发布求助
文献互助 智能选刊 最新文献

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

筛选
英文 中文
Dynamic Analysis and Optimization of Deployment Mechanism of Long-baseline Millimeter-wave Antenna 长基线毫米波天线展开机理的动态分析与优化
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971435
Li Ji, Yingnan Yuan, Zhongyu Wang, Dong Yang, Zhihang Chen, Hui Wang
{"title":"Dynamic Analysis and Optimization of Deployment Mechanism of Long-baseline Millimeter-wave Antenna","authors":"Li Ji, Yingnan Yuan, Zhongyu Wang, Dong Yang, Zhihang Chen, Hui Wang","doi":"10.1109/CISS57580.2022.9971435","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971435","url":null,"abstract":"The spaceborne millimeter wave SAR system has a high frequency band, which requires a high beam pointing stability when operating in orbit. The effect of space micro vibration on its beam direction is obvious. Therefore, in order to ensure the normal operation of the system in orbit, a higher support stiffness is required for the antenna deployment mechanism. In this paper, the spaceborne millimeter wave orbit crossing interference antenna was taken as the research object. According to the index requirements, the configuration design and on orbit dynamics analysis of the antenna in the folded and deployed state were carried out, and the weak components were identified. The first order natural frequency of the SAR antenna deployment configuration was taken as the target to optimize the design of each weak component, and the optimized antenna fundamental frequency reached 8.03Hz, meeting the requirements that the index was greater than 7Hz. The mass and retraction envelope of the optimized antenna mechanism were within the constraints of the satellite and the carrier. In addition, the dynamic simulation analysis of the optimized antenna structure was carried out. With the three-axis attitude angle of the satellite as the input condition, the mechanical center relative to the three-axis angle deviation of the orbital intersection interference antenna on both sides was analyzed. The results show that the error and beam stability meet the index requirements and do not affect the imaging quality of SAR antenna.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"44 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":"133917582","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
FDDphase: A Package For Statistical Analysis of the Phase from Polarimetric Data FDDphase:一个从偏振数据中统计分析相位的软件包
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971358
Joselito E. Araujo, A. Borba, A. Frery
{"title":"FDDphase: A Package For Statistical Analysis of the Phase from Polarimetric Data","authors":"Joselito E. Araujo, A. Borba, A. Frery","doi":"10.1109/CISS57580.2022.9971358","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971358","url":null,"abstract":"Polarimetric Synthetic Aperture Radar data provide a wealth of information. A complete single-frequency observation of this kind is a complex matrix with nine degrees of freedom: three intensities and three complex covariances. There are several ways of extracting valuable information from these observations, among them the use of statistical models. In particular, the difference between the phases of the complex covariances is important in interferometric applications. In this article we survey statistical models for this kind of circular data. We present both physically-derived and empirical distributions, we highlight their relationships and present estimators for their parameters in an unified manner. We present a package for the R platform for statistical analysis of phase data under univariate physical and empirical models, their estimators, and their relationships.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"57 6 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":"133120071","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 C-band Pulse Power Amplifier for Radar Transmitter 用于雷达发射机的c波段脉冲功率放大器
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971268
Zhongyu Hu, Qi Qiao, Junwei Shi, Ziqi Shao, Xiaokun Bai, Yafei Shen
{"title":"A C-band Pulse Power Amplifier for Radar Transmitter","authors":"Zhongyu Hu, Qi Qiao, Junwei Shi, Ziqi Shao, Xiaokun Bai, Yafei Shen","doi":"10.1109/CISS57580.2022.9971268","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971268","url":null,"abstract":"As an important part of transmitter in radar system, the power amplifier is used to amplify the low power input RF signals. In this paper, a C-band power amplifier with an output power of 40dBm and a bandwidth of 640MHz is presented. The power amplifier is mainly composed of RF part and power-supply module. In order to meet the output power requirements, a two-stage cascaded structure by GaAs transistors is adopted. The overall size of the designed power amplifier is about 175mm$times120mmtimes$24mm and the power consumption is less than 17W (20% duty cycle). Measurement results show that the product possesses good performance which can meet the technical requirements well.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"42 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":"124459703","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
