{"title":"基于相关MIMO信道的PU2RC/OFDMA系统CQI反馈与用户分配方案","authors":"Myeon-gyun Cho","doi":"10.1109/WTS.2010.5479649","DOIUrl":null,"url":null,"abstract":"On the multi-antenna broadcast channel, Space division multiple access (SDMA) extracts the multiplexing gain by transmitting multiuser packets simultaneously to maximize the system throughput. This paper considers a practical design called per user unitary and rate control (PU2RC) in order to achieve the multi-user diversity (MUDiv) for SDMA with the reasonable feedback burden. However, PU2RC/OFDMA needs to feedback the preferred precoding index and its CQIs per resource unit, chunk. Moreover, it has a defect in scheduling the streams using user grouping and is difficult to achieve MUDiv fully. In order to overcome these drawbacks, we employ transmitter controlled precoding and opportunistic feedback (TCP-OFB) in conjunction with frequency scheduling for single-user and multi-user allocation. Numerical results shows that the proposed scheme achieves comparable performance to conventional PU2RC/OFDMA with a far reduced feedback load in any user allocation and antenna correlation scenarios.","PeriodicalId":117027,"journal":{"name":"2010 Wireless Telecommunications Symposium (WTS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":"{\"title\":\"A novel CQI feedback and user allocation scheme for PU2RC/OFDMA systems in correlated MIMO channels\",\"authors\":\"Myeon-gyun Cho\",\"doi\":\"10.1109/WTS.2010.5479649\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"On the multi-antenna broadcast channel, Space division multiple access (SDMA) extracts the multiplexing gain by transmitting multiuser packets simultaneously to maximize the system throughput. This paper considers a practical design called per user unitary and rate control (PU2RC) in order to achieve the multi-user diversity (MUDiv) for SDMA with the reasonable feedback burden. However, PU2RC/OFDMA needs to feedback the preferred precoding index and its CQIs per resource unit, chunk. Moreover, it has a defect in scheduling the streams using user grouping and is difficult to achieve MUDiv fully. In order to overcome these drawbacks, we employ transmitter controlled precoding and opportunistic feedback (TCP-OFB) in conjunction with frequency scheduling for single-user and multi-user allocation. Numerical results shows that the proposed scheme achieves comparable performance to conventional PU2RC/OFDMA with a far reduced feedback load in any user allocation and antenna correlation scenarios.\",\"PeriodicalId\":117027,\"journal\":{\"name\":\"2010 Wireless Telecommunications Symposium (WTS)\",\"volume\":\"16 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2010-04-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2010 Wireless Telecommunications Symposium (WTS)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/WTS.2010.5479649\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2010 Wireless Telecommunications Symposium (WTS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/WTS.2010.5479649","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A novel CQI feedback and user allocation scheme for PU2RC/OFDMA systems in correlated MIMO channels
On the multi-antenna broadcast channel, Space division multiple access (SDMA) extracts the multiplexing gain by transmitting multiuser packets simultaneously to maximize the system throughput. This paper considers a practical design called per user unitary and rate control (PU2RC) in order to achieve the multi-user diversity (MUDiv) for SDMA with the reasonable feedback burden. However, PU2RC/OFDMA needs to feedback the preferred precoding index and its CQIs per resource unit, chunk. Moreover, it has a defect in scheduling the streams using user grouping and is difficult to achieve MUDiv fully. In order to overcome these drawbacks, we employ transmitter controlled precoding and opportunistic feedback (TCP-OFB) in conjunction with frequency scheduling for single-user and multi-user allocation. Numerical results shows that the proposed scheme achieves comparable performance to conventional PU2RC/OFDMA with a far reduced feedback load in any user allocation and antenna correlation scenarios.