多普勒调频斜率,doppler rate
1)doppler rate多普勒调频斜率
1.Errors caused by the aircraft motion and orientation lead to the errors of the Doppler centroid and Doppler rate,thus some significant distortions appear in images.针对真实飞行条件下飞机运动和定位误差导致多普勒中心频率和多普勒调频斜率误差,从而使图像出现大的变形的特点,提出了真实飞行条件下估计接收数据多普勒中心频率和多普勒调频斜率的新方法。
2.A new method for estimating the Doppler rate in synthetic aperture radar (SAR) imaging is presented based on the four-parameter Chirplet decomposition of the signal in a range bin.提出了基于一个距离门信号的四参数 Chirplet分解方法 ,估计合成孔径雷达 ( SAR)回波的多普勒调频斜率。
3.This paper analyzes the relation between the Doppler rate and phase gradient,and proposes algorithm for the Doppler rate estimation with the PGA,then the performance of this algorithm is verified by the computer simulation data and airborne SAR data.本文详细地分析了多普勒调频斜率误差与相位梯度的关系 ,提出了基于PGA的多普勒调频斜率估计算法 ,并进行了仿真和机载SAR数据的成像实验 。
2)Doppler frequency rate多普勒调频斜率
1.This paper estimates Doppler centroid using the averaged azimuth spectrum, and it estimates theDoppler frequency rate by computing the shift between subimages.根据平均后的方位谱来估计多普勒中心频率,通过计算子图像之间的位移值来估计多普勒调频斜率。
3)Doppler rate estimation多普勒调频斜率估计
4)doppler frequency rate多普勒调频率
1.The Estimation of spaceborne SAR Doppler frequency rate is studied.估计星载合成孔径雷达 ( SAR)的多普勒调频率 ,建立星载 SAR方位向信号相位的多项式模型 。
2.This paper discusses the effects on spaceborne synthetic aperture radar(SAR) imaging quality resulting from errors in the Doppler parameters used in imaging processing,and proposes a new method called Autofocus estimation method to estimate Doppler centroid and Doppler frequency rate with the cross-correlations of the first-look and the fourth-look subimag- ings in range and azimuth respectively.主要分析了星载合成孔径雷达(SAR)多普勒参数的估计误差对成像质量的影响,提出了利用自聚焦同时估计多普勒质心和多普勒调频率的方法;该方法使得两个多普勒参数的估计在准均匀和非均匀场景下能同时具有较高的精度,而且使估计的运算量也大为减少;最后通过星载 SEASAT-A海洋卫星原始数据成像试验,证明了该方法的优越性。
3.In airborne synthetic aperture radar, accuracy of the Doppler frequency rate affects the image quality directly.在传统单站机载合成孔径雷达(SAR)中,多普勒调频率的估计精度直接影响着成像的质量。
英文短句/例句
1.Doppler Frequency Estimation of High-resolution SAR Based on DSP基于DSP的高分辨SAR多普勒调频率的估算
2.The proposed method may estimate Doppler rate robustly in the case of low SNR.在信噪比较低的条件下此方法可以稳健地估计多普勒调频率。
3.A Doppler rate estimation method based on sub-space projection technique was proposed.提出了一种基于子空间投影技术的多普勒调频率估计方法。
4.Modulation-Free Laser Frequency Locking by AOM Shifted Cesium Sub-Doppler Spectra声光偏频亚多普勒光谱无调制激光频率锁定
5.Influence of Doppler Effect and Frequency Tolerance to Train Dispatching Radio System多普勒效应与频率容差对无线列调的影响
6.The doppler frequency is a function of the two scattering directions.多普勒频率是两个散射方向的函数。
7.Doppler Frequency Compensation of Vehicular MTD Search Radar车载MTD搜索雷达多普勒频率补偿方法
8.Frequency Estimation Algorithm of Laser Doppler Signal一种激光多普勒信号的频率估计算法
