{"title":"Finite length equalization for FFT-based multicarrier systems-an error-whitening viewpoint","authors":"M. Webster, R. Roberts","doi":"10.1109/ACSSC.1997.680439","DOIUrl":null,"url":null,"abstract":"Discrete multitone modulation (DMT) is a useful waveform in the communication systems engineer's toolbox. For certain applications, DMT produces designs which are easier to implement than a single-carrier-based design, while attaining higher performance. An important component in the asymmetric digital subscriber loop (ADSL) the DMT system is the finite-length equalizer which truncates the channel impulse response, greatly reducing the requisite FFT size. This paper argues that the preferred channel-truncating equalizer is one which whitens the composite error sequence. A white error sequence tends to achieve information-transmission optimality.","PeriodicalId":240431,"journal":{"name":"Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1997-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ACSSC.1997.680439","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
Discrete multitone modulation (DMT) is a useful waveform in the communication systems engineer's toolbox. For certain applications, DMT produces designs which are easier to implement than a single-carrier-based design, while attaining higher performance. An important component in the asymmetric digital subscriber loop (ADSL) the DMT system is the finite-length equalizer which truncates the channel impulse response, greatly reducing the requisite FFT size. This paper argues that the preferred channel-truncating equalizer is one which whitens the composite error sequence. A white error sequence tends to achieve information-transmission optimality.
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