{"title":"作为第三代CDMA系统的扩展，基于循环扩展码的多码CDM传输方案的性能分析","authors":"N. Oda, H. Harada, I. Sasase, Y. Hase","doi":"10.1109/ICPWC.1997.655537","DOIUrl":null,"url":null,"abstract":"This paper proposes an adaptive multi-code CDM transmission scheme for the multipath fading environment to achieve high code utilization efficiency. In the proposed system, we apply a new parallel transmission scheme using cyclic codes generated from a modified M-sequence which inserts the guard chips before and after an M-sequence. Moreover with radio channel estimation results obtained from the downlink by this multi-code CDM transmission scheme, the number of guard chips is varied adaptively on the uplink. In a micro cellular system, the performances of the proposed system are evaluated by computer simulation. As a result, it is essential for high quality broadband mobile communications to apply adaptive transmission to the new multi-code CDM transmission system.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Performance analysis of a multi-code CDM transmission scheme based on cyclic extended spread code as a extension of 3rd generation CDMA system\",\"authors\":\"N. Oda, H. Harada, I. Sasase, Y. Hase\",\"doi\":\"10.1109/ICPWC.1997.655537\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This paper proposes an adaptive multi-code CDM transmission scheme for the multipath fading environment to achieve high code utilization efficiency. In the proposed system, we apply a new parallel transmission scheme using cyclic codes generated from a modified M-sequence which inserts the guard chips before and after an M-sequence. Moreover with radio channel estimation results obtained from the downlink by this multi-code CDM transmission scheme, the number of guard chips is varied adaptively on the uplink. In a micro cellular system, the performances of the proposed system are evaluated by computer simulation. As a result, it is essential for high quality broadband mobile communications to apply adaptive transmission to the new multi-code CDM transmission system.\",\"PeriodicalId\":166667,\"journal\":{\"name\":\"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)\",\"volume\":\"78 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.1997.655537\",\"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.1997.655537","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Performance analysis of a multi-code CDM transmission scheme based on cyclic extended spread code as a extension of 3rd generation CDMA system
This paper proposes an adaptive multi-code CDM transmission scheme for the multipath fading environment to achieve high code utilization efficiency. In the proposed system, we apply a new parallel transmission scheme using cyclic codes generated from a modified M-sequence which inserts the guard chips before and after an M-sequence. Moreover with radio channel estimation results obtained from the downlink by this multi-code CDM transmission scheme, the number of guard chips is varied adaptively on the uplink. In a micro cellular system, the performances of the proposed system are evaluated by computer simulation. As a result, it is essential for high quality broadband mobile communications to apply adaptive transmission to the new multi-code CDM transmission system.
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