摘要 :
A new algorithm based on directional cumulation is presented to detect the trajectory of moving point target from image sequences in low SNR environments. First, single frame detection is performed, and then the logical "or" opera...
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A new algorithm based on directional cumulation is presented to detect the trajectory of moving point target from image sequences in low SNR environments. First, single frame detection is performed, and then the logical "or" operation of multiple frames are used to obtain a binary planar projective image. With that based on the continuity of the moving trajectory of the point target, the second detection using directional cumulation is performed to acquire the trajectory of the target and its parameters. The result of experiments shows that the proposed method is effective to detect and track targets moving along linear or curvilinear trajectory with unrestricted velocity in low SNR, and it is of low complexity.
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摘要 :
A new algorithm based on directional cumulation is presented to detect the trajectory of moving point target from image sequences in low SNR environments. First, single frame detection is performed, and then the logical "or" opera...
展开
A new algorithm based on directional cumulation is presented to detect the trajectory of moving point target from image sequences in low SNR environments. First, single frame detection is performed, and then the logical "or" operation of multiple frames are used to obtain a binary planar projective image. With that based on the continuity of the moving trajectory of the point target, the second detection using directional cumulation is performed to acquire the trajectory of the target and its parameters. The result of experiments shows that the proposed method is effective to detect and track targets moving along linear or curvilinear trajectory with unrestricted velocity in low SNR, and it is of low complexity.
收起
摘要 :
A new algorithm based on directional cumulation is presented to detect the trajectory of moving point target from image sequences in low SNR environments. First, single frame detection is performed, and then the logical "or" opera...
展开
A new algorithm based on directional cumulation is presented to detect the trajectory of moving point target from image sequences in low SNR environments. First, single frame detection is performed, and then the logical "or" operation of multiple frames are used to obtain a binary planar projective image. With that based on the continuity of the moving trajectory of the point target, the second detection using directional cumulation is performed to acquire the trajectory of the target and its parameters The result of experiments shows that the proposed method is effective to detect and track targets moving along linear or curvilinear trajectory with unrestricted velocity in low SNR, and it is of low complexity.
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摘要 :
In this paper, a new beamformer is proposed for coherent signal reception with the assumption that the directions-of-arrival (DOA's) of the uncorrelated interferers are available. Here, the composite vector of the coherent sources...
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In this paper, a new beamformer is proposed for coherent signal reception with the assumption that the directions-of-arrival (DOA's) of the uncorrelated interferers are available. Here, the composite vector of the coherent sources is first estimated based on the use of a transformation matrix to eliminate the uncorrelated interferers. Then the optimum beamforming is performed based on the estimated composite vector and the eigenstructure of the array correlation matrix. Experimental results show that the proposed beamformer achieves the optimum performance and rapidly converges.
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摘要 :
In this paper, a new beamformer is proposed for coherent signal reception with the assumption that the directions-of-arrival (DOA's) of the uncorrelated interferers are available. Here, the composite vector of the coherent sources...
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In this paper, a new beamformer is proposed for coherent signal reception with the assumption that the directions-of-arrival (DOA's) of the uncorrelated interferers are available. Here, the composite vector of the coherent sources is first estimated based on the use of a transformation matrix to eliminate the uncorrelated interferers. Then the optimum beamforming is performed based on the estimated composite vector and the eigenstructure of the array correlation matrix. Experimental results show that the proposed beamformer achieves the optimum performance and rapidly converges.
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摘要 :
In this paper, a new beamformer is proposed for coherent signal reception with the assumption that the directions-of-arrival (DOA's) of the uncorrelated interferers are available. Here, the composite vector of the coherent sources...
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In this paper, a new beamformer is proposed for coherent signal reception with the assumption that the directions-of-arrival (DOA's) of the uncorrelated interferers are available. Here, the composite vector of the coherent sources is first estimated based on the use of a transformation matrix to eliminate the uncorrelated interferers. Then the optimum beamforming is performed based on the estimated composite vector and the eigenstructure of the array correlation matrix. Experimental results show that the proposed beamformer achieves the optimum performance and rapidly converges.
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摘要 :
A new energy integration detection scheme is proposed to detect an unknown nonlinear frequency modulated (FM) signal buried in strong complex additive white Gaussian noise (CAWGN). In this scheme, the Smoothed-Pseudo Wigner-Vill D...
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A new energy integration detection scheme is proposed to detect an unknown nonlinear frequency modulated (FM) signal buried in strong complex additive white Gaussian noise (CAWGN). In this scheme, the Smoothed-Pseudo Wigner-Vill Distribution (SPWVD) is used to realize local coherent integration of a signal and thresholding and mathematical morphological filtering are jointly used to extract the time-frequency (TF) support region of the signal from the time-frequency distribution (TFD) image of an observation. The simulated results show that the proposed scheme is effective in strong noise background. The scheme can be applied to the target detection in the over-the-horizon radar (OTHR), such as the sky wave OTHR and the surface wave OTHR.
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摘要 :
In this paper, a new three-stage beamformer is proposed for reception of coherent signals with the assumption that the directions-of-arrivals (DOA's) of the uncorrelated interferers have been estimated a priori. First, the estimat...
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In this paper, a new three-stage beamformer is proposed for reception of coherent signals with the assumption that the directions-of-arrivals (DOA's) of the uncorrelated interferers have been estimated a priori. First, the estimated DOA's of the uncorrelated interferers are used to construct a transformation matrix. Secondly, the composite vector of the coherent sources is estimated based on the transformation matrix. Finally, using the estimated composite vector and the array correlation matrix, adaptive beamforming is performed. Experimental results show that the proposed beamformer almost achieves the optimum performance and rapidly converges. Finally, we also discuss how to counteract DOA error by high-order constraints.
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摘要 :
In this paper, a new three-stage beamformer is proposed for reception of coherent signals with the assumption that the directions-of-arrivals (DOA's) of the uncorrelated interferers have been estimated a priori. First, the estimat...
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In this paper, a new three-stage beamformer is proposed for reception of coherent signals with the assumption that the directions-of-arrivals (DOA's) of the uncorrelated interferers have been estimated a priori. First, the estimated DOA's of the uncorrelated interferers are used to construct a transformation matrix. Secondly, the composite vector of the coherent sources is estimated based on the transformation matrix. Finally, using the estimated composite vector and the array correlation matrix, adaptive beamforming is performed. Experimental results show that the proposed beamformer almost achieves the optimum performance and rapidly converges. Finally, we also discuss how to counteract DOA error by high-order constraints.
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摘要 :
In this paper, a new three-stage beamformer is proposed for reception of coherent signals with the assumption that the directions-of-arrivals (DOA's) of the uncorrelated interferers have been estimated a priori. First, the estimat...
展开
In this paper, a new three-stage beamformer is proposed for reception of coherent signals with the assumption that the directions-of-arrivals (DOA's) of the uncorrelated interferers have been estimated a priori. First, the estimated DOA's of the uncorrelated interferers are used to construct a transformation matrix. Secondly, the composite vector of the coherent sources is estimated based on the transformation matrix. Finally, using the estimated composite vector and the array correlation matrix, adaptive beamforming is performed. Experimental results show that the proposed beamformer almost achieves the optimum performance and rapidly converges. Finally, we also discuss how to counteract DOA error by high-order constraints.
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