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Finding a balance between these two objectives is important in order to achieve a desired sound quality. These measures are introduced as the objectives here. The design can then be obtained via a bi-objective integer programming problem, where the coefficients of the filters are expressed as sums of signed powers-of-two terms. We study two different integer spaces and penalty functions for solving the problem. Then, an algorithm based on a discrete filled function is developed for finding the optimal design. In order to illustrate the effectiveness of the algorithm, real data is used and two broadband beamformers are demonstrated.<\/jats:p>","DOI":"10.1186\/1687-6180-2012-62","type":"journal-article","created":{"date-parts":[[2012,3,9]],"date-time":"2012-03-09T13:14:17Z","timestamp":1331298857000},"update-policy":"http:\/\/dx.doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Design of broadband beamformers with low complexity"],"prefix":"10.1186","volume":"2012","author":[{"given":"Zhiguo","family":"Feng","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cedric Ka Fai","family":"Yiu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kok-Lay","family":"Teo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sven","family":"Nordholm","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2012,3,9]]},"reference":[{"issue":"3","key":"174_CR1","doi-asserted-by":"publisher","first-page":"241","DOI":"10.1109\/89.759030","volume":"7","author":"S Nordholm","year":"1999","unstructured":"Nordholm S, Claesson I, Dahl M: Adaptive microphone array employing calibration signals: an analytical evaluation. 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