M. G. Bakulin, T. B. K. Ben Rejeb, V. B. Kreyndelin, D. Yu. Pankratov, A. E. Smirnov
{"title":"New Kind of Mother Constellation for SCMA Systems","authors":"M. G. Bakulin, T. B. K. Ben Rejeb, V. B. Kreyndelin, D. Yu. Pankratov, A. E. Smirnov","doi":"10.1134/s1064226923140048","DOIUrl":null,"url":null,"abstract":"<p><b>Abstract</b>—Sparse code multiple access (SCMA) is a variation of the nonorthogonal multiple access (NOMA) technology. SCMA communication systems use codebooks based on multidimensional constellations, which are generated using original mother constellations. The properties of these constellations largely determine the efficiency of SCMA communication systems. This paper proposes new mother constellations for use in SCMA systems. The proposed constellations were synthesized using a new analytical method for describing tabular functions in the form of a functional dependence of the signal on the vector of binary variables. This representation made it possible to reveal some patterns and determine the characteristics of constellations that affect the efficiency of their use. In particular, a new type of two-dimensional constellation with a parametric description, called Arrow constellations, is proposed. The proposed constellations belong to the class of multidimensional constellations and can be used both independently and in codebook synthesis in SCMA systems. The best effect from using these constellations is observed in SCMA systems with a turbo receiver, in which both the demodulator and the decoder are operated with the same feedback.</p>","PeriodicalId":50229,"journal":{"name":"Journal of Communications Technology and Electronics","volume":"61 1","pages":""},"PeriodicalIF":0.4000,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Communications Technology and Electronics","FirstCategoryId":"94","ListUrlMain":"https://doi.org/10.1134/s1064226923140048","RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract—Sparse code multiple access (SCMA) is a variation of the nonorthogonal multiple access (NOMA) technology. SCMA communication systems use codebooks based on multidimensional constellations, which are generated using original mother constellations. The properties of these constellations largely determine the efficiency of SCMA communication systems. This paper proposes new mother constellations for use in SCMA systems. The proposed constellations were synthesized using a new analytical method for describing tabular functions in the form of a functional dependence of the signal on the vector of binary variables. This representation made it possible to reveal some patterns and determine the characteristics of constellations that affect the efficiency of their use. In particular, a new type of two-dimensional constellation with a parametric description, called Arrow constellations, is proposed. The proposed constellations belong to the class of multidimensional constellations and can be used both independently and in codebook synthesis in SCMA systems. The best effect from using these constellations is observed in SCMA systems with a turbo receiver, in which both the demodulator and the decoder are operated with the same feedback.
期刊介绍：
Journal of Communications Technology and Electronics is a journal that publishes articles on a broad spectrum of theoretical, fundamental, and applied issues of radio engineering, communication, and electron physics. It publishes original articles from the leading scientific and research centers. The journal covers all essential branches of electromagnetics, wave propagation theory, signal processing, transmission lines, telecommunications, physics of semiconductors, and physical processes in electron devices, as well as applications in biology, medicine, microelectronics, nanoelectronics, electron and ion emission, etc.
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