Authors
Fan Xu, Feng Luo, Zixuan He, Jiahao Han, Wanyao Wu, Linrang Zhang
Published in
Sensors (Basel, Switzerland). Volume 26. Issue 20. Oct 11, 2026. Epub Oct 11, 2026.
Abstract
This paper addresses the fundamental power-budget limitation of global navigation satellite system (GNSS)-based passive radar in aircraft detection and localization by exploiting multiple satellite illuminators for spatiotemporal hybrid integration. In contrast to single illuminator operation, cross-link coupling effects, manifested as disparate range and Doppler signatures across individual bistatic links, pose a formidable barrier to coherent energy combination. To surmount this challenge, we first introduce a unified kinematic vector (UKV) that projects the target state into a link decoupled common domain. The UKV encapsulates the target direction of arrival (DOA) and monostatic range, three parameters that remain approximately invariant across all bistatic links sharing a common receiver. Building upon the UKV, we develop an interlink range scaling alignment (IRSA) algorithm that coherently integrates target returns along a UKV-constrained trajectory and project the accumulated energy onto a shared monostatic-range, zero-Doppler grid. This registration aligns target responses from disparate links at a unified spatial coordinate, thereby enabling genuine signal-level fusion across illuminators. When applied across multiple coherent frames, UKV-IRSA elevates sub-noise target energy to clearly detectable levels. Extensive numerical simulations and real-data experiments corroborate the efficacy of the proposed approach.
PMID:
42944285
Bibliographic data and abstract were imported from PubMed on 27 Oct 2026.
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