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2021 2nd China International SAR Symposium (CISS)最新文献

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A DBR Microstrip Duplexer Based on Improved Microstrip Cross-Shaped Resonators 基于改进型微带交叉谐振器的DBR微带双工器
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652311
Zhen Yang, Junjun Cheng, Jiaying Wang, Huifeng Shang, Qiu Gao
{"title":"A DBR Microstrip Duplexer Based on Improved Microstrip Cross-Shaped Resonators","authors":"Zhen Yang, Junjun Cheng, Jiaying Wang, Huifeng Shang, Qiu Gao","doi":"10.23919/CISS51089.2021.9652311","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652311","url":null,"abstract":"A DBR microstrip duplexer based on improved microstrip cross-shaped resonators is proposed in this paper. Firstly, a high-precision UWB equivalent circuit parameter extraction method based on admittance matrix is proposed by modeling and researching the microstrip cross-shaped resonator. Then, the conventional microstrip cross-shaped resonator is improved to a concave-microstrip cross-shaped resonator and a convex-microstrip cross-shaped resonator to eliminate the parasitic capacitance produced by the center junction structure, and the DBR filter based on the improved microstrip cross-shaped resonator was developed. Finally, based on this, a high-performance DBR microstrip duplexer operating in the Ku-band is designed. The 3 dB relative bandwidth of the lower channel (at 14 GHz) and the upper channel (at 16.5 GHz) is 7.3% and 6.4%, respectively. The insertion loss in the passband is less than 2.2 dB and 2 dB, respectively, and the return loss is better than 14 dB and 12 dB;Stop-band suppression is higher than 50dB; the isolation is up to 60dB.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116445887","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: 2
Design and Analysis of LFMCW Radar with the Signal based on Microwave Photonic Generation 基于微波光子产生信号的LFMCW雷达设计与分析
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652226
Shuguang Li, Shangrong Ouyang, Zhenhua Kuai, Shuhai Shi, Lele Zhu
{"title":"Design and Analysis of LFMCW Radar with the Signal based on Microwave Photonic Generation","authors":"Shuguang Li, Shangrong Ouyang, Zhenhua Kuai, Shuhai Shi, Lele Zhu","doi":"10.23919/CISS51089.2021.9652226","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652226","url":null,"abstract":"This paper presents the design of LFMCW radar system based on the signal generation of microwave photonics technology. It introduces the system design method, demonstrates the technical parameters of each component, and analyzes the performance of the radar system. The system uses the external signal with low-frequency and narrow bandwidth to obtain the 6 times frequency signal carried on the laser through the dual-parallel electro-optic modulator, and then realizes the high-frequency and broadband radar signal through the photoelectric detector, and then transmit via the antenna. At the receiving end, the method of electric de-chirping is used to down convert the radar echo signal. After analog to digital conversion, ranging and imaging are processed. Theoretical analysis and simulation results show that under the condition of average transmitting power of 10W, the range of continuous frequency modulated continuous wave radar based on this system can reach 5km.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115053818","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: 2
Error Extraction and Compensation Method of Calibration Signal 标定信号误差提取与补偿方法
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652230
Zhaoyang Zeng, Hui Wang, Yuxuan Bie, Lipeng Feng, Shichao Zheng, Ying Sun
{"title":"Error Extraction and Compensation Method of Calibration Signal","authors":"Zhaoyang Zeng, Hui Wang, Yuxuan Bie, Lipeng Feng, Shichao Zheng, Ying Sun","doi":"10.23919/CISS51089.2021.9652230","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652230","url":null,"abstract":"By broadcasting a linear frequency modulation signal (LFM) with a large temporal width and bandwidth, the airborne spaceborne synthetic aperture radar (SAR) achieves high resolution in the range. The chirp signal flowing across the transmitting and receiving links has certain amplitude and phase defects since the actual system is not a perfect system. The effect of pulse compression will be substantially influenced by non-linear phase inaccuracy. System calibration can extract nonlinear errors, perform polynomial fitting on the retrieved errors, and apply amplitude and phase correction to the broadcast signal, thereby improving the chirp signal's pulse compression impact.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134549377","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
Improved RD imaging method based on the principle of step-by-step calculation 改进了基于分步计算原理的RD成像方法
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652338
Zhicheng Wang, Feiming Wei, Yong Huang, Xian Zhang, Zhijun Zhang
