论述了各种同步误差的来源,分析了引入各种同步误差后对回波相位的影响;
The sources of variant synchronization errors are discussed, the analysis of echo phase effected by variant errors is given.
本文报道了一种基于脉冲回波相位谱的超声波速度测量方法,并给出了它的详细理论推导过程。
This paper presents the development of a pulse-echo measurement method, based on the use of a phase spectrum to determine the ultrasonic wave velocity. A detailed descripsion of the theory is given.
利用电离层垂直探测中的组合脉冲控制和回波相位测量分析方法,开发并实现了一种电离层扰动观测模式。
This paper presents and realizes an ionospheric disturbance observation mode by using combinational pulses control and echo's phase measurement analysis in ionospheric vertical sounding.
论文针对L波段ISAR,通过四个数学模型仿真了电离层引起的目标回波相位起伏、折射效应以及回波幅度闪烁对ISAR图像的影响。
This paper gives four models to simulate effects of phase fluctuation, refraction and amplitude scintillation due to ionosphere on L-band ISAR.
文中以脉冲雷达回波信号和相位码信号为例。
Phase coded signal and the pulse radar echo have been simulated.
SPGA算法利用估计得到的侧摆对距离徙动校正前的回波数据进行包络和相位补偿。
SPGA algorithm compensates the envelope and phase of the echo signal which has not be corrected range migration.
基于雷达回波信号的PGA算法是在时域估计和校正系统相位误差的一种方法,算法较简单。
PGA algorithm based on radar echo signal is one method of estimating and correcting phase error in time domain, and its algorithm is simple to use.
利用等效相位中心原理建立了天线斜置情况下三通道运动目标回波信号模型,给出了天线倾斜角对动目标检测、最小可检测速度和盲速的影响。
The echo model of moving target is established based on three channels with the slant-placed antennae in terms of the equivalent phase center principle.
本文介绍了一种利用雷达回波幅度信号频谱相位信息进行角度超分辨的方法。
A method which makes use of the phase information of spectrum of radar echo amplitude signal to make azimuth super resolution is given.
并且讨论了在脉冲多普勒相参体制雷达下目标回波的相位信息以及目标信号的多普勒谱特性。
Then discussing the phase information and Doppler characteristic of target echo wave in the pulse Doppler phase radar.
在深入分析目标极化回波的基础上,针对互易性目标,提出了一种基于交叉极化分量相位对齐的散射矩阵校准方法。
A method of measuring and calibration based on aligning the phase of the cross-polarization of the scattering matrix is proposed.
这些信号分别为模拟回波信号的生成提供了天线增益大小、时间基准、相位基准和载波频率大小等重要的参考信息。
These signals provide an important reference of the gain of antenna, the time reference, the phase reference and the frequency of carrier wave for generating stimulant echo signal.
在红外激光测距中,一般是通过测量发射连续激光脉冲和被测目标回波信号的相位差而求得被测距离的。
We obtain the distance by measuring the difference of the phase between the continuous laser signal transmitted and the signal reflected by the object in the infrared rays distance measure.
针对逆合成孔径雷达(ISAR)的小转角目标回波特点,提出通过快速生成包络和相位的方法来构成目标回波。
To consider the echoes' characteristic of the moving target with small angle for inverse synthetic radar (ISAR), the target's echoes are simulated by generating the envelope and phase quickly.
然后,通过在频域引入一个相位斜坡来实现回波在距离向上的平移。
Then, the echo is shifted by introducing a phase ramp in the frequency domain.
正弦调制相位信号是微动目标雷达回波微多普勒信号的一般形式。
Signals with sinusoid modulated phase is the general form of micro-Doppler signals in radar echoes from targets with micro-motions.
距离对准是要将同一散射点在各个不同回波中的样值对准到同一距离门中,相位校正是要将雷达和目标之间的平动多普勒相位从各个回波中移除。
This thesis is aimed towards a research of the technologies of translation compensation. It consists of range alignment and phase adjustment. There are many methods of translation compensation.
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.
由于多点回波叠加,叠掩区域的相位并不准确,而且在相位解缠中影响判别,因此对叠掩区域进行识别具有重要意义。
The interferometric phase of layover region is not accurate due to the superposition of multi-echo, it makes the discrimination difficult in phase unwrapping.
讨论了噪声对补偿的影响,提出了用回波数据拟合曲线来光滑质心距离轨迹和相位轨迹的方法。
The noise effect on the motion compensation is discussed. To solve the problem, a new method 'which USES echo goodness-of-fit curve to smooth the centroid range trace and phase trace is proposed.
在激光雷达探测中,关于多次散射雷达回波的研究,散射相位函数是个非常重要的物理量。
Scattering phase function is a very important physical parameter in lidar detection of multiple scattering returns.
该方法通过对截获的雷达发射信号在慢时间域进行正弦相位调制,得到了等效微动点的回波信号。
In this method, the echo of the synthesized equivalent micro-motion point is obtained by modulating the phase of intercepted radar signal with sinusoid in the slow time.
以往的目标检测都是在视频信号上进行的,它只对回波幅度进行检测,而丢掉了信号的相位和频率的信息。
Usually the radar video signal is used to detect, but it only utilizes the amplitude of the signals and lost the information of phase and frequency of radar signals.
然后对窄带雷达回波采样序列进行相位匹配变换,搜索匹配函数的最大值,从而得到质心位置参数的估计值。
The phase matching transform is performed on the sample series. of narrow-band radar echo, and the centroid position parameter is estimated by searching for the maximum value of the matching function.
脉冲压缩;线性调频信号;相位编码信号;目标回波信号;ADS;
Pulse compression; Linear frequency modulated signal; Phase encoding signal; Echo signal; ADS;
利用相位共轭极化拍频光谱术对V型三能级系统中的光子回波进行了研究。
Photon echo in polarization beat spectroscopy is studied for a V-type three-level system.
利用相位共轭极化拍频光谱术对V型三能级系统中的光子回波进行了研究。
Photon echo in polarization beat spectroscopy is studied for a V-type three-level system.
应用推荐