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In this paper, a DOA estimation method of more than two co-frequency sources for a coprime vector hydrophone array is proposed. The method is based on vector cross terms (VCTs), making full use of the directivity of channel combinations for vector hydrophones. Based on VCTs, the characteristic data point identification method is conducted and ensures that the bearing data with the characteristic can be preserved. For further interference rejection, the paper designs Queue Selection (QS) method based on inverse beamforming. The influence of grating lobes can be weakened with the QS, further improving the accuracy of direction extraction. The algorithm in this work does not require decoherence processing, and the simulation work shows that it achieves stable DOA estimation with a low signal-to-noise ratio (SNR).<\/jats:p>","DOI":"10.1371\/journal.pone.0285459","type":"journal-article","created":{"date-parts":[[2023,5,9]],"date-time":"2023-05-09T16:50:47Z","timestamp":1683651047000},"page":"e0285459","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":4,"title":["Multiple co-frequency sources DOA estimation for coprime vector sensor arrays"],"prefix":"10.1371","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2547-1736","authenticated-orcid":true,"given":"Xiao","family":"Chen","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hao","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhen","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yujie","family":"Chen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yong","family":"Gao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2023,5,9]]},"reference":[{"issue":"2","key":"pone.0285459.ref001","doi-asserted-by":"crossref","first-page":"573","DOI":"10.1109\/TSP.2010.2089682","article-title":"Sparse sensing with co-prime samplers and arrays","volume":"59","author":"PP Vaidyanathan","year":"2010","journal-title":"IEEE Transactions on Signal Processing"},{"issue":"8","key":"pone.0285459.ref002","doi-asserted-by":"crossref","first-page":"3592","DOI":"10.1109\/TSP.2011.2135348","article-title":"Theory of sparse coprime sensing in multiple dimensions","volume":"59","author":"P Vaidyanathan","year":"2011","journal-title":"IEEE Transactions on Signal Processing"},{"issue":"2","key":"pone.0285459.ref003","doi-asserted-by":"crossref","first-page":"1099","DOI":"10.1109\/TVT.2017.2704610","article-title":"A robust and efficient algorithm for coprime array adaptive beamforming","volume":"67","author":"C Zhou","year":"2017","journal-title":"IEEE Transactions on Vehicular Technology"},{"key":"pone.0285459.ref004","doi-asserted-by":"crossref","unstructured":"Zhang YD, Amin MG, Himed B. 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