Geometry-Based Bistatic Range Association for Multi-Target Localization in Distributed HFSWR

This letter addresses the bistatic range (BR) association problem for multi-target localization in distributed high frequency surface wave radar (HFSWR). In multi-target localization, a crucial task is to determine the measurement-target association, particularly in the presence of spurious BRs (SBRs). A geometry-based method is proposed by reformulating the problem as the identification of target-consistent intersection point (TCIP) sets formed by BR ellipses from the same target. All ellipse intersections are partitioned into classes, and valid TCIP sets are identified through sequential search and final screening based on parent-ellipse consistency and set compactness. Numerical results show that the proposed method provides more accurate and robust BR association than benchmark methods.