{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T15:02:25Z","timestamp":1753887745433,"version":"3.41.2"},"reference-count":21,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2021,3,24]],"date-time":"2021-03-24T00:00:00Z","timestamp":1616544000000},"content-version":"vor","delay-in-days":82,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Key Program of Scientific Research Plan of Universities in Xinjiang Uygur Autonomous Region of China","award":["XJEDU2020I003"],"award-info":[{"award-number":["XJEDU2020I003"]}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Wireless Communications and Mobile Computing"],"published-print":{"date-parts":[[2021,1]]},"abstract":"<jats:p>Sparse code multiple access (SCMA) has been proposed to obtain high capacity and support massive connections. When combined with the multiple\u2010input multiple\u2010output (MIMO) techniques, the spectrum efficiency of the SCMA system can be further improved. However, the detectors of the MIMO\u2010SCMA system have high computational complexity. For the maximum likelihood (ML) detection, though it is optimal decoding algorithm for the MIMO\u2010SCMA system, the detection complexity would grow exponentially with the number of both the antennas and users increase. In this paper, we consider a space\u2010time block code (STBC) based MIMO\u2010SCMA system where SCMA is used for multiuser access. Besides, we propose a low\u2010complexity utilizing joint message passing algorithm (JMPA) detection, which narrowing the range of superimposed constellation points, called joint message passing algorithm based on sphere decoding (S\u2010JMPA). But for the S\u2010JMPA detector, the augment of the amount of access users and antennas leads to the degradation of decoding performance, the STBC is constructed to compensate the performance loss of the S\u2010JMPA detector and ensure good bit error rate (BER) performance. The simulation results show that the proposed method achieves a close error rate performance to ML, JMPA, and a fast convergence rate. Moreover, compared to the ML detector, it also significantly reduces the detection complexity of the algorithms.<\/jats:p>","DOI":"10.1155\/2021\/8858292","type":"journal-article","created":{"date-parts":[[2021,3,24]],"date-time":"2021-03-24T18:08:22Z","timestamp":1616609302000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["A Low\u2010Complexity and High\u2010Decoding Performance Scheme for the MIMO\u2010SCMA System"],"prefix":"10.1155","volume":"2021","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0189-6211","authenticated-orcid":false,"given":"Wenping","family":"Ge","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9526-5428","authenticated-orcid":false,"given":"Haofeng","family":"Zhang","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0121-6308","authenticated-orcid":false,"given":"Shiqing","family":"Qian","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5649-7691","authenticated-orcid":false,"given":"Lili","family":"Ma","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3243-069X","authenticated-orcid":false,"given":"Gecheng","family":"Zhang","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2021,3,24]]},"reference":[{"key":"e_1_2_9_1_2","doi-asserted-by":"crossref","unstructured":"ChopraK. 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