{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,30]],"date-time":"2026-01-30T05:42:38Z","timestamp":1769751758522,"version":"3.49.0"},"reference-count":26,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2023,6,13]],"date-time":"2023-06-13T00:00:00Z","timestamp":1686614400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Key R&amp;D Program of China","award":["2021YFB2900500"],"award-info":[{"award-number":["2021YFB2900500"]}]},{"name":"National Key R&amp;D Program of China","award":["62271380"],"award-info":[{"award-number":["62271380"]}]},{"name":"National Key R&amp;D Program of China","award":["62171356"],"award-info":[{"award-number":["62171356"]}]},{"name":"National Natural Science Foundation of China","award":["2021YFB2900500"],"award-info":[{"award-number":["2021YFB2900500"]}]},{"name":"National Natural Science Foundation of China","award":["62271380"],"award-info":[{"award-number":["62271380"]}]},{"name":"National Natural Science Foundation of China","award":["62171356"],"award-info":[{"award-number":["62171356"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Entropy"],"abstract":"<jats:p>To improve the decoding performance of asynchronous sparse code multiple access (SCMA) systems over additive white Gaussian noise (AWGN) channels, this paper proposes a novel windowed joint detection and decoding algorithm for a rate-compatible (RC), LDPC code-based, incremental redundancy (IR) hybrid automatic repeat quest (HARQ) scheme. Since incremental decoding can exchange information iteratively with the detections made at previous consecutive time units, we propose a windowed joint detection and decoding algorithm. The extrinsic information exchanging process is performed between the decoders and the previous w detectors at different consecutive time units. Simulation results show that the sliding-window IR-HARQ scheme for the SCMA system outperforms the original IR-HARQ scheme with a joint detection and decoding algorithm. The throughput of the SCMA system with the proposed IR-HARQ scheme is also improved.<\/jats:p>","DOI":"10.3390\/e25060930","type":"journal-article","created":{"date-parts":[[2023,6,14]],"date-time":"2023-06-14T02:26:56Z","timestamp":1686709616000},"page":"930","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Windowed Joint Detection and Decoding with IR-HARQ for Asynchronous SCMA Systems"],"prefix":"10.3390","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0928-3011","authenticated-orcid":false,"given":"Mengsheng","family":"Guan","sequence":"first","affiliation":[{"name":"The State Key Laboratory of Integrated Services Networks, Xidian University, Xi\u2019an 710071, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Min","family":"Zhu","sequence":"additional","affiliation":[{"name":"The State Key Laboratory of Integrated Services Networks, Xidian University, Xi\u2019an 710071, China"},{"name":"Science and Technology on Communication Networks Laboratory, Shijiazhuang 050081, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Baoming","family":"Bai","sequence":"additional","affiliation":[{"name":"The State Key Laboratory of Integrated Services Networks, Xidian University, Xi\u2019an 710071, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,6,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Saito, Y., Kishiyama, Y., Benjebbour, A., Nakamura, T., Li, A., and Higuchi, K. 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