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2022 3rd China International SAR Symposium (CISS)最新文献

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Accurate Modeling and Error Analysis of High Resolution SAR Orbits 高分辨率SAR轨道的精确建模与误差分析
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971278
Yu Yang, L. Liang, Huibo Zhang, Yixin Huang, Yang Zhao, Hao Tian
{"title":"Accurate Modeling and Error Analysis of High Resolution SAR Orbits","authors":"Yu Yang, L. Liang, Huibo Zhang, Yixin Huang, Yang Zhao, Hao Tian","doi":"10.1109/CISS57580.2022.9971278","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971278","url":null,"abstract":"This paper investigates the problem of accurate modeling and error analysis method for high-resolution SAR orbits. First, the basic model of SAR high-precision orbital dynamics is proposed. Secondly, multiple perturbation effects are established. Finally, the numerical simulation results prove the accuracy and validity of the model.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130430869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A New Layout of Wide Swath Synthetic Aperture Array 宽条合成孔径阵列的一种新布局
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971301
Siyuan Du, Feng Zhao, Xiaofei Chen, Jiakai He, Xiong Chen, Lifei Jiang
{"title":"A New Layout of Wide Swath Synthetic Aperture Array","authors":"Siyuan Du, Feng Zhao, Xiaofei Chen, Jiakai He, Xiong Chen, Lifei Jiang","doi":"10.1109/CISS57580.2022.9971301","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971301","url":null,"abstract":"In order to meet the high-resolution and highsensitivity requirements of the synthetic aperture microwave radiometer, the research on the antenna array layout technology with wide swath and low coupling is carried out. This paper focuses on the analysis of specifications such as the spatial arrangement of the array, baseline design and pointing accuracy. Based on the rectangular grid sampling arrays such as T-shaped array, cross-shaped array and square array, the layout of remote dislocation and angular rotation arrangement is adopted. The method increases the non-aliasing area, expands the imaging width, and solves the problem of aliasing in the imaging area under sampling in the spatial frequency domain. The brightness temperature image information of different frequency components can be derived from results of interferometric measurement of baselines with different lengths in the new array layout, which solves the problem of full-width imaging in one observation. The overall study is verified by numerical calculations.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130443928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research on Continuously Tunable Optical Delay Line based on Cascaded Micro-ring Resonators 基于级联微环谐振器的连续可调谐光延迟线研究
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971225
Bei Li, Yanping Wang, Jinqi Wang, Daqing Zhang, Z. Cao, Jun Cao
{"title":"Research on Continuously Tunable Optical Delay Line based on Cascaded Micro-ring Resonators","authors":"Bei Li, Yanping Wang, Jinqi Wang, Daqing Zhang, Z. Cao, Jun Cao","doi":"10.1109/CISS57580.2022.9971225","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971225","url":null,"abstract":"Optical delay line is the key component of broadband optically controlled phased array. It can overcome the inherent aperture effect and transition time limitations of traditional phased array radar technology, electronic countermeasures, all-optical signal processing and optical communication. Through the analysis of frequency response characteristics of the micro-ring, the influencing factors such as coupling coefficient, round trip loss and round-trip delay time, and their mechanism for the delay characteristics of optical micro-ring have been investigated. The Mach-Zehnder interferometer (MZI) is proposed to achieve the continuous tuning of delay time combining with the phase shifter on the ring waveguide. At the same time, the phase correction on the ring waveguide is used to balance the effect of extra phase on the frequency shift brought by the MZI coupling structure. A three-ring cascaded micro-ring resonators is designed based on SOI optical waveguide with the thickness of 220nm. The results of the target response demonstrate that the adjustable delay time can achieve 67ps and the tuning accuracy is less than 0.1ps.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129200442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
SAR real-time imaging pipeline technology based on multi-core DSP 基于多核DSP的SAR实时成像流水线技术
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971202
Ruimin Fang, Guangcai Sun, Yanbin Liu, M. Xing, Zi-jing Zhang