{"title":"Improved RD imaging method based on the principle of step-by-step calculation","authors":"Zhicheng Wang, Feiming Wei, Yong Huang, Xian Zhang, Zhijun Zhang","doi":"10.23919/CISS51089.2021.9652338","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652338","url":null,"abstract":"RD (Range Doppler) imaging algorithm is a classical SAR imaging algorithm. The algorithm has simple principle and strong universality. It is widely used in multiple flight platforms or multi-mode SAR imaging. The basic idea of the classical RD algorithm is to realize the two-dimensional imaging of SAR through two matched filters: range compression and azimuth compression, combined with range migration correction. In the process of quadratic matched filtering,. there are a lot of basic FFT operations. Especially in the process of azimuth compression,. it is necessary to carry out FFT calculation along the \"slow time\" axis of the range to multiple resolution units. The processing time of this step is related to the observation range,. range resolution and FFT transform points. In the application of high resolution imaging,. the higher the azimuthal resolution is within the same observation range,. the more times of azimuthal FFT transformation is needed,. and the longer the operation time of the imaging processing system is. Using the principle of step-by-step calculation,. the FFT operation of a complete sequence is divided into multiplication and addition operations of multiple sequences which can be calculated step by step. In order to save the whole operation time of the imaging processing system and improve the efficiency of RD imaging operation,. the simple sequence multiplication and addition operation process is evenly distributed to the imaging data preparation process,. and the preprocessing function of azimuth FFT operation is realized by using the data preparation time.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116080809","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
The In-orbit Test Method for Distributed InSAR Satellite Azimuth Space Synchronization 分布式InSAR卫星方位空间同步在轨测试方法
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652341
Xizhi Chen, Yusheng Hou, Yi Li, Di Zhao, Junli Chen
{"title":"The In-orbit Test Method for Distributed InSAR Satellite Azimuth Space Synchronization","authors":"Xizhi Chen, Yusheng Hou, Yi Li, Di Zhao, Junli Chen","doi":"10.23919/CISS51089.2021.9652341","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652341","url":null,"abstract":"The distributed satellite InSAR (interferometric synthetic aperture radar) system is currently an important and excellent remote sensing method for obtaining high-precision Digital Surface Model (DSM). In order to achieve InSAR interferometry, it is necessary to ensure the space synchronization of the binary satellite SAR beams, so as to provide the auxiliary satellite to receive enough echo energy and maintain good coherence with the Master satellite. This paper proposes an In-orbit test method for the azimuth space synchronization index of the maximum coherence method, which can effectively obtain the azimuth space synchronization test results, improve the validity and reliability of the test, and provide strong support for the InSAR system to obtain high-precision DSM products.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116402811","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 miniaturized Ku-band rectangular waveguide-coaxial-microstrip transition structure 小型化ku波段矩形波导-同轴-微带过渡结构的设计
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652302
Hongying Zhang, Hanbing Luo, Guilian Chen, Fan Yang, Na Wang, W. Shen
{"title":"Design of a miniaturized Ku-band rectangular waveguide-coaxial-microstrip transition structure","authors":"Hongying Zhang, Hanbing Luo, Guilian Chen, Fan Yang, Na Wang, W. Shen","doi":"10.23919/CISS51089.2021.9652302","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652302","url":null,"abstract":"A transition structure of rectangular waveguide-coaxial line-microstrip-gold wire-chip pad is proposed in this paper. In the design, three-step rectangular waveguide is adopted, which is fed from the bottom of the microstrip through the coaxial structure (glass insulator). The microstrip and the chip pad are interconnected with gold wire. According to the classical microwave theory, HFSS software is used to model, simulate and optimize. By adjusting the height and width of rectangular steps, as well as the key parameters of coaxial and microstrip, it is achieved that the return loss is less than -20.7dB and the insertion loss is less than 0.06dB in the range of 14.5-18GHz band. This transition structure has a broad application prospect and can be used in TR modules and can be connected with waveguide antennas in SAR system.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123426001","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: 1
A method of clutter-eliminating based on In-SAR imaging measurement 基于In-SAR成像测量的杂波消除方法
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652383
Xiuli Xu, Mianzhi Cheng, Guang-de Tong, Yajun Wu, Qiping Chen, D. Gu
{"title":"A method of clutter-eliminating based on In-SAR imaging measurement","authors":"Xiuli Xu, Mianzhi Cheng, Guang-de Tong, Yajun Wu, Qiping Chen, D. Gu","doi":"10.23919/CISS51089.2021.9652383","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652383","url":null,"abstract":"A method is presented for eliminating the clutter such as background, multipath clutter and so on. As we know, target’s altitude can be obtained based on In-SAR imaging theory with two receiving-antennas at different height. According to the altitudes difference between the target and the background, the echo signal can be decomposed into two parts, one is from the measured target area, and the other one is from the background area. Therefore, a system of linear equation in two unknowns comes into being based on the two receiving-antennas’ echo signals, and the clutter from the background can be eliminated by solving the equation efficiently. Both theoretical simulation and experimental results validate the correctness and feasibility of the technology.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"606 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121980248","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 Real-time Ship Detection Algorithm for High Resolution SAR Image 一种高分辨率SAR图像实时船舶检测算法
