{"title":"软件无线电OFDM系统中基于导频辅助和EM的信道估计新算法","authors":"Wu Ding-xue, Tian Jinwen","doi":"10.1109/ICCSN.2009.100","DOIUrl":null,"url":null,"abstract":"In order to increase the transmission efficiency of OFDM system, considering the special structure of Software Radio OFDM system, this paper proposes gradient acceleration method of EM algorithm(¿-EM) for OFDM systems channel estimation with Pilot assisted symbol modulation expectation. The simulation result shows that the new method can reduce the complexity and iteration times, and it has also still lower BER compared to traditional method.","PeriodicalId":177679,"journal":{"name":"2009 International Conference on Communication Software and Networks","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2009-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A New Algorithm for Channel Estimation Based on Pilot-Aided and EM in Software Radio OFDM System\",\"authors\":\"Wu Ding-xue, Tian Jinwen\",\"doi\":\"10.1109/ICCSN.2009.100\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In order to increase the transmission efficiency of OFDM system, considering the special structure of Software Radio OFDM system, this paper proposes gradient acceleration method of EM algorithm(¿-EM) for OFDM systems channel estimation with Pilot assisted symbol modulation expectation. The simulation result shows that the new method can reduce the complexity and iteration times, and it has also still lower BER compared to traditional method.\",\"PeriodicalId\":177679,\"journal\":{\"name\":\"2009 International Conference on Communication Software and Networks\",\"volume\":\"1 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2009-02-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2009 International Conference on Communication Software and Networks\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ICCSN.2009.100\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2009 International Conference on Communication Software and Networks","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICCSN.2009.100","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A New Algorithm for Channel Estimation Based on Pilot-Aided and EM in Software Radio OFDM System
In order to increase the transmission efficiency of OFDM system, considering the special structure of Software Radio OFDM system, this paper proposes gradient acceleration method of EM algorithm(¿-EM) for OFDM systems channel estimation with Pilot assisted symbol modulation expectation. The simulation result shows that the new method can reduce the complexity and iteration times, and it has also still lower BER compared to traditional method.
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