{"title":"上行通信系统的GDMA, LDS-CDMA和HDS-CDMA","authors":"Mao-Chao Lin, Shih-Kai Lee, H. Fan, Yi-Hua Chen","doi":"10.1109/APWCS60142.2023.10234063","DOIUrl":null,"url":null,"abstract":"Gain division multiple access (GDMA) and low-density spreading code division multiple access (LDS-CDMA) are non-orthogonal multiple access methods that can be applied to the uplink communication system, where each user transmits its message to a common base station through an independent fading channel. We may interpret the LDS-CDMA scheme as a combination of several dependent GDMA systems, where a GDMA system is applied to each resource. The original message passing for LDS-CDMA may also be interpreted as the message passing among various GDMA systems to employ the dependency. We extend the interpretation to construct high-density (HDS) CDMA schemes. The advantage of HDS-CDMA schemes can be the requirement of a smaller number of resources or better error performances.","PeriodicalId":375211,"journal":{"name":"2023 VTS Asia Pacific Wireless Communications Symposium (APWCS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"GDMA, LDS-CDMA, and HDS-CDMA for Uplink Communication Systems\",\"authors\":\"Mao-Chao Lin, Shih-Kai Lee, H. Fan, Yi-Hua Chen\",\"doi\":\"10.1109/APWCS60142.2023.10234063\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Gain division multiple access (GDMA) and low-density spreading code division multiple access (LDS-CDMA) are non-orthogonal multiple access methods that can be applied to the uplink communication system, where each user transmits its message to a common base station through an independent fading channel. We may interpret the LDS-CDMA scheme as a combination of several dependent GDMA systems, where a GDMA system is applied to each resource. The original message passing for LDS-CDMA may also be interpreted as the message passing among various GDMA systems to employ the dependency. We extend the interpretation to construct high-density (HDS) CDMA schemes. The advantage of HDS-CDMA schemes can be the requirement of a smaller number of resources or better error performances.\",\"PeriodicalId\":375211,\"journal\":{\"name\":\"2023 VTS Asia Pacific Wireless Communications Symposium (APWCS)\",\"volume\":\"1 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2023-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2023 VTS Asia Pacific Wireless Communications Symposium (APWCS)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/APWCS60142.2023.10234063\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2023 VTS Asia Pacific Wireless Communications Symposium (APWCS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/APWCS60142.2023.10234063","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
GDMA, LDS-CDMA, and HDS-CDMA for Uplink Communication Systems
Gain division multiple access (GDMA) and low-density spreading code division multiple access (LDS-CDMA) are non-orthogonal multiple access methods that can be applied to the uplink communication system, where each user transmits its message to a common base station through an independent fading channel. We may interpret the LDS-CDMA scheme as a combination of several dependent GDMA systems, where a GDMA system is applied to each resource. The original message passing for LDS-CDMA may also be interpreted as the message passing among various GDMA systems to employ the dependency. We extend the interpretation to construct high-density (HDS) CDMA schemes. The advantage of HDS-CDMA schemes can be the requirement of a smaller number of resources or better error performances.