{"title":"SAR real-time imaging pipeline technology based on multi-core DSP","authors":"Ruimin Fang, Guangcai Sun, Yanbin Liu, M. Xing, Zi-jing Zhang","doi":"10.1109/CISS57580.2022.9971202","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971202","url":null,"abstract":"According to the characteristics of SAR imaging, a SAR real-time imaging pipeline technology based on multicore DSP is proposed. The algorithm uses sub-aperture complex image stitching technology for real-time data processing, uses ECS operation to process the range direction of each subaperture data, and uses the Dechirp operation to process the azimuth direction. This technology is based on TI’s multi-core DSP C6678 chip to achieve a pipeline design, and coherently splices the processed sub-aperture image data in the complex image domain to obtain a full-resolution image of the recorded data. The algorithm is optimized for the KeystoneII hardware architecture of the chip to meet the performance requirements of real-time processing of SAR imaging. In this paper, the banding mode of SAR is verified, and the imaging results of the measured data test the effectiveness and real-time performance of the technology.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124478293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Wideband Multi-wavelength True Time Delay Component with High integration 高集成度的宽带多波长真时延元件
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971206
Guodong Song, Junwei Shi, Hang Lan, Cichen Duan, Xiang Gao, Lizheng Zhang
{"title":"Wideband Multi-wavelength True Time Delay Component with High integration","authors":"Guodong Song, Junwei Shi, Hang Lan, Cichen Duan, Xiang Gao, Lizheng Zhang","doi":"10.1109/CISS57580.2022.9971206","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971206","url":null,"abstract":"A 11-bit wideband digital true time delay (TDD) component integrated with amplifier module is proposed in this paper. The true time delay units, bi-directional amplifiers, serial-to-parallel converter and power pulse modulated circuits are integrated in a multi-chip module (MCM) with monolithic microwave integrated circuit (MMIC) and surface mount technology (SMT). Multi-layer Rogers 4350B microwave board is used to implement the routing of DC, control and RF signals, while large bit TDD is achieved through winding upon the striplines. Better flatness of time delay and high isolation can be realized by introducing cavity structures. For verification, a multi-channel wideband TDD module has been designed, fabricated and measured. According to the measured results, the TDD module achieves the receive gain within 6.5 dB ± 2 dB, transmit power within 34dBm ± 1.0 dB, and high time-delay accuracy within ± 0.5 ps for 10 ps and ± 30 ps for 3200 ps, simultaneously.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123130938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A low altitude small target detection method based on Feature Clutter Map 基于特征杂波图的低空小目标检测方法
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971279
K. Guo, Tingyao Xie, Kaili Qin, Xi Ye, Feng Feng
{"title":"A low altitude small target detection method based on Feature Clutter Map","authors":"K. Guo, Tingyao Xie, Kaili Qin, Xi Ye, Feng Feng","doi":"10.1109/CISS57580.2022.9971279","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971279","url":null,"abstract":"Sea clutter changes dynamically with the external environment, and the detection of small low-altitude targets is seriously affected by sea clutter. The existing sea clutter and target feature classification methods based on machine learning have the problems of limited feature dimensions and the training model is seriously affected by uneven samples. This paper proposed a method for detecting low altitude small targets on the sea surface based on the feature clutter map. By extracting the multi-dimensional features of the target and sea clutter, this method establishes the feature clutter map under the pure sea clutter background, and determines whether there is a target by comparing with the feature clutter map during target detection. Compared with the target decision method based on three-dimensional convex hull, the feature dimension of this method can be extended to avoid missing detection and false alarm caused by different sensitivity of data to different features. Moreover, the pure sea clutter samples are easy to obtain, and there is no problem of inaccurate judgment caused by the imbalance between the target and the sea clutter training samples, so as to improve the detection probability of low altitude small targets under the sea clutter background. The method is verified by the measured data of a ku-band radar, and can effectively detect a low altitude small target in the background of sea clutter.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117151569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Attitude Control Method for Flexible Spacecraft Based on Disturbance Observer 基于扰动观测器的柔性航天器姿态控制方法
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971200
Chao Zhang, Yanghao Lin, Jiarui Pei, Zhiying Yang, Jinfeng Zhong, Siyan Guo
