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Based on this, this paper proposes an improved low-complexity hybrid beamforming grouping sum-rate maximization (HBG-SRM) algorithm to achieve system sum-rate maximization under the premise that both BS and user side use hybrid beamforming architecture and the channel state information (CSI) of the downlink channel is perfect. The algorithm first predefines a relevant threshold value, which is used to group multiusers; then, the user uses the maximum likelihood (ML) criterion to identify the optimal beam and estimate its beamforming gain within each group, and finally, the user compares all the candidate optimal beam gains between each group to confirm the optimal beamforming vector. The simulation results also verify the superiority of the proposed algorithm\u2019s sum-rate over other algorithms.<\/jats:p>","DOI":"10.1155\/2022\/2865659","type":"journal-article","created":{"date-parts":[[2022,2,10]],"date-time":"2022-02-10T17:50:09Z","timestamp":1644515409000},"page":"1-12","source":"Crossref","is-referenced-by-count":2,"title":["Hybrid Beamforming Grouping Sum-Rate Maximization Algorithm for Multiuser mmWave Massive MIMO Systems"],"prefix":"10.1155","volume":"2022","author":[{"given":"Jian","family":"Liu","sequence":"first","affiliation":[{"name":"College of Information Science and Engineering, Jishou University, Jishou 416000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xuan","family":"Yang","sequence":"additional","affiliation":[{"name":"College of Information Science and Engineering, Jishou University, Jishou 416000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qianfang","family":"Sun","sequence":"additional","affiliation":[{"name":"College of Information Science and Engineering, Jishou University, Jishou 416000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1019-6735","authenticated-orcid":true,"given":"Renmin","family":"Zhang","sequence":"additional","affiliation":[{"name":"College of Information Science and Engineering, Jishou University, Jishou 416000, China"},{"name":"Hunan Provincial Key Lab. of Intelligent Control Technology for Ecological Agriculture in Wuling Mountain Area, Huaihua University, Huaihua 418000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9039-1137","authenticated-orcid":true,"given":"Yingjing","family":"Qian","sequence":"additional","affiliation":[{"name":"College of Information Science and Engineering, Jishou University, Jishou 416000, China"},{"name":"Hunan Provincial Key Lab. of Intelligent Control Technology for Ecological Agriculture in Wuling Mountain Area, Huaihua University, Huaihua 418000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","reference":[{"key":"1","doi-asserted-by":"publisher","DOI":"10.1109\/JSTSP.2016.2523924"},{"key":"2","first-page":"207","article-title":"A Coherent Hybrid Precoding for homogenize Millimeter-wave Multiple- in Multiple- out Systems for 5G Communication","author":"B. 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