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Adv. Signal Process."],"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Accurate beamspace channel estimation is critical in wideband millimeter-wave (mmWave) massive multiple-input multiple-output (MIMO) communication systems. However, the beam squint effect caused by the increase in bandwidth and array dimension can bring additional challenges to the wideband channel estimation. In this study, we propose a wideband channel estimation scheme based on compressed sensing to solve the beam squint effect in broadband mmWave massive MIMO systems. First, the channel estimation problem is transformed into a beamspace direction estimation problem by exploiting the special frequency-dependent sparse structure of a broadband beamspace channel. Then, we propose a beam-band function-based orthogonal matching pursuit algorithm, in which a beam-band function is constructed and used to capture the power of each path component to estimate the spatial direction. In addition, the support of each path component at different sub-carriers is estimated to reduce the influence of the beam squint effect. Moreover, the support is estimated adaptively to improve the estimation accuracy further. Simulation results demonstrate that the proposed scheme reduces the pilot overhead under the beam squint effect and improve the estimation accuracy significantly.<\/jats:p>","DOI":"10.1186\/s13634-022-00949-1","type":"journal-article","created":{"date-parts":[[2022,12,2]],"date-time":"2022-12-02T09:07:28Z","timestamp":1669972048000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["An enhanced beamspace channel estimation algorithm for wideband millimeter-wave massive MIMO systems"],"prefix":"10.1186","volume":"2022","author":[{"given":"Yang","family":"Liu","sequence":"first","affiliation":[]},{"given":"Kaipeng","family":"Song","sequence":"additional","affiliation":[]},{"given":"Yi","family":"Luo","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6904-033X","authenticated-orcid":false,"given":"Ding","family":"Han","sequence":"additional","affiliation":[]},{"given":"Yinghui","family":"Zhang","sequence":"additional","affiliation":[]},{"given":"Minglu","family":"Jin","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2022,12,2]]},"reference":[{"issue":"1","key":"949_CR1","doi-asserted-by":"publisher","first-page":"611","DOI":"10.1109\/COMST.2021.3135119","volume":"24","author":"HA Ammar","year":"2022","unstructured":"H.A. 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