{"title":"Attitude Control Method for Flexible Spacecraft Based on Disturbance Observer","authors":"Chao Zhang, Yanghao Lin, Jiarui Pei, Zhiying Yang, Jinfeng Zhong, Siyan Guo","doi":"10.1109/CISS57580.2022.9971200","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971200","url":null,"abstract":"Considering the influence of disturbance and flexible solar panel vibration, the attitude stability control of spacecraft is studied. Based on traditional PD controller, a nonlinear disturbance observer based on sliding mode control is designed to estimate the sum of environmental disturbance, flexible vibration and model uncertainty. The Lyapunov method is used to prove that estimation errors are uniformly bounded and the closed-loop system is globally asymptotically stable. Simulation results show that the proposed method can effectively estimate and compensate the total disturbance, and then achieve high precision and high stability attitude control performance.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117296072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design of Dual-Polarized Shared-Aperture Waveguide Slot Antenna Array 双极化共孔径波导缝隙天线阵列设计
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971170
Yi Huang, Heng Zhang, L. Xue, Tianle Zhang, Yaodan Zhang
{"title":"Design of Dual-Polarized Shared-Aperture Waveguide Slot Antenna Array","authors":"Yi Huang, Heng Zhang, L. Xue, Tianle Zhang, Yaodan Zhang","doi":"10.1109/CISS57580.2022.9971170","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971170","url":null,"abstract":"As one of the key subsystems of the synthesis aperture radar (SAR) system, the antenna needs to have characteristics such as broadband, multi-polarization, and active phase control. Waveguide slot array antennas are widely used in radar and electronic communication fields for their low cross-polarization, compact structure, easy processing and installation. In this paper, a dual-polarized shared-aperture waveguide slot antenna operating in X-band has been designed as subsystem of SAR. An effective design method to realize the shared aperture of two polarized waveguide slot antenna arrays is proposed. The structure layout of the antenna array is optimized by this method, which ensures that the sub-arrays of both polarizations have excellent performance. The narrow beam antenna array operating in X-band has vertical and horizontal polarization half power beamwidths of $6 ^{circ} times 6.64 ^{circ}$ and $5.85 ^{circ} times 7.11 ^{circ}$, respectively, and the measured gains of the two polarization modes are both higher than 28dB. This kind of array arrangement makes full use of the space and improves the performance of the entire array. Because the beam width and gain of the antenna array meet the requirements, it has achieved good performance in the actual test.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132334300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design of a K-Band Integrated Tile-Type T/R Module k波段集成瓦式收发模块的设计
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971363
Junwei Shi, Guodong Song, Zhongyu Hu, Xiang Gao, Jing Tan, Lizheng Zhang
{"title":"Design of a K-Band Integrated Tile-Type T/R Module","authors":"Junwei Shi, Guodong Song, Zhongyu Hu, Xiang Gao, Jing Tan, Lizheng Zhang","doi":"10.1109/CISS57580.2022.9971363","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971363","url":null,"abstract":"This paper proposed a three-dimensional K-band transmit/receive (T/R) module. The proposed module works in T/R time-sharing mode and each channel has the capability of independent amplitude and phase modulation. Due to the multi-functional chip technique the module is highly integrated and minified with 32 channels. The passive circuit and microwave monolithic integrated circuit chips are placed on middle and top layers of the multi-layer Rogers 6002 board respectively. The entire radio frequency circuit can be constructed by vertical interconnection structure. To obtain high transmission performance and low insertion loss the key passive components such as power divider are modeled and optimized using full-wave electromagnetic simulation software. Compared with traditional brick-type module the tile-type module has more prospects in active phased array radars due to its small size and light weight.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130615418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A method for improving near-field BP imaging that Uses radiation pattern compensation 利用辐射方向图补偿改进近场BP成像的方法
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971293
M. Yang, T. Liu, B. Zhao
{"title":"A method for improving near-field BP imaging that Uses radiation pattern compensation","authors":"M. Yang, T. Liu, B. Zhao","doi":"10.1109/CISS57580.2022.9971293","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971293","url":null,"abstract":"This paper presents a method for acquiring the spatial structure of a target using millimeter-wave radar under near-field conditions and imaging a 3D target using 2D and 3D BP imaging methods. The situation that bright spots appear in the BP imaging algorithm to affect the imaging effect is analyzed. A compensation method using the radiation pattern is proposed to achieve the suppression of bright spots caused by strong scattering points. The 2D and 3D BP imaging effects are improved. The correctness of the method is verified by comparing the measured data.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127233132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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