Low-Complexity Estimation Method of Cyclic-Prefix Length for DMT VDSL System

Hui-Chul WON  Gi-Hong IM  

Publication
IEICE TRANSACTIONS on Communications   Vol.E88-B   No.2   pp.758-761
Publication Date: 2005/02/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.2.758
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Transmission Systems and Transmission Equipment for Communications
Keyword: 
cyclic prefix (CP),  discrete multitone (DMT),  very high-speed digital subscriber line (VDSL),  intersymbol interference (ISI),  

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Summary: 
In this letter, we propose a low-complexity estimation method of cyclic-prefix (CP) length for a discrete multitone (DMT) very high-speed digital subscriber line (VDSL) system. Using the sign bits of the received DMT VDSL signals, the proposed method provides a good estimate of CP length, which is suitable for various channel characteristics. This simple estimation method is consistent with the initialization procedure of T1E1.4 multi-carrier modulation (MCM)-based VDSL Standard. Finally, simulation results with VDSL test loops are presented.