Left–Right Ambiguity Resolution Methods for Closely Spaced Arrays

Nair, Baiju M; Kumar, Arun; Bahl, Rajendar

doi:10.1109/joe.2021.3115900

Cited by 4 publications

(1 citation statement)

References 29 publications

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“…Groen et al [5] addressed the port and starboard discrimination problem according to the time difference of the signal arriving at the triplet sonar arrays. Utilizing a designed second-order nulling beamformer, Nair et al [6] promoted the port-starboard rejection ratio in twin closely spaced ULA. Stinco at al [7] focused on promoting port-starboard rejection ratio in triplet arrays and presented a new beamforming algorithm with twist compensation.…”

Section: Introductionmentioning

confidence: 99%

Underwater multi-source DOA tracking using uniform linear array based on improved GM-PHD filter

Zhang

Liang

et al. 2023

Meas. Sci. Technol.

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Uniform linear array (ULA) is commonly used for collecting underwater acoustic signals, and the direction-of-arrival (DOA) is obtained by array signal processing methods. The ULA-based multi-source DOA tracking suffers from the performance degradation caused by the presence of false tracks from port-starboard ambiguity. To address this problem, we propose a bearing ambiguity discrimination algorithm. Firstly, the sum of real bearing motion velocity between truth and ambiguous targets is established with the Gaussian distribution. Secondly, an improved Gaussian mixture probability hypothesis density (GM-PHD) filter, which can adaptively generate target birth intensity, is utilized to select truth and ambiguous bearings generated by the same target from the estimated posterior intensity. Thirdly, truth and ambiguous bearings are discriminated according to the fact that the change of array heading will lead to a significant change in ambiguous bearing. Simulation and real experimental results illustrate that the proposed algorithm can provide unambiguous target-generated tracks and accurately estimate the number of targets.

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Section: Introductionmentioning

confidence: 99%