An Improved YOLO-v3Algorithm for Ship Detection in SAR Image Based on K-means++ with Focal Loss 基于k -means++的SAR图像船舶检测改进yolo -v3算法
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971239
Haonan Wang, Baolong Wu, Yanni Wu, Shuang-xi Zhang, Shaohui Mei, Yanyang Liu
{"title":"An Improved YOLO-v3Algorithm for Ship Detection in SAR Image Based on K-means++ with Focal Loss","authors":"Haonan Wang, Baolong Wu, Yanni Wu, Shuang-xi Zhang, Shaohui Mei, Yanyang Liu","doi":"10.1109/CISS57580.2022.9971239","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971239","url":null,"abstract":"In recent years, practical industrial production application have put forward extremely high requirements for its detection accuracy and detection efficiency in the aspect of synthetic aperture radar (SAR) image ship detection. Among the solutions to this problem, the YOLO has received more and more attention due to its advantages such as high speed. In this paper, the K-means++ is used to obtain the Anchor Box, the Focal loss is introduced to balance the proportion of positive and negative samples, and an improved image detection algorithm based on YOLO-v3 is proposed to solve the low detection efficiency and detection accuracy of ship images. The experimental results show that the improved algorithm in this paper can get rid of the local optimum well, shorten the convergence time, improve the training efficiency and the accuracy of ship image detection.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"6 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":"132091327","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
Radar Sea Clutter Feature Classification Based on Machine Learning 基于机器学习的雷达海杂波特征分类
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971328
Qihang Zhou, Hui Xu, Zhicheng Wang, Zhijun Zhang, Xian Zhang
{"title":"Radar Sea Clutter Feature Classification Based on Machine Learning","authors":"Qihang Zhou, Hui Xu, Zhicheng Wang, Zhijun Zhang, Xian Zhang","doi":"10.1109/CISS57580.2022.9971328","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971328","url":null,"abstract":"The Marine environment is complex and changeable. The classification of sea clutter and target detection are the most important parts in the signal processing of sea detection radar. A large number of researches have been carried out at home and abroad to identify radar clutter by extracting different features. Machine learning is a common method. In this paper, SVM algorithm and DNN algorithm were respectively used to classify the short-range and medium-range clutter. By taking the measured sea clutter data as the training input, three power spectral features were extracted, which achieved high detection accuracy. Considering the training sample number, operation efficiency and detection accuracy, the application scope of the two machine learning methods is compared, and it is pointed out that the machine learning is of great significance for advancing the intelligent classification and identification of sea clutter.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"6 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":"131544928","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 Inter-satellite Measurement System for Distributed SAR Application 分布式SAR卫星间测量系统设计
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971337
Jiongyuan Zhou, Yu Tian, Yunchi Shi, C. Li, Yanpeng Wang
{"title":"Design of Inter-satellite Measurement System for Distributed SAR Application","authors":"Jiongyuan Zhou, Yu Tian, Yunchi Shi, C. Li, Yanpeng Wang","doi":"10.1109/CISS57580.2022.9971337","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971337","url":null,"abstract":"Compared with the traditional single-star SAR(synthetic aperture radar) system, the dual-star SAR system has unique advantages in terms of interferometry, tomography, and high-resolution wide-format imaging due to its flexible configuration. When imaging using a dual-star SAR system, it is necessary to accurately obtain the relative position and time information of the two stars. Aiming at the problems of inter-satellite two-way ranging and time synchronization, the method of two-way time comparison is carried out by using the forwarding time of the satellite. Through the extraction of the baseband information, the analysis, calculation and framing of the test frame, the reception of ranging frame and the management of transmission, the proposed system can finish bidirectional ranging. Through innovative framing trigger design and pseudo-range selection design algorithm, the intersatellite measurement system is more suitable for the measurement environment of dual-satellite SAR. Corresponding testing and simulation results show that the proposed technique can substantially improve the accuracy of distributed SAR observation, which is more suitable for the inter-satellite measurement compared to the traditional satellite-to-ground measurement.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"50 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":"133625270","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 compression method of yolov5 model based on channel pruning 基于信道剪枝的yolov5模型压缩方法研究
