Bing-Hung Chiang, D. Lin, Hsueh-Jyh Li, Jia-li Wang
{"title":"高色散信道下改进的发射分集块编码OFDM系统","authors":"Bing-Hung Chiang, D. Lin, Hsueh-Jyh Li, Jia-li Wang","doi":"10.1109/VETECS.2003.1207812","DOIUrl":null,"url":null,"abstract":"In 2000, King proposed two g/sub 2/-based transmit diversity block coded OFDM (TDBC-OFDM) systems, i.e., space-time block coded (STBC-OFDM) and space-frequency block coded OFDM (SFBC-OFDM). However, he employed the least square (LS) detector, which was designed under the assumption that the channel is static over the duration of a space-time/frequency codeword. Thereupon, STBC-OFDM/SFBC-OFDM suffers from highly time-frequency selectivity of the channel. Recently, Antony recommended three novel detectors for space-time block coding (STBC) to combat the rapid channel variation. In our work, these detectors are applied to improve the original g/sub 2/-based TDBC-OFDM systems. Also, the performances of the improved g/sub 2/-based TDBC-OFDM systems are evaluated by computer simulation. Simulation results have revealed that significant performance improvement can be achieved even when the systems are operated in highly dispersive channels.","PeriodicalId":272763,"journal":{"name":"The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring.","volume":"37 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2003-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"Improved transmit diversity block coded OFDM systems for highly dispersive channels\",\"authors\":\"Bing-Hung Chiang, D. Lin, Hsueh-Jyh Li, Jia-li Wang\",\"doi\":\"10.1109/VETECS.2003.1207812\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In 2000, King proposed two g/sub 2/-based transmit diversity block coded OFDM (TDBC-OFDM) systems, i.e., space-time block coded (STBC-OFDM) and space-frequency block coded OFDM (SFBC-OFDM). However, he employed the least square (LS) detector, which was designed under the assumption that the channel is static over the duration of a space-time/frequency codeword. Thereupon, STBC-OFDM/SFBC-OFDM suffers from highly time-frequency selectivity of the channel. Recently, Antony recommended three novel detectors for space-time block coding (STBC) to combat the rapid channel variation. In our work, these detectors are applied to improve the original g/sub 2/-based TDBC-OFDM systems. Also, the performances of the improved g/sub 2/-based TDBC-OFDM systems are evaluated by computer simulation. Simulation results have revealed that significant performance improvement can be achieved even when the systems are operated in highly dispersive channels.\",\"PeriodicalId\":272763,\"journal\":{\"name\":\"The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring.\",\"volume\":\"37 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2003-04-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring.\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/VETECS.2003.1207812\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring.","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/VETECS.2003.1207812","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Improved transmit diversity block coded OFDM systems for highly dispersive channels
In 2000, King proposed two g/sub 2/-based transmit diversity block coded OFDM (TDBC-OFDM) systems, i.e., space-time block coded (STBC-OFDM) and space-frequency block coded OFDM (SFBC-OFDM). However, he employed the least square (LS) detector, which was designed under the assumption that the channel is static over the duration of a space-time/frequency codeword. Thereupon, STBC-OFDM/SFBC-OFDM suffers from highly time-frequency selectivity of the channel. Recently, Antony recommended three novel detectors for space-time block coding (STBC) to combat the rapid channel variation. In our work, these detectors are applied to improve the original g/sub 2/-based TDBC-OFDM systems. Also, the performances of the improved g/sub 2/-based TDBC-OFDM systems are evaluated by computer simulation. Simulation results have revealed that significant performance improvement can be achieved even when the systems are operated in highly dispersive channels.
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