Adaptive real‐time recursive radial distance‐time plane Hough transform track‐before‐detect algorithm for hypersonic target

Abstract

Under the condition of low signal-to-noise ratio (SNR), the track-before-detect algorithm based on Hough transform (HT-TBD) is an effective means to detect and track hypersonic targets. In view of the problem that the existing HT-TBD algorithms cannot detect hypersonic multi-target in real time and some targets may be missed, an adaptive real-time recursive radial distance-time plane HT-TBD (RTHT-TBD) algorithm for a hypersonic target is proposed in this study. Firstly, RTHT-TBD technology is used to perform the non-coherent integration detection of the first n frames measurement data, and the initial accumulation matrix and storage array are obtained. Then the data of 2~ n + 1, 3~ n + 2, ... frames are processed recursively in turn. In order to solve the problem that the parameter space accumulation matrix cannot accumulate normally when the parameter space accumulation matrix changes in the recursive process, the adaptive technology is used to adjust the parameter space to realise the recursive detection at all times. The simulation results show that the proposed algorithm can realise real-time detection and tracking of hypersonic multi-target under low SNR, and effectively reduce the computational complexity.