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- 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。
- 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;
- 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。
- 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。
- This method is used for the processing and identifying experiments on four classes of real test and for emulating targets’ ISAR imaging data, and the clearly better and robust result is obtained. 应用该方法分别对四类实测和仿真目标的ISAR成像数据进行了处理和识别实验,所得结果明显优于单一极化状态下的正确识别率,且鲁棒性更高。
- In chapter IV,the characteristic of spin target"s one-dimension range-profile and the influence which bring to ISAR imaging is reached.Then corresponding compensation method is brought forward. 第四章研究了自旋运动目标一维距离像的特点以及对ISAR成像的影响,提出了相应的补偿方法。
- 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。
- Research on ISAR Imaging of Multiple Moving Targets 多运动目标ISAR成像方法研究