{"title":"酉变换在准闭环发射分集系统中的应用","authors":"G. Mandyam","doi":"10.1109/ACSSC.2000.910924","DOIUrl":null,"url":null,"abstract":"Previous work in mobile wireless communications systems has centered on the use of closed-loop transmit diversity to increase performance in fading channels. Closed-loop transmit diversity methods, which employ feedback of optimal weighting vectors so as to pre-weight transmitted symbols from multiple antennas, suffer from two problems: (1) degradation at high mobile velocities due to limited-rate feedback, and (2) increasing feedback information rate with increasing number of transmit antennas. A method of closed-loop transmit diversity which addresses both of the problems listed above is presented based on the use of unitary transformations for transmitter diversity.","PeriodicalId":10581,"journal":{"name":"Conference Record of the Thirty-Fourth Asilomar Conference on Signals, Systems and Computers (Cat. No.00CH37154)","volume":"82 1","pages":"97-101 vol.1"},"PeriodicalIF":0.0000,"publicationDate":"2000-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Application of unitary transforms to quasi-closed-loop transmit diversity systems\",\"authors\":\"G. Mandyam\",\"doi\":\"10.1109/ACSSC.2000.910924\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Previous work in mobile wireless communications systems has centered on the use of closed-loop transmit diversity to increase performance in fading channels. Closed-loop transmit diversity methods, which employ feedback of optimal weighting vectors so as to pre-weight transmitted symbols from multiple antennas, suffer from two problems: (1) degradation at high mobile velocities due to limited-rate feedback, and (2) increasing feedback information rate with increasing number of transmit antennas. A method of closed-loop transmit diversity which addresses both of the problems listed above is presented based on the use of unitary transformations for transmitter diversity.\",\"PeriodicalId\":10581,\"journal\":{\"name\":\"Conference Record of the Thirty-Fourth Asilomar Conference on Signals, Systems and Computers (Cat. No.00CH37154)\",\"volume\":\"82 1\",\"pages\":\"97-101 vol.1\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2000-10-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Conference Record of the Thirty-Fourth Asilomar Conference on Signals, Systems and Computers (Cat. No.00CH37154)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ACSSC.2000.910924\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Conference Record of the Thirty-Fourth Asilomar Conference on Signals, Systems and Computers (Cat. No.00CH37154)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ACSSC.2000.910924","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Application of unitary transforms to quasi-closed-loop transmit diversity systems
Previous work in mobile wireless communications systems has centered on the use of closed-loop transmit diversity to increase performance in fading channels. Closed-loop transmit diversity methods, which employ feedback of optimal weighting vectors so as to pre-weight transmitted symbols from multiple antennas, suffer from two problems: (1) degradation at high mobile velocities due to limited-rate feedback, and (2) increasing feedback information rate with increasing number of transmit antennas. A method of closed-loop transmit diversity which addresses both of the problems listed above is presented based on the use of unitary transformations for transmitter diversity.
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