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《Telecommunications for Electric Power System》 2006-06
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Study about channel estimation for OFDM system in low-voltag power line communication

YANG Hai-bao~(1),XU Lei~(2),YINI Ji-chun~3,HONG Zhe~(4)(1.Zhangjiakou Communication College,Zhangjiakou 075000,China;2.Baoding Elctric Power Bureau,Baoding 071000,China;3.Hebei Resource Engineering Design Co.,Ltd.,Shijiazhuang 050031,China;4.North China Electric Power University,Baoding 071003,China)  
Orthogonal Frequency Division Multiplexing technique is the best choice for low-voltage power line broadband communication because of its many advantages.Channel estimation is one of the key problems in OFDM system.Establishing a reasonable channel model is the first step in channel estimation research.In this paper,several communication channel models of low-voltage power line are discussed firstly.Then OFDM communication channel estimation algorithms,which are used now,are analyzed.At last,the statistic AR model of low-voltage power line which is able to reflect the statistical time-varying rule and LMS adaptive channel estimation algorithm are chosen.The simulation is made for OFDM low-power line communication system.The simulation results indicate that LMS algorithm is able to tracking the varying of low-power line and has good estimation performances.
【CateGory Index】: TM73
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