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Different from the previous approaches, the beam-domain data from multiple adjacent pointing angles are combined in a way that the displacement invariance structure required by ESPRIT is maintained. It is intended to further obtain a sub-beamwidth resolution for a conventional multi-beam system already having small beamwidths. Computer simulations show that for typical multi-beam system applications the new approach provides improved estimation mean-square errors over the original ESPRIT, on top of reduced requirements for signal-to-noise ratio, number of snapshots, and computational time.<\/jats:p>","DOI":"10.1186\/1687-6180-2012-152","type":"journal-article","created":{"date-parts":[[2012,7,20]],"date-time":"2012-07-20T11:47:30Z","timestamp":1342784850000},"update-policy":"http:\/\/dx.doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["ESPRIT with multiple-angle subarray beamforming"],"prefix":"10.1186","volume":"2012","author":[{"given":"Wen","family":"Xu","sequence":"first","affiliation":[]},{"given":"Ying","family":"Jiang","sequence":"additional","affiliation":[]},{"given":"Huiquan","family":"Zhang","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2012,7,20]]},"reference":[{"issue":"2","key":"316_CR1","first-page":"25","volume":"65","author":"C de Moustier","year":"1988","unstructured":"de Moustier C: State of the art in swath bathymetry survey systems. 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