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- instantaneous ISAR image 逆合成孔径雷达瞬时成像
- ISAR image is achieved by two methods of ISAR image combination for LMFS. 提出了两种形成延展目标ISAR像的拼接方法;
- It makes the ISAR image clearer, and also provides some information of the rotating parts, such as the radius and the rotation frequency. 通过对微多普勒信息的分析，同时也能获得旋转部件的一些运动信息，如旋转半径、旋转频率等。
- A method of understanding and processing ISAR image is presented, which is based on the time-frequency analysis algorithm - improved Adaptive Guassian Representation(AGR). 文中提出一种基于改进的自适应高斯表示(AGR)的ISAR图像理解与处理方法。
- The estimation of rotation angle is the precondition for ISAR imaging. ISAR成像中的转角估计是进行正确成像的先决条件。
- Motion compensation,which usually includes range alignment and phase compensation,plays a key role in ISAR imaging. 运动补偿是ISAR成像中的关键技术,通常包括包络对齐和相位补偿,而包络对齐是相位补偿的基础。
- Range-Instantaneous-Doppler(RID) algorithm should be used in ISAR imaging when the object is maneuvering. ISAR成像的目标通常为非合作机动目标，采用距离瞬时多普勒方法可以对机动飞行目标进行成像[1]。
- But research on ISAR imaging for ship, which is also very important in national defense, is very little. 对水面舰船的雷达成像在国防上同样有重要意义,但国内对舰船的ISAR成像的研究,基本上为空白状态。
- This paper establishes an emulation model of ISAR system after analyzing the principle of ISAR imaging, and then studies on several ECM techniques. 本文分析了ISAR成像原理,建立了ISAR系统的仿真模型,并在此基础上对几种干扰技术进行了仿真。
- Due to their low accuracy or low efficiency, the conventional range alignment algorithms can't satisfy the requirements of real-time ISAR imaging. 传统的距高对齐算法或对齐精度不够高，或运算效率过低，无法满足ISAR实时成像的要求。
- Based on the properties of wavelet transformation and Mahalanobis distance,a method of ISAR imaging processing and classification is proposed. 基于小波变换和马氏距离的性质,提出了目标ISAR成像的处理与分类方法。
- Based on non-Gaussian AR-model, parametric bi-spectrum method is used to extrapolate radar echo signal; then the ISAR imaging has been done. 利用双谱分析方法,用非高斯AR模型对雷达目标回波信号进行参数化双谱估计,并在此基础上对数据进行外推处理,然后对数据进行ISAR成像。
- So the novel algorithm achieves a good balance between the efficiency and the accuracy.It is suitable for real time ISAR imaging. 这说明新算法在效率和性能上达到了良好的平衡，适合于ISAR实时成像。
- In this paper, by combining wavelet transform and Mahalanobis range, a feature extraction method of radar target using ISAR Imaging is presented. 将小波变换和马氏距离相结合,提出了一种基于ISAR成像的雷达目标特征提取方法。
- A novel method for high speed moving targets ISAR imaging based on ‘moving’ reference dechirp signal is presented in this paper. 针对高速目标的ISAR成像问题，该文提出基于“运动”参考解调频的运动补偿方法。
- Combination of the SVA and time-frequency analysis in ISAR imaging of the maneuvering target is proposed to improve imaging quality of the traditional RD algorithm. 在此基础上，提出将两者联合运用到机动目标的逆合成孔径雷达成像中，改善了传统的距离-多普勒算法对机动目标成像的模糊现象。
- Death is instantaneous in a fatal accident. 在致命的事故中，死亡是即刻发生的。
- Based on AGCD, an Optimized Initial-a-adaptive Gaussian chirplet signal decomposition algorithm (OI-AGCD) is proposed, and then be applied to ISAR imaging of maneuvering target. 该文在高斯包络线性调频基的自适应信号分解算法基础上，提出了基于优化初值选择高斯包络线性调频基自适应信号分解算法，并将其应用到ISAR成像中。
- And then the ISAR imaging character of this kind of target is analyzed.According to this analysis, a method for ISAR imaging projection plane calculation is introduced. 仿真实验同时验证高速运动自旋目标ISAR投影像计算方法和ISAR成像处理算法的有效性。
- The reaction of the audience was instantaneous. 观众即刻有了反应。
