乐胖代购免代理版

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Considering the multibeam multicast feature of HTSs, cooperative transmission among beams is involved in to improve the efficiency of the multicast transmission. Since the multicast transmission rate depends on the worst user channel state, all the users experience an unreasonably low rate. In this situation, subgrouping techniques are employed to increase transmission rates of users. A subgrouping\u2010based multicast transmission problem aiming at maximizing the lowest transmission rate of the users is studied to guarantee fairness among users. We formulate the problem as a max\u2013min optimization problem and propose two low\u2010complex subgrouping algorithms for this problem. Additionally, we also consider multicasting in a single beam and devise a two\u2010layer transmission scheme for it. In the performance evaluation part, besides the impact of parameters on subgrouping performance, we analyze the performance and the computational complexity of the proposed algorithms. The results indicate that the two subgrouping algorithms can achieve favorable performance with low complexity.<\/jats:p>","DOI":"10.1002\/sat.1347","type":"journal-article","created":{"date-parts":[[2020,4,27]],"date-time":"2020-04-27T07:36:57Z","timestamp":1587973017000},"page":"108-128","update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Subgrouping\u2010based multicast transmission over high\u2010throughput satellite systems with beam cooperation"],"prefix":"10.1002","volume":"39","author":[{"ORCID":"http:\/\/orcid.org\/0000-0002-4319-4728","authenticated-orcid":false,"given":"Shuo","family":"Zhang","sequence":"first","affiliation":[{"name":"School of Electronics and Information Engineering Harbin Institute of Technology Harbin China"}]},{"given":"Mingchuan","family":"Yang","sequence":"additional","affiliation":[{"name":"School of Electronics and Information Engineering Harbin Institute of Technology Harbin China"}]},{"given":"Yuming","family":"Wei","sequence":"additional","affiliation":[{"name":"School of Electronics and Information Engineering Harbin Institute of Technology Harbin China"}]},{"given":"Qing","family":"Guo","sequence":"additional","affiliation":[{"name":"School of Electronics and Information Engineering Harbin Institute of Technology Harbin China"}]}],"member":"311","published-online":{"date-parts":[[2020,4,27]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1109\/MAES.2019.2916506"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1109\/MAP.2019.2932311"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/sat.1327"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1109\/MSP.2019.2894391"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1109\/TBC.2018.2847438"},{"key":"e_1_2_7_7_1","doi-asserted-by":"crossref","unstructured":"AranitiG OrsinoA CosmasJ MolinaroA IeraA.A low computational\u2010cost subgrouping multicast scheme for emerging 5G\u2010satellite networks. 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