Scale Effect Removal and Range Migration Correction for Hypersonic Target Coherent Detection

Abstract

The detection of hypersonic targets usually confronts range migration (RM) issue before coherent integration (Cl). The traditional methods aiming at correcting RM to obtain Cl mainly considers the narrow-band radar condition. However, with the increasing requirement of far-range detection, the time band-width product, which is corresponding to radar's mean power, should be promoted in actual application. Thus, the echo signal generates the scale effect (SE) at large time bandwidth product situation, influencing the intra and inter pulse integration performance. To eliminate SE and correct RM, this paper proposes an effective algorithm, i.e., scaled location rotation transform (ScLRT). The ScLRT can remove SE to obtain the matching pulse compression (PC) as well as correct RM to complete Cl via the location rotation transform, being implemented by seeking the actual rotation angle. Compared to the traditional coherent detection algorithms, ScLRT can address the SE problem to achieve better detection/estimation capabilities. At last, this paper gives several simulations to assess the viability of ScLRT.