DOA Estimation of Coherent Signals Based on Coherent Accumulation Vector

Qi, Bingbing; Liu, Dunge

doi:10.1007/s11277-022-09664-4

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…Furthermore, similar to the spatial smoothing, because of the increased spatial smoothing number, the MTOPE method will achieve better DOA estimation performance when compared to the FB-PTMR method. However, the estimation accuracy of the reconstructed matrix for the FB-PTMR and MTOEP methods may become poor under a low SNR, which further results in degradation of the DOA estimation performance (Qi, 2022; Qi and Li, 2021; Qi and Liu, 2021, 2022).…”

Section: Toeplitz Matrix Reconstruction Methodsmentioning

confidence: 99%

Improved multiple-Toeplitz matrices reconstruction method using quadratic spatial smoothing for coherent signals DOA estimation

Qi,

Xu,

Liu

2024

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PurposeThe purpose of this paper is to exploit the multiple-Toeplitz matrices reconstruction method combined with quadratic spatial smoothing processing to improve the direction-of-arrival (DOA) estimation performance of coherent signals at low signal-to-noise ratio (SNRs).Design/methodology/approachAn improved multiple-Toeplitz matrices reconstruction method is proposed via quadratic spatial smoothing processing. Our proposed method takes advantage of the available information contained in the auto-covariance matrices of individual Toeplitz matrices and the cross-covariance matrices of different Toeplitz matrices, which results in a higher noise suppression ability.FindingsTheoretical analysis and simulation results show that, compared with the existing Toeplitz matrix processing methods, the proposed method improves the DOA estimation performance in cases with a low SNR. Especially for the cases with a low SNR and small snapshot number as well as with closely spaced sources, the proposed method can achieve much better performance on estimation accuracy and resolution probability.Research limitations/implicationsThe study investigates the possibility of reusing pre-existing designs for the DOA estimation of the coherent signals. The proposed technique enables achieve good estimation performance at low SNRs.Practical implicationsThe paper includes implications for the DOA problem at low SNRs in communication systems.Originality/valueThe proposed method proved to be useful for the DOA estimation at low SNR.

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