{"title":"基于多径瑞利衰落信道的CDMA信道编码","authors":"A. Correia, F. Cercas","doi":"10.1109/ICPWC.1997.655566","DOIUrl":null,"url":null,"abstract":"This work considers asynchronous DS-CDMA systems with single-user receivers. The focus, is on combined error control/PN sequence spreading. This work shows that the best performance is achieved when all the bandwidth expansion is by error control coding, instead of by PN sequences. This conclusion is valid for all types of fading channels. Comparisons of CDMA systems using different error control schemes are presented, keeping constant the total available bandwidth and the information rate. Both DBPSK and /spl pi//4 DQPSK modulation with noncoherent demodulation are analysed.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"On channel coding for CDMA over multipath Rayleigh fading channels\",\"authors\":\"A. Correia, F. Cercas\",\"doi\":\"10.1109/ICPWC.1997.655566\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This work considers asynchronous DS-CDMA systems with single-user receivers. The focus, is on combined error control/PN sequence spreading. This work shows that the best performance is achieved when all the bandwidth expansion is by error control coding, instead of by PN sequences. This conclusion is valid for all types of fading channels. Comparisons of CDMA systems using different error control schemes are presented, keeping constant the total available bandwidth and the information rate. Both DBPSK and /spl pi//4 DQPSK modulation with noncoherent demodulation are analysed.\",\"PeriodicalId\":166667,\"journal\":{\"name\":\"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)\",\"volume\":\"50 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1997-12-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ICPWC.1997.655566\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICPWC.1997.655566","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
On channel coding for CDMA over multipath Rayleigh fading channels
This work considers asynchronous DS-CDMA systems with single-user receivers. The focus, is on combined error control/PN sequence spreading. This work shows that the best performance is achieved when all the bandwidth expansion is by error control coding, instead of by PN sequences. This conclusion is valid for all types of fading channels. Comparisons of CDMA systems using different error control schemes are presented, keeping constant the total available bandwidth and the information rate. Both DBPSK and /spl pi//4 DQPSK modulation with noncoherent demodulation are analysed.
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