{"title":"DS/CDMA系统分集组合的最优和次最优多用户检测","authors":"J. Damnjanovic, B. Vojcic","doi":"10.1109/MILCOM.2001.986014","DOIUrl":null,"url":null,"abstract":"In this paper we propose joint multiuser detection and packet combining in conjunction with an error control retransmission protocol to improve throughput in multiuser communications. Multiuser detection utilizes advanced signal processing techniques to demodulate the user's data by exploiting the structure of multiuser interference. Packet combining is an enhancement of the standard automatic repeat request protocol, whereby the erroneous packets are not discarded but preserved and combined with retransmitted ones to improve new decisions. Three schemes - optimum detection of combined packets and two suboptimum multiuser detection schemes - are suggested. Using the Markov chain theory we present a method for throughput calculation. It is shown that the obtained theoretical values closely agree with the simulation results. The proposed packet combining with multiuser detection is an adaptive scheme with considerably improved robustness and capacity.","PeriodicalId":136537,"journal":{"name":"2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277)","volume":"238 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2001-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Optimum and suboptimum multiuser detection for diversity combining in DS/CDMA systems\",\"authors\":\"J. Damnjanovic, B. Vojcic\",\"doi\":\"10.1109/MILCOM.2001.986014\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this paper we propose joint multiuser detection and packet combining in conjunction with an error control retransmission protocol to improve throughput in multiuser communications. Multiuser detection utilizes advanced signal processing techniques to demodulate the user's data by exploiting the structure of multiuser interference. Packet combining is an enhancement of the standard automatic repeat request protocol, whereby the erroneous packets are not discarded but preserved and combined with retransmitted ones to improve new decisions. Three schemes - optimum detection of combined packets and two suboptimum multiuser detection schemes - are suggested. Using the Markov chain theory we present a method for throughput calculation. It is shown that the obtained theoretical values closely agree with the simulation results. The proposed packet combining with multiuser detection is an adaptive scheme with considerably improved robustness and capacity.\",\"PeriodicalId\":136537,\"journal\":{\"name\":\"2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277)\",\"volume\":\"238 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2001-10-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/MILCOM.2001.986014\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/MILCOM.2001.986014","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Optimum and suboptimum multiuser detection for diversity combining in DS/CDMA systems
In this paper we propose joint multiuser detection and packet combining in conjunction with an error control retransmission protocol to improve throughput in multiuser communications. Multiuser detection utilizes advanced signal processing techniques to demodulate the user's data by exploiting the structure of multiuser interference. Packet combining is an enhancement of the standard automatic repeat request protocol, whereby the erroneous packets are not discarded but preserved and combined with retransmitted ones to improve new decisions. Three schemes - optimum detection of combined packets and two suboptimum multiuser detection schemes - are suggested. Using the Markov chain theory we present a method for throughput calculation. It is shown that the obtained theoretical values closely agree with the simulation results. The proposed packet combining with multiuser detection is an adaptive scheme with considerably improved robustness and capacity.
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