Entity

Time filter

Source Type

Beijing, China

Xu J.-J.,PLA Air Force Aviation University | Zhang R.,95961 Air Force Army | Bi D.-Y.,PLA Air Force Aviation University | Sun L.,Radar and EW Institute
Kongzhi yu Juece/Control and Decision | Year: 2012

To solve the problem of moving objects located difficultly under complex background, a tracking algorithm based on AdaBoost is proposed. Firstly, an ensemble of weak classifiers is trained online to distinguish between the object and the background. Then, the ensemble of weak classifiers is combined into a strong classifier by using AdaBoost, and strong classifier is used to label pixels in the next frame, and a confidence map is given. Finally, the new position of the object is found by using mean shift algorithm. Experimental results show that this algorithm is robust and can track the object accurately under the conditions of illumination variation, shape change of object and partial occlusion. Source


Wang S.-S.,Radar and EW Institute | Wang Y.-C.,Xian University of Technology
Nanjing Youdian Daxue Xuebao (Ziran Kexue Ban)/Journal of Nanjing University of Posts and Telecommunications (Natural Science) | Year: 2013

Based on the MMSE criterion, an iteration algorithm without division operation applied to one-order complex filter cell is derived in this paper. A novel high orders matrix filter consisting of this cell is proposed. Simulation results show that the matrix filter structure can adaptively track and eliminate multi-narrowband interferences with weight iteration convergence algorithm. The key work on FPGA design of the matrix adaptive filter is also specified is this thesis. Source


Liu Y.,Beijing University of Posts and Telecommunications | Li J.,Beijing University of Posts and Telecommunications | Zhang H.,Radar and EW Institute
Proceedings 2011 International Conference on Transportation, Mechanical, and Electrical Engineering, TMEE 2011 | Year: 2011

IETF has developed the NEtwork MObility Basic Support (NEMO BS) protocol to handle mobility of an entire mobile network. When used in Aeronautical Passenger Communications (APC), the NEMO BS and the existing route optimization (RO) schemes face some problems such as end-to-end delay, high signaling overhead or high load of the home agent. This paper presents a scheme named APCRO to optimize the route of NEMO especially for APC. The key points of our mechanism are to establish an Access Router (AR) to correspondent node (CN) RO scheme to optimize the path on the ground and to update the user's location by the home agent of the mobile router. The evaluation and the comparison with other mechanism illustrate the proposed scheme has the shortest end-to-end delay and smallest signaling overhead within the short-delayed schemes, so it is feasible and suitable for APC. © 2011 IEEE. Source


Liu Y.,Beijing University of Posts and Telecommunications | Li J.,Beijing University of Posts and Telecommunications | Sun Q.,Beijing University of Posts and Telecommunications | Zhang H.,Radar and EW Institute
Advances in Information Sciences and Service Sciences | Year: 2012

IETF has developed the NEtwork MObility Basic Support (NEMO BS) protocol to handle mobility of an entire mobile network and it is considered as a basic solution of aeronautical communication. If this NEMO BS used in Aeronautical Passenger Communications (APC) environment, the basic protocol and the existing route optimization (RO) schemes of it may face some problems such as high end-to-end delay, high signaling overhead or high load of the home agent. In this paper, a brief analysis of NEMO RO in APC is given and a scheme named APCRO is presented to optimize the route of NEMO especially for APC. The key points of our mechanism include: 1) establish an Access Router (AR) to correspondent node (CN) RO scheme to optimize the path on the ground network and 2) update the user's location by the home agent of the mobile router. The evaluation and the comparison with other mechanism illustrate the end-to-end delay of the proposed scheme is as low as possible, in addition, the signaling overhead on the air-to-ground wireless channel in APCRO is the smallest among schemes which have the similar end-to-end delay. So APCRO is feasible and suitable for APC environment. Source

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