{"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}
引用次数: 1
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.
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