Array self-position determination methods based on multiple emitter data can avoid significant deviations of vehicle satellite navigation in harsh environments. However, existing array self-position determination methods show decrease in performance under multipath environments. To deal with this problem, we propose an array self-position determination method based on orthogonal grid matching with the spatial differencing method. Specifically, the direction of arrival (DOA) of direct path and multipath signals are respectively estimated by array spatial differencing method. The matching accuracy is enhanced by utilizing the prior information of direct path signal. After calculating correlation coefficients of different sources, estimated angles with high correlation are then classified into the same set. Then, the noise subspace of each angle set is reconstructed and the position is estimated by grid matching with the orthogonal property between the noise subspaces and the characteristic steering vectors. The matching results of redundant angle sets are removed as non-matching items, thus averting positioning deviations. The simulation results demonstrate that the computational complexity of the proposed method is comparable to that of the signal subspace fitting (SSF). Moreover, in terms of positioning precision, the proposed method outperforms multiple signal classification with enhanced spatial smoothing (ESSMUSIC), initial signal fitting (ISF), and SSF.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Array Self-Position Determination Based on Orthogonal Grid Matching Under Multipath Environments


    Contributors:
    Cao, Zhongkang (author) / Li, Jianfeng (author) / Xu, Rui (author) / Li, Pan (author) / Zhang, Xiaofei (author) / Wu, Qihui (author)


    Publication date :

    2025-04-01


    Size :

    1177078 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Multipath map matching ( MMM )

    Kreft,P. / Bosch,Stuttgart,DE | Automotive engineering | 1994


    Multipath Map Matching (M^3)

    Kreft, P. / German Institute of Navigation (DGON) / Royal Institute of Navigation | British Library Conference Proceedings | 1994


    Jitter diversity in multipath environments

    Noprklit,O. / Eggers,P.C. / Nadersen J.B. et al. | Automotive engineering | 1995


    Assessment of multipath in aeronautical environments

    Lentmaier, Michael / Krach, Bernhard / Jost, Thomas et al. | Tema Archive | 2007