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Additionally, the influence of wave velocity is analyzed in terms of <jats:italic>R<\/jats:italic><jats:italic>M<\/jats:italic><jats:italic>S<\/jats:italic><jats:italic>E<\/jats:italic><jats:sub><jats:italic>c<\/jats:italic><\/jats:sub> and the Cramer-Rao bound (CRB) for 1D DOA with the arbitrary cross-linear array is established. The simulation results demonstrate that the proposed algorithm can achieve better performance than the traditional algorithm under the condition of an inaccurate estimate of wave velocity. Compared with the velocity-independent DOA algorithm, it exhibits the feature of low complexity.<\/jats:p>","DOI":"10.1186\/s13634-020-00687-2","type":"journal-article","created":{"date-parts":[[2020,6,16]],"date-time":"2020-06-16T13:03:45Z","timestamp":1592312625000},"update-policy":"http:\/\/dx.doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Velocity-independent and low-complexity method for 1D DOA estimation using an arbitrary cross-linear array"],"prefix":"10.1186","volume":"2020","author":[{"given":"Gengxin","family":"Ning","sequence":"first","affiliation":[]},{"given":"Guangyu","family":"Jing","sequence":"additional","affiliation":[]},{"given":"Xiaopeng","family":"Li","sequence":"additional","affiliation":[]},{"given":"Xuejin","family":"Zhao","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2020,6,16]]},"reference":[{"issue":"3","key":"687_CR1","first-page":"331","volume":"34","author":"D. 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