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IEEE 2007 Radar Conference

作者： Dan, Lu Renbiao, Wu Zhigang, Su Wei, Huang Tianjin Key Lab. for Advanced Signal Processing Civil Aviation University of China Tianjin 300300 China National Key Lab. for Radar Signal Processing Xidian University Xi'an 710071 China

ISBN: (纸本)1424402840

Global Positioning System (GPS) has found wide application in many areas. However, due to the low power of the received signal, GPS is susceptible to a variety of interferences and multipath. In this paper, a two stage GPS anti-jamming processor based on adaptive arrays is proposed. Firstly, the array received signals are projected onto the orthogonal subspace corresponding to interference to suppress interferences. Then the interference free signals are further processed by a conventional data-independent beamforming to enhance the GPS direct-path signal and mitigate GPS multipath signals. Simulation results are provided to demonstrate the performance of the proposed algorithm. © 2007 IEEE.

关键词： Global positioning system

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Design and Implementation of Flight Data processing Software for Global Flight Tracking System Based on Stored Procedure 8th

Design and Implementation of Flight Data Processing Software...

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8th International Conference on Communications, signal processing, and Systems, CSPS 2019

作者： Wang, Peng Wang, Wanwei Zhang, Zhe Chen, Min Yang, Jun Tianjin Key Lab for Advanced Signal Processing Civil Aviation University of China Tian Jin China

ISBN: (纸本)9789811394089

Civil Aviation Administration of China (CAAC) proposed to enhance the global tracking and monitoring capability of China civil aircraft after the MH370 incident. In order to meet the urgent needs of global tracking for civil aircraft in China, the design scheme of flight data processing software for global flight tracking system was presented in this paper. Based on the features and operational process of global flight tracking, the overall framework and interface design of the software were given in detail. In order to meet the performance needs of the real-time processing of emergency mass data, the database access technology based on stored procedure was adopted and the realization method of flight data processing software was given. The engineering application and the test results shows that the software can well meet the functionality and performance requirements for the flight data processing of global flight tracking system, which provides technical reference for improving the global tracking and monitoring capability of China civil aircraft. © 2020, Springer Nature Singapore Pte Ltd.

关键词： Software testing

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Weighted Graph Based Description for Finger-Vein Recognition 12th

Weighted Graph Based Description for Finger-Vein Recognition

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12th Chinese Conference on Biometric Recognition, CCBR 2017

作者： Ye, Ziyun Yang, Jinfeng Palancar, Jose Hernandez Tianjin Key Lab for Advanced Signal Processing Civil Aviation University of China Tianjin China Advanced Technologies Applications Center Havana Cuba

ISBN: (纸本)9783319699226

The randomness of vein networks determines the discrimination of finger veins patterns in recognition. Effectively describing the random patterns is therefore very important for finger-vein based biometrics. In this paper, a new graph-based method is proposed for finger-vein network feature representation. A block-wise action is first done for graph node generation from a finger-vein image. By applying Delaunay triangulation to these obtained nodes, the graph edges are then built for featuring the spatial relations between images blocks. For a given feature space, each of these edges can locally represent a relationship between two adjacent nodes. Considering local variations in image contents, the graph edges are further weighted node-wisely using the statistics of image blocks. Thus, a graph can globally represent a finger-vein network, and its weighted edges can locally describe the relations of image blocks. Experimental results on two image databases totally 1,200 image samples show that the proposed method performs well in finger-vein recognition. © 2017, Springer International Publishing AG.

关键词： Graphic methods

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Optimal projection space method for SAR target recognition

Optimal projection space method for SAR target recognition

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2009 Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2009

作者： Chang, Ming Su, Zhi-Gang Wu, Ren-Biao Han, Ping National Key Lab. for Radar Signal Processing Xidian Univ. Xi'an 710071 China Tianjin Key Lab. for Advanced Signal Processing Civil Aviation Univ. of China Tianjin 300300 China

ISBN: (纸本)9781424427314

Automatic target recognition technique, based on the projections in the samples range space, can be availably used in SAR target recognition. It requires that the relativity between the range spaces of different targets should be minimal. However, the relativity between the corresponding range spaces is very big if the different targets have similar appearance and structure, which will considerably reduce the recognition performance. So, it is essential to construct new projection spaces from the range spaces of similar targets, so as to enlarge projection difference. In this paper, an efficient method for constructing the optimal projection space is proposed. The proposed method can effectively enlarge the difference between similar targets by the projections in the optimal projection space. Experimental results show that the optimal projection space can greatly increase the separability between different similar targets, and is superior to other classical methods in both recognition performance and efficiency. ©2009 IEEE.

关键词： Synthetic aperture radar

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A robust estimation method for InSAR interferometric phase

A robust estimation method for InSAR interferometric phase

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2009 Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2009

作者： Li, Hai Liao, Guisheng Wu, Renbiao Tianjin Key Lab. for Advanced Signal Processing Civil Aviation University of China Tianjin 300300 China National Lab. of Radar Signal Processing Xidian Univ. Xi'an 710071 China

ISBN: (纸本)9781424427314

In this paper, a robust method for synthetic aperture radar interferometry (InSAR) interferometric phase estimation is introduced. In the method, the optimal joint data vector is determined, the generalized correlation steering vector is computed according to the data vector, and then the beamforming technique with the steering vector is used to estimate the InSAR interferometric phase. The method can carry out image coregistration and interferometric phase estimation simultaneously. ©2009 IEEE.