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971442
Bi Yuxuan, Yang Rui, Xiaoman Zhang, Li Yujia, Gu Yuehan
{"title":"Research on compression method of yolov5 model based on channel pruning","authors":"Bi Yuxuan, Yang Rui, Xiaoman Zhang, Li Yujia, Gu Yuehan","doi":"10.1109/CISS57580.2022.9971442","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971442","url":null,"abstract":"With the development of high-resolution and wide -format SAR satellites, on-board real-time processing of massive data has become a major development trend. However, due to the limitation of on-board resources, on-board real-time processing is faced with insufficient storage space, insufficient operating memory, and a large amount of computation. In order to solve this problem, this paper conducts channel pruning for the large target detection model yolov5 to achieve model compression, uses the bn layer as the basis for pruning, and adaptively determines the pruning ratio of each layer on the basis of analyzing the pruning sensitivity. We experimentally determine the best retraining strategy. In the end, this paper obtained the yolov5 lightweight network model with 5 configurations, the parameter reduction range is 74%-93%, the computation volume reduction range is 49.4%-89.6%, and the Map floats -3.6%-0.6% compared with before pruning. It is proved that the pruning scheme proposed in this paper has both large compression ratio, high precision and flexibility, and has important reference significance for the real-time target detection task on board.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"40 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":"117165939","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
Analysis for the effect of wavefront aberrations on the performance of distributed SAR microwave photonic link 波前像差对分布式SAR微波光子链路性能的影响分析
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971359
Yulong Fu, Hui Wang, Zhiqiang Sun, Sili Wu, Zhongyu Wang, Shichao Zheng
{"title":"Analysis for the effect of wavefront aberrations on the performance of distributed SAR microwave photonic link","authors":"Yulong Fu, Hui Wang, Zhiqiang Sun, Sili Wu, Zhongyu Wang, Shichao Zheng","doi":"10.1109/CISS57580.2022.9971359","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971359","url":null,"abstract":"Microwave photonic relay technology is one of the effective methods to solve the phase synchronization problem of distributed synthetic aperture radar (SAR) system, and has received extensive attention. In this paper, the influence of wavefront aberrations on the performance of the microwave photonic link is investigated. It is shown that the spurious-free dynamic range performance depends on the normalized radius and the normalized center distance. This work will contribute to the design of distributed SAR microwave photonic system.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"52 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":"115706489","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
In-Orbit Calibration Method of Beam Pointing Consistency for Distributed InSAR Satellites 分布式InSAR卫星波束指向一致性在轨标定方法
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971195
Di Zhao, Yuchuan Xu, Xuezhen Wang, Yusheng Hou, Nan Li, Junli Chen
{"title":"In-Orbit Calibration Method of Beam Pointing Consistency for Distributed InSAR Satellites","authors":"Di Zhao, Yuchuan Xu, Xuezhen Wang, Yusheng Hou, Nan Li, Junli Chen","doi":"10.1109/CISS57580.2022.9971195","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971195","url":null,"abstract":"In this paper, an in-Orbit calibration method of satellite beam pointing consistency of distributed interferometric synthetic aperture radar (InSAR) is proposed, which can be used in the design of distributed InSAR binary SAR system. During the in-orbit operation of distributed InSAR satellites, due to the inconsistency of dual satellite SAR beam direction and transceiver status, the working temperature environment of dual satellite SAR is inconsistent, resulting in the deviation of dual satellite SAR beam direction and the decrease of slave satellite receiving power, which leads to the problem of poor coherence of dual spaceborne SAR echo data. The implementation of this method is divided into two parts: \"rough adjustment\" and \"fine adjustment\". It can calibrate the beam pointing consistency of distributed InSAR satellites in orbit, effectively improve the coherence of dual images, and thus improve the mapping quality/accuracy of satellite system.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"191 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":"115622055","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
CISS 2022 IEEE Copyright Page CISS 2022 IEEE版权页面
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/ciss57580.2022.9971346
{"title":"CISS 2022 IEEE Copyright Page","authors":"","doi":"10.1109/ciss57580.2022.9971346","DOIUrl":"https://doi.org/10.1109/ciss57580.2022.9971346","url":null,"abstract":"","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"51 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":"121585011","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信