• The maximum Doppler shift in some typical non-GEO satellite channels are figured out.

    计算出了几种典型静止轨道卫星信道大多普勒频移

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  • So by timing the pulses of the x-rays, you can get a handle on the Doppler shift of the neutron star.

    可以运用,中子星,多普勒顿意味着可以得到

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  • Time-selective Rayleigh fading of channels is caused by Doppler shift and carrier frequency offset.

    接收端的高速运动或者载频偏移,会引起信道时间选择性衰落

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  • Using this method, the synchronized PN code phase and approximation value of Doppler shift are got.

    捕获方法捕获到同步长周期伪同时得到了多普勒频偏近似值

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  • Thus, the Doppler shift compensation is implemented only or mainly in good enough channel conditions.

    因此可以主要信道状况足够好的情况下才进行频移补偿

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  • And so you get all this useful information in astronomy by making the Doppler shift measurements of binary systems.

    你们可以得到所有天文学中的有用信息,只要对双星系统进行多普勒顿

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  • Experimental results show that this method has advantages in achieving the Doppler shift of the satellite tracking.

    实验表明方法实现卫星多普勒频偏跟踪具有更大的优越性

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  • The formulas of Doppler shift due to the reflected signal and that travelling through the ionosphere are thus derived.

    此基础得到电离层反射信号勒频公式以及穿过电离层的信号的多普勒频移公式。

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  • All this comes out of Doppler shift measurements: the velocities, the radii, the periods and even the masses of these objects.

    测量法得到,速度半径:,周期以及这些物体质量,如果作为观察者。

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  • A similar effect, called the Doppler shift, causes the siren of an approaching ambulance to apparently change pitch as it passes you.

    是一种类似的多普勒频移效应就像救护车你面前驶过时,会促使逐渐靠近警报器明显地改变其音调那样。

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  • DTMF has perfect anti-interference and some anti-Doppler shift ability and is widely used for low rate communication in audio channel.

    DT MF信号具有优良的抗干扰性能一定的抗多普勒频能力广泛应用于语音信道低速数据通信。

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  • But both of them are sensitive to carrier frequency shift, further, they have comparative BER under AWGN and Doppler shift environment.

    两者载波频率偏移敏感,且在AWGN多普勒环境表现相当。

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  • Doppler shift is unavoidable in underwater acoustic communications because of relative moving between the transmitter and the receiver.

    水声通信中,由于发射接收平台之间相对运动多普勒频移无法避免的。

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  • A general formula of relativistic Doppler shift is obtained from Lorentz transformation, and the supersonic motion is discussed as well.

    利用洛伦兹变换导出了相对论多普勒普遍公式并且讨论了波源超音速运动情况。

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  • There is provided a Doppler type ultrasonic flowmeter (1) for measuring a flow rate of a fluid (10) by using an ultrasonic Doppler shift.

    提供了一种通过利用超声波测量流体(10)流速的多普勒超声波流量计(1)。

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  • Electrophoretic mobility is determined from Doppler shift by using a non-invasive and quick technique called Electrophoretic Light Scattering.

    电泳迁移率确定多普勒使用侵入性快速技术称为电泳散射。

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  • In this paper, with Rayleigh fading the random characteristics of multipath time delay and Doppler shift in HF ionospheric channels is discussed.

    本文利衰落模型下,研究了高频电离层信道多径时延多普勒频移随机特性

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  • High dynamic environment may cause a large Doppler shift, thus the general GPS receiver is difficult to work reliably without outside assistance.

    动态环境造成较大多普勒频移,这使得一般GPS接收机没有外界辅助的情况下难以可靠工作

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  • In the satellite navigation and positioning system, Doppler shift is one of the key problems that may degrade the performance of the satellite receiver.

    卫星导航定位系统中,多普勒频率偏移影响接收机性能关键因素之一

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  • If you have a binary system whereby both stars are visible so you get the spectrum of both stars, then you see the Doppler shift of both stars in the spectrum.

    存在一个双星系统恒星看不见能得到双星光谱然后在光谱看到双星多普勒顿

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  • A biological recognition method by feature detection of human body on the move was presented, and the mathematical model of Doppler shift was established.

    根据生物生命体行为特征提出种新的生物识别方法建立多普勒频移数学模型

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  • So now we have a situation that I just described earlier that you have the Doppler shift of both objects, and remember, I told you that you also get the masses.

    正如早先形容过我们知道二者多普勒顿记住你们知道,物质质量得到供体星

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  • 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.

    报道了在原子波谱多普勒频移随微波慢波系数变化,并讨论产生这种现象的原因

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  • Compared with normal mobile communications environment, the most prominent problem of high mobility environment is the impact of Doppler shift on communication.

    普通移动通信环境相比高速移动环境突出问题多普勒频移通信产生影响

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  • This paper has discussed the way of probing Doppler shift signal based on crossed phase detecting method in detail and introduced each function circuits briefly.

    本文详细论述依据正交相位检测法提取多普勒频移信号方法部分实现电路作一简要的介绍

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  • By calculating the Doppler shift and its uncertainty in the signal covering area, the relation between Doppler shift and the position of the receiver is obtained.

    通过对地面卫星信号覆盖区内频率偏移确定性范围的计算,给出了卫星导航系统信号的多普勒频率偏移接收机位置之间关系。

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  • The channel of LEO satellite is different from wireless channels on the ground. Low SNR and large Doppler shift are the two characteristic of LEO satellite channel.

    低轨卫星信道地面无线信道具有不同特点信噪比大多频移低轨卫星信道的两个显著特征。

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  • The acquisition performance of the system had been analyzed in detail with phase error of PN sequences, Doppler shift and background noise taken into consideration.

    综合考虑相位误差多普勒频移噪声干扰基础上,详细分析了系统捕获性能

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  • Electromagnetic waves are applied to a patient blood vessel and the reflected electromagnetic waves are analyzed for a Doppler shift, which is indicative of a pulse.

    电磁波施加患者血管并且分析反射电磁波偏移述多普勒偏移表明存在脉搏

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  • Electromagnetic waves are applied to a patient blood vessel and the reflected electromagnetic waves are analyzed for a Doppler shift, which is indicative of a pulse.

    电磁波施加患者血管并且分析反射电磁波偏移述多普勒偏移表明存在脉搏

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