关键词： Beamforming

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Power minimization with derivative constraints for high dynamic GPS interference suppression

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Science China(Information Sciences) 2012年第4期55卷 857-866页

作者： WU RenBiao 1,2,LI Chan 1 & LU Dan 1 1 tianjin key laboratory for advanced signal processing,Civil Aviation University of China,tianjin 300300,China 2 Intelligent Information Institute of ATR lab,Shenzhen University,Shenzhen,518060,China 1. Tianjin Key Laboratory for Advanced Signal Processing Civil Aviation University of China Tianjin 300300 China2. Intelligent Information Institute of ATR Lab Shenzhen University Shenzhen 518060 China

In this paper,a novel adaptive interference suppression algorithm is proposed for high dynamic GPS (global positioning system) *** new method incorporates derivative constraints on the inter-ference DOA (direction of arrival) into power minimization approach,which could broaden the width of nulls in the interferences directions and adapt to the rapid change of the interference *** with the traditional wide nulling algorithm based on the derivative constraints,the new method does not have to know or estimate the DOAs of the desired signal and the *** new method is firstly discussed in the context of spatial processing,and then extended to space-time adaptive processing to mitigate wideband diffusive multipath *** of the new method is verified via simulation examples.

关键词： GPS interference cancellation adaptive arrays space-time adaptive processing high dynamic GPS receiver

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A novel STAP method for the detection of fast air moving targets from high speed platform

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Science China(Information Sciences) 2012年第6期55卷 1259-1269页

作者： WU RenBiao 1,2,JIA QiongQiong 1 & LI Hai 1 1 tianjin key laboratory for advanced signal processing,Civil Aviation University of China,tianjin 300300,China 2 Intelligent Information Institute of ATR lab,Shenzhen University,Shenzhen 518060,China 1. Tianjin Key Laboratory for Advanced Signal Processing Civil Aviation University of China Tianjin 300300 China2. Intelligent Information Institute of ATR Lab Shenzhen University Shenzhen 518060 China

Space-time adaptive processing (STAP) is an effective method for detecting moving target in airborne/spaceborne ***,the detection of fast air moving targets from high speed platform is challenged by the range walk of both the clutter and moving *** is well known that keystone formatting can be used to compensate for the range walk of multiple moving targets simultaneously without using the knowledge of the motion ***,in the presence of serious Doppler ambiguity of fast air moving targets,distribution of the clutter will be affected by the keystone formatting matched to the ambiguity number of targets,and as a result the STAP performance will *** this paper,a novel STAP method is proposed for the detection of fast air moving targets from high speed platform,which can deal with the range walk of both clutter and *** of the new method is verified via simulation examples.

关键词： airborne/spaceborne radar keystone formatting space-time adaptive processing (STAP) moving target detection

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Contour construction based on adaptive grids

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2nd International Conference on Natural Computation, ICNC 2006

作者： Jinfeng, Yang Renbiao, Wu Ruihui, Zhu Yanjun, Li Tianjin Key Lab for Advanced Signal Processing Civil Aviation University of China P.O. Box 9 Tianjin China

ISBN: (纸本)3540459073

Contour information is always valuable for object analysis in image processing. In this paper, a new method of constructing contours of skin regions is proposed. To exploit skin formation in images, a nonlinear skin color classifier is first introduced. Then, a region splitting scheme is adopted to generate adaptive grids over skin regions. Based on the grids, initial contours are constructed. Finally, the contours are refined according to the minimum energy principle. Experimental results show that the proposed method has a good performance in contour construction of skin regions. © Springer-Verlag Berlin Heidelberg 2006.

关键词： Color image processing

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Finger-vein matching based on adaptive vector field estimation

Finger-vein matching based on adaptive vector field estimati...

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2012 19th IEEE International Conference on image processing, ICIP 2012

作者： Yang, Jinfeng Wu, Meijing Wang, Wanyin Shi, Yihua Tianjin Key Lab for Advanced Signal Processing Civil Aviation University of China P.O. Box 9 Tianjin China

ISBN: (纸本)9781467325332

In this paper, a new finger-vein vector field estimation method is proposed for the primitive finger-vein feature representation. First, a set of spatial curve filters (SCFs) is built based on a variable curve model in curvature and orientation. To make SCFs adaptive to vein-width variations, a curve length field (CLF) estimation method is then proposed. Next, with the CLF constrain, a vein vector field is established for finger-vein feature description. Finally, finger-vein matching performance is evaluated using Phase-Only-Correlation (POC) measure. Experimental results show that the proposed method is highly powerful in improving finger-vein matching accuracy. © 2012 IEEE.

关键词： Vectors

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Void-layer detection and depth determination in runways based on GPR

Void-layer detection and depth determination in runways base...

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6th International Conference on Radar, RADAR 2011

作者： He, Weikun Wu, Renbiao Liu, Jiaxue Electronic Information Engineering Institude Tianjin University China Tianjin Key Lab for Advanced Signal Processing Civil Aviation University of China China

ISBN: (纸本)9781424484416

Void-layer detection and thickness determination in runways are studied in this paper. Void-layer is thin layer whose thickness is very small (usually less than 1cm). Firstly, the void-layer can be detected based on its time-frequency distribution characteristic S transform. This is the first attempt of S transform to be used in the void-layer detection of runways. In the same time, the depth of void-layer can be evaluated based on spectrum optimisation inversion method, in which the impulse pair in the time domain corresponding to the upper and bottom interface of void-layer can be extracted based on the EM wave propagation model and improved system identification method we have proposed in other paper. The simulation results demonstrate the proposed method is valid and the estimation error of thickness is within 5%. © 2011 IEEE.

关键词： Ground penetrating radar systems

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