brillouin scattering frequency shift.
计算出了几种典型非静止轨道卫星信道的最大多普勒频移。
The maximum Doppler shift in some typical non-GEO satellite channels are figured out.
结果表明斜光抽运方案可以有效降低铯原子束频标中的光频移。
The results show, the light frequency shift can be effectively reduced in the sharp Angle laser light pumping scheme.
频移处理是数字语音(音乐)信号处理中一项十分重要的技术。
It is an important technology to shift the frequency in digital vocal (musical) signal processing.
在复合系统通信中,飞行器的高动态使扩频信号存在多普勒频移。
In the communication of multiplex system, the DS signal exists Doppler frequency shift for the high dynamic situation of aerocraft.
在OFDM系统中,影响其性能的一个重要参数就是最大多普勒频移。
The maximum Doppler frequency shift is an important parameter which affects the performance of the OFDM system.
此项频移误差是决定铯原子喷泉频标准确度总体水平的主要因素之一。
This uncertainty is one of the critical factors governing the accuracy level of the cesium fountain frequency standard.
无线环境中存在多径衰落、多谱勒频移和信道快速时变等许多不利因素。
There are lots of disadvantages in wireless environment, such as multi-paths fading, Doppler frequency shift and fast time varying of channel.
电离层高频反射回波的多普勒频移观测是研究电离层扰动的一个重要方法。
Doppler frequency shift observation of ionospheric high frequency echo is an important method for studying ionospheric disturbances.
详细介绍NIM4铯喷泉钟系统频移及其不确定度的最新评定方法和结果。
This paper introduces the frequency deviations of NIM4 Cesium fountain clock , the method and result of a new evaluation.
多普勒频移补偿:大的多普勒频移会引起载波同步及伪码捕获性能的下降。
Doppler compensation techniques: the large Doppler frequency offset can case the performance degraded in PN and carrier synchronizing.
但两者都对载波频率偏移敏感,且在AWGN和多普勒频移环境下表现相当。
But both of them are sensitive to carrier frequency shift, further, they have comparative BER under AWGN and Doppler shift environment.
利用智利的天文望远镜,天文学家测量了三裂星云中气体的多普勒频移和速度。
By using telescopes in Chile, the astronomers measured Doppler shifts and thus velocities of gas in the Trifid.
采用边缘探测技术测量布里渊频移量的误差会对海表温度测量精度带来很大影响。
The error of measuring Brillouin frequency shift based on brim detecting technology has great influence on the measurement precision of sea surface temperature.
雷达回波信号中,除幅度、相位和多普勒频移外,还存在第四特征——极化信息。
Besides amplitude, phase and Doppler frequency, polarimetric information is the fourth characteristic in the radar echo.
针对LF M脉冲雷达的宽带回波信号的多普勒频移和时延估计问题进行了研究。
In this paper, the Doppler frequency and time-delay estimators of wideband echoes for LFM pulse radar are discussed.
在水声通信中,由于发射和接收平台之间的相对运动,多普勒频移是无法避免的。
Doppler shift is unavoidable in underwater acoustic communications because of relative moving between the transmitter and the receiver.
最后比较了上滑频滤波器、下滑频滤波器、以及无频移滤波器在抑制频率移动的性能。
Finally, a comparison about performance is made among up sliding filter, down sliding filter and none sliding filter in suppression of frequency shifting.
本文在瑞利衰落模型下,研究了高频电离层信道中多径时延与多普勒频移的随机特性。
In this paper, with Rayleigh fading the random characteristics of multipath time delay and Doppler shift in HF ionospheric channels is discussed.
研究了腔牵引效应、微波功率频移、光频移和缓冲气体温度系数对铷频标输出频率的影响。
The cavity pull effect, microwave power shift, light shift and temperature coefficient which mostly influence the performance of RAFS are studied.
结果表明,多普勒频移对共振位置有精细的影响,并且拉比频率越大多普勒频移更加明显。
It is found that doppler-shift can influence the resonant position and Dopper-shift is more obvious if Rabi frequency is larger.
由多径色散及多普勒频移造成的频率—时间选择性衰落是城市移动无线信道的一个重要特性。
The frequency time selective fading resulted from multipath dispersion and Doppler frequency shift is an important characteristic of urban mobile radio channel.
报道了在慢波场中原子波谱多普勒频移随微波慢波系数的变化,并讨论产生这种现象的原因。
We report the Doppler shift of Na spectroscopy changing with the slow wave factor in a slow wave microwave field the reason of the phenomenon is discussed.
在此基础上得到电离层反射信号的多普勒频移公式以及穿过电离层的信号的多普勒频移公式。
The formulas of Doppler shift due to the reflected signal and that travelling through the ionosphere are thus derived.
利用多普勒频移原理实现了运动目标速度测量,利用脉冲回波测距原理实现运动目标距离测量。
The speed of moving-target was measured based on the principle of PD frequency shift, and the range of moving-target on the pulse-echo principle.
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