{"title":"高速分组OFDM通信系统的信道估计","authors":"Wookwon Lee, Jie Zhu","doi":"10.1109/WPMC.2002.1088388","DOIUrl":null,"url":null,"abstract":"In orthogonal frequency division multiplexing (OFDM) based packet communication systems, it is desired to minimize the number of pilot symbols for better spectrum utilization. Also, accurate channel estimation is required for coherent demodulation of OFDM signals, particularly when modulated by multilevel modulation schemes. In this paper, we present a pilot-assisted decision-directed channel estimation technique suitable for packet transmission with relatively short OFDM symbols. Simulation has shown that our approach can save about 20% of the number of pilot symbols required in the conventional least square estimator for a situation considered in this paper.","PeriodicalId":420635,"journal":{"name":"The 5th International Symposium on Wireless Personal Multimedia Communications","volume":"44 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"8","resultStr":"{\"title\":\"Channel estimation for high-speed packet-based OFDM communication systems\",\"authors\":\"Wookwon Lee, Jie Zhu\",\"doi\":\"10.1109/WPMC.2002.1088388\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In orthogonal frequency division multiplexing (OFDM) based packet communication systems, it is desired to minimize the number of pilot symbols for better spectrum utilization. Also, accurate channel estimation is required for coherent demodulation of OFDM signals, particularly when modulated by multilevel modulation schemes. In this paper, we present a pilot-assisted decision-directed channel estimation technique suitable for packet transmission with relatively short OFDM symbols. Simulation has shown that our approach can save about 20% of the number of pilot symbols required in the conventional least square estimator for a situation considered in this paper.\",\"PeriodicalId\":420635,\"journal\":{\"name\":\"The 5th International Symposium on Wireless Personal Multimedia Communications\",\"volume\":\"44 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2002-12-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"8\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"The 5th International Symposium on Wireless Personal Multimedia Communications\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/WPMC.2002.1088388\",\"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 5th International Symposium on Wireless Personal Multimedia Communications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/WPMC.2002.1088388","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Channel estimation for high-speed packet-based OFDM communication systems
In orthogonal frequency division multiplexing (OFDM) based packet communication systems, it is desired to minimize the number of pilot symbols for better spectrum utilization. Also, accurate channel estimation is required for coherent demodulation of OFDM signals, particularly when modulated by multilevel modulation schemes. In this paper, we present a pilot-assisted decision-directed channel estimation technique suitable for packet transmission with relatively short OFDM symbols. Simulation has shown that our approach can save about 20% of the number of pilot symbols required in the conventional least square estimator for a situation considered in this paper.
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