9.Estimation on doppler center of triangle FMCW radar三角调频连续波雷达多普勒中心估计
10.Demodulate Method of BPSK Signal With Doppler Shift一种含多普勒频移BPSK信号的解调方法
11.The Doppler frequency can be obtained as a heterodyne or beat effect.由于外差或频差效应，能够得到多普勒频率。
12.Research of Passive Location on the Basis of Doppler Changing Rate;基于多普勒频率变化率的无源定位技术研究
13.Performance Analysis of Frequency Modulation Ranging for High-PRF PD Radar脉冲多普勒雷达的高重频调频测距性能分析
14.Effect of Doppler Frequency Shift on Linear Frequency Modulation Signal Pulse Compression多普勒频移对线性调频信号脉冲压缩的影响
15.Difference between Doppler Frequency and Azimuth Frequency and Its Influence on the Azimuth Resolution of Spaceborne SAR星载SAR方位向频率与多普勒频率的差异及其对成像分辨率的影响
16.FM/AM Noise Test Set for a Pulsed Radar用于脉冲多普勒雷达的调频/调幅噪声测试设备
17.Application of Doppler Frequency Compensation Algorithm in Acquisition of GPS Signals多普勒频率补偿算法在GPS信号捕获中的应用
18.A New Fast-time Doppler Effect Compensation Method Applied to Step Frequency SAR System步进频率SAR快时间多普勒效应补偿新方法
相关短句/例句
Doppler frequency rate多普勒调频斜率
1.This paper estimates Doppler centroid using the averaged azimuth spectrum, and it estimates theDoppler frequency rate by computing the shift between subimages.根据平均后的方位谱来估计多普勒中心频率,通过计算子图像之间的位移值来估计多普勒调频斜率。
3)Doppler rate estimation多普勒调频斜率估计
4)doppler frequency rate多普勒调频率
1.The Estimation of spaceborne SAR Doppler frequency rate is studied.估计星载合成孔径雷达 ( SAR)的多普勒调频率 ,建立星载 SAR方位向信号相位的多项式模型 。
2.This paper discusses the effects on spaceborne synthetic aperture radar(SAR) imaging quality resulting from errors in the Doppler parameters used in imaging processing,and proposes a new method called Autofocus estimation method to estimate Doppler centroid and Doppler frequency rate with the cross-correlations of the first-look and the fourth-look subimag- ings in range and azimuth respectively.主要分析了星载合成孔径雷达(SAR)多普勒参数的估计误差对成像质量的影响,提出了利用自聚焦同时估计多普勒质心和多普勒调频率的方法;该方法使得两个多普勒参数的估计在准均匀和非均匀场景下能同时具有较高的精度,而且使估计的运算量也大为减少;最后通过星载 SEASAT-A海洋卫星原始数据成像试验,证明了该方法的优越性。
3.In airborne synthetic aperture radar, accuracy of the Doppler frequency rate affects the image quality directly.在传统单站机载合成孔径雷达(SAR)中,多普勒调频率的估计精度直接影响着成像的质量。
5)Doppler rate多普勒调频率
1.The motion parameters are computerized from the estimatedDoppler rates which are distributed along the range according to the motion of the phase center.提出了基于多普勒调频率的机载条带SAR运动补偿方法。
6)Doppler frequency modulating多普勒调频
延伸阅读
调频-调频遥测系统采用调频-调频二重调制方式的频分制遥测系统,简称FM-FM遥测系统，属于模拟式遥测系统。FM-FM遥测系统的抗干扰能力强，遥测精度也比较容易得到保证。模拟式遥测系统大都采用这一类系统。下图为 FM-FM遥测系统的框图。各路被测量经变换器变换成电压信号后去控制各路副载波振荡器。副载波振荡器一般采用压控振荡器（即电压控制的振荡器），其振荡频率正比于控制电压,这样就实现了第一次调频。为了防止路际干扰,各路已调副载波先通过低通滤波器，滤去高次谐波，再送到相加放大器形成多路信号，并通过信道调制器对载波调频，这样就实现了第二次调频。已调频的载波由发射天线发送出去。接收端收到遥测信号后先通过解调器解调出多路信号，再送往各分路的带通滤波器，即分路滤波器，把各路已调副载波分离开来。分离出来的已调副载波送到相应的分路解调器，进行第二次解调，就可以得到所传送的模拟信号。美国对 FM-FM遥测系统已经实现了标准化、模块化、系列化。广泛应用模拟集成电路制成标准部件，提高了系统的可靠性和适应性。
