{"title":"Performance improvement in DS-spread spectrum CDMA systems using a pre- and a post-RAKE","authors":"A. Barreto, G. Fettweis","doi":"10.1109/IZSBC.2000.829226","DOIUrl":null,"url":null,"abstract":"Mobile communications systems based on code division multiple access (CDMA) and direct sequence spread spectrum techniques have been gaining a lot of ground lately. The RAKE receiver is a well known technique in spread spectrum systems, which is used to obtain signal diversity in multipath environments. In TDD systems, a technique known as pre-RAKE has been proposed recently, in which the signal processing is transferred to the transmitter, and it has been shown that this technique provides a capacity increase in the downlink. In this paper we propose a combination of both methods and show that a substantial performance improvement can be reached this way.","PeriodicalId":409898,"journal":{"name":"2000 International Zurich Seminar on Broadband Communications. Accessing, Transmission, Networking. Proceedings (Cat. No.00TH8475)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2000-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"36","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2000 International Zurich Seminar on Broadband Communications. Accessing, Transmission, Networking. Proceedings (Cat. No.00TH8475)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IZSBC.2000.829226","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 36
Abstract
Mobile communications systems based on code division multiple access (CDMA) and direct sequence spread spectrum techniques have been gaining a lot of ground lately. The RAKE receiver is a well known technique in spread spectrum systems, which is used to obtain signal diversity in multipath environments. In TDD systems, a technique known as pre-RAKE has been proposed recently, in which the signal processing is transferred to the transmitter, and it has been shown that this technique provides a capacity increase in the downlink. In this paper we propose a combination of both methods and show that a substantial performance improvement can be reached this way.