{"title":"软件无线电的定点表示映射算法","authors":"A. Wiesler, O. Muller, F. Jondral","doi":"10.1109/VETECF.2000.886858","DOIUrl":null,"url":null,"abstract":"The international mobile communication system IMT2000 will enable very flexible communication, which means variable data rates from 8 kbit/s speech up to 2 Mbit/s for data transmission. In November 1999 five modes of IMT2000 have been specified. In several modes turbo codes are proposed to enable bit error rates (BER) as low as 10/sup -6/ for high quality data services. Usually for this type of channel coding two MAP-algorithms, based on the maximum a posteriori criterion, are used for decoding. The MAP-algorithm utilizes soft input information and produces soft output information. The practical implementation of the MAP-algorithm, respectively its computational reduced version log-MAP and max-log-MAP, is investigated.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"7","resultStr":"{\"title\":\"MAP-algorithm with fixed-point representation for software radios\",\"authors\":\"A. Wiesler, O. Muller, F. Jondral\",\"doi\":\"10.1109/VETECF.2000.886858\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The international mobile communication system IMT2000 will enable very flexible communication, which means variable data rates from 8 kbit/s speech up to 2 Mbit/s for data transmission. In November 1999 five modes of IMT2000 have been specified. In several modes turbo codes are proposed to enable bit error rates (BER) as low as 10/sup -6/ for high quality data services. Usually for this type of channel coding two MAP-algorithms, based on the maximum a posteriori criterion, are used for decoding. The MAP-algorithm utilizes soft input information and produces soft output information. The practical implementation of the MAP-algorithm, respectively its computational reduced version log-MAP and max-log-MAP, is investigated.\",\"PeriodicalId\":186198,\"journal\":{\"name\":\"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)\",\"volume\":\"51 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2000-09-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"7\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/VETECF.2000.886858\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/VETECF.2000.886858","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
MAP-algorithm with fixed-point representation for software radios
The international mobile communication system IMT2000 will enable very flexible communication, which means variable data rates from 8 kbit/s speech up to 2 Mbit/s for data transmission. In November 1999 five modes of IMT2000 have been specified. In several modes turbo codes are proposed to enable bit error rates (BER) as low as 10/sup -6/ for high quality data services. Usually for this type of channel coding two MAP-algorithms, based on the maximum a posteriori criterion, are used for decoding. The MAP-algorithm utilizes soft input information and produces soft output information. The practical implementation of the MAP-algorithm, respectively its computational reduced version log-MAP and max-log-MAP, is investigated.
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