A Track-before-detect algorithm using KA-HT based on target Doppler property

This paper presents a knowledge-aided Hough transform (KA-HT) method based on target Doppler property for Track-before-detect (TBD) to detect dim target in low SNR environments. The method substitutes a point-slope form of Hough transform (HT) with useful prior information for the standard HT, which can avoid the problem of determining the optimum parameter space granularity and carry out the dim target detection in three-dimensional range-Doppler-frame space data. Simulation experiments validate the proposed method.