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In this study, the authors consider the coupled sequential detection and estimation of weak targets for track-before-detect algorithm in long range early warning radar. They present a new strategy and develop a coupled cost function consisting of detection, position estimation and tracking estimation loss. In the proposed procedure, the sequential stopping and detection rules are simplified. Moreover,...
This paper considers the coherent integration problem for a maneuvering target with jerk motion, involving range migration (RM) and Doppler frequency migration (DFM) within the coherent integration period. A fast non-searching method based on adjacent cross correlation function (ACCF) is proposed to realize the coherent accumulation, where two adjacent cross correlation operations are employed to...
This paper considers the range migration correction problem for realizing the coherent integration of a maneuvering target's energy, involving range walk and range curvature within the coherent integration period. A range migration correction algorithm based on the generalized keystone transform (GKT) is proposed, where two GKT operations and fold factor phase term compensation are employed to remove...
Dynamic programming algorithm is an effective track before detect method. It recovers target trajectory at the same time as the detection is declared after processing several successive frames of measurement. This paper simulates the tracking accuracy of each frame of trajectory which is recovered from the maximum of merit function after executing dynamic programming. Several useful results for improving...
A new algorithm of range ambiguity resolution is presented which is substantially different from previously proposed algorithms. The algorithm utilizes a constant pulse repetition frequency (PRF). Firstly, a merit function is designed according to the moving characteristics of the targets. Secondly, range ambiguity resolution is achieved by minimizing the merit function. Numerical simulation results...
In early-warning radar surveillance environment, sequential procedures are preferred to detect the targets, for they promise a reduction in the time needed to take a decision. In this paper, a sequential detection algorithm is concerned and the interplay between the parameter dsnr and the system performance is mainly discussed. Numerical results have shown that sequential detector can lead a great...
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