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652378
Yuxuan Bie, Rui Yang, Hui Wang
{"title":"A Real-time Ship Detection Algorithm for High Resolution SAR Image","authors":"Yuxuan Bie, Rui Yang, Hui Wang","doi":"10.23919/CISS51089.2021.9652378","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652378","url":null,"abstract":"SyntheticApertureRadar (SAR) image ship target surveillance is an important aspect of the application of SAR in Marine remote sensing. It has great significance in fishery control, maritime traffic management, combating piracy, protecting the seas and protecting rights and interests. Spaceborne real-time processing technology is one of the important development directions of high-resolution spaceborne SAR in the future. Currently, ship detection of SAR images generally has many problems, such as large computation, inaccurate feature extraction and high false alarm rate, which make it difficult to realize efficient and accurate real-time detection.In this paper, a CFAR (Global Constant False-Alarm Rate) SAR image ship target detection algorithm is proposed to solve the problem of inaccurate feature extraction caused by large computation amount of ship detection and serious sidelobe in high resolution SAR image. Firstly, based on the Gaofen-3 image, the global CFAR algorithm is used for preliminary detection. Then, the connected region is extracted, and ROI is selected by the number of pixels in the connected region. Then, the influence of ROI sidelobe was removed by an iterative rotation sidelobe removal method, and its geometric features were extracted. Finally, the geometric features are used to screen out the final detection results. The simulation results show that the proposed algorithm has better efficiency and detection performance than the traditional CFAR method.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124733469","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 Radar Imaging Processing Platform Based on the Architecture with Digital Signal Acquisition Board and GPU 基于数字信号采集板和GPU架构的雷达成像处理平台设计
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652235
F. Feng, Yatao Li, Xi Ye, Shuhai Shi, Shuguang Li
{"title":"Design of Radar Imaging Processing Platform Based on the Architecture with Digital Signal Acquisition Board and GPU","authors":"F. Feng, Yatao Li, Xi Ye, Shuhai Shi, Shuguang Li","doi":"10.23919/CISS51089.2021.9652235","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652235","url":null,"abstract":"In response to the need for larger calculations and higher real-time performance in the radar imaging processing process, it is proposed a radar imaging processing platform architecture, which is consisted of a high-speed digital signal acquisition board, a fiber-PCIE board, and a GPU server structure. The radar signal after A/D is sent from the high-speed digital signal acquisition board to the fiber-PCIE board through the optical fiber, which uses the aurora 64b/66b optical communication protocol to achieve a 10Gbps transmission rate. Then the digital signal is transmitted to the CPU through the PCIE port. After that, it is transported to the GPU memory for subsequent imaging processing. The design is simulated and verified, the test results of the acquisition board are given, and The Omega-K Algorithm (ωKA) is taken as an example to give the GPU processing results.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124882087","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 pointing error on the performance of dual-satellite SAR fiber coupled microwave photonic link 指向误差对双星SAR光纤耦合微波光子链路性能的影响分析
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652241
Yulong Fu, Hui Wang, Zhiqiang Sun, Shichao Zheng, Sili Wu, Jiahe Mei
{"title":"Analysis for the effect of pointing error on the performance of dual-satellite SAR fiber coupled microwave photonic link","authors":"Yulong Fu, Hui Wang, Zhiqiang Sun, Shichao Zheng, Sili Wu, Jiahe Mei","doi":"10.23919/CISS51089.2021.9652241","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652241","url":null,"abstract":"With the development of Synthetic Aperture Radar (SAR) towards distributed, some new challenges need to be overcome, such as phase synchronization. Microwave photon relay technology is one of the advantageous methods to solve the phase synchronization problem. In this paper, a dual-satellite SAR system using microwave photonic technology to achieve echo analog signal relay is introduced. The influence of pointing error on the third-order spurious-free dynamic range performance of the microwave photonic link is investigated by taking into account the pointing error in the fiber coupling efficiency.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128785027","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: 1
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