多普勒频移

Laser Doppler Velocimeter:the two times Dopper effect for the scattered light from the tracing particle, the formula of LDV, laser heterodynes measurement, dual beam differential mode, LDV signal processing, frequency shift technique and application, multi-dimension velocity measurement, LDV application while light is refracted.

三。 激光多普勒测速：运动粒子中散射光的二次多普勒效应（1），LDV基本公式(1)，光外差检测技术及其实现(1)，双光束差动模式(1)，LDV信号处理(3)，频移技术及其应用(5)，多维速度的测量(5)，有折射现象时LDV的应用(3)，LDV测量实例(1)。 LDV实验一：LDV光路实验（3） LDV实验二：LDV测水流场实验（3）四。

In addition, a model is formulated for Doppler spectral shift of the coupling field, and the characteristic of the Doppler spectrum of the composite backscattering field is analyzed in detail.

另外，本文还推导出了耦合散射场多普勒谱频移的理论公式，详细分析了复合后向散射场的Doppler 频谱特性。

A new three-dimensional laser Doppler velocimeter (3D LDV) by only using frequency shift separation method has been developed.

研究一种采用频移分离方法的新型三维激光多普勒测速仪(3DLDV)。

A software HF channel simulator based on Watterson model was presented according to the characters of multipath, fading, Doppler frequency shift and Doppler frequency spread in HF channel.

对短波信道多径、衰落、多普勒频移及扩展等现象进行了分析，并且基于Watterson离散信道模型，设计了一种全软件的短波信道模拟器，为短波通信系统性能测试提供了条件。

In this paper,the effect of time-delay and Doppler frequency in acquisition of PN code is analyzed, using maximal-length shift register sequence as research object. It is shown that delay-Doppler cross effect is neglectable in most cases.

以m序列为研究对象，首先针对一种典型的相关过程分析了其时延、多普勒频移对相关的联合影响，结论表明两者耦合影响非常小，几乎可忽略不计。

In terms of different modulation metho...

在不同的信道环境中，分别针对不同的调制方式和不同的多普勒频移对NC-OFDM和OFDM系统的误码性能进行仿真比较。

A refined frequency scaling algorithm was deduced,which was suitable for airborne SAIL in stripmap model and was taking the Doppler shift term into account.

推导出在该模型下一种适用于机载合成孔径成像激光雷达系统的频率变标算法，一并考虑了在连续波信号模型中多普勒频移项对成像的影响。

In this thesis, Microwave Doppler radar has been applied to detect vital signs.

本文运用微波多普勒频移的原理实现了生命特征信号的非接触式探测。

By comparing the spectra obtained from two different slow-wave structures, we get the conclusion that Doppler shift of an atom in slow-wave field varies with sin of the pitch angle of the helix structures.

通过比较两种不同几何尺寸的慢波结构产生的场与原子束作用得到的微波谱，得出了在螺线管结构的慢波场中，原子的多普勒频移随螺距角的正弦减小而增大的结论。

The factors that may hamper the recycling, the split of atomic levels due to Zeeman effect and the increase of Doppler shift in a slow-wave field, are analyzed and the possible ways to solve them are suggested.

并就当前阻碍实验顺利进行的磁场中基态能级塞曼分裂和慢波引起的多普勒频移的增大等因素进行了分析，提出了解决问题的可能途径。

Life. But the intrinsic way of the Internet by wire confines accessing and using of the network information.

然而，Internet固有的有线连接方式大大限制了人们对网络信息的访问和使用。

I have a strong persuasion that this is true .

我坚信这是正确的。