Digital Timing Error Correction in Discrete Multitone Systems

Jaekwon KIM
Joonhyuk KANG
Yongsoo CHO

Publication
IEICE TRANSACTIONS on Communications   Vol.E88-B    No.5    pp.2173-2176
Publication Date: 2005/05/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.5.2173
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Transmission Systems and Transmission Equipment for Communications
Keyword: 
non-synchronized sampling,  discrete multitone,  

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Summary: 
When a fixed free-running crystal is used for sampling time generation at a DMT receiver, Inter-Symbol Interference (ISI) and Inter-Carrier Interference (ICI) are introduced by sampling time error. The ICI becomes more serious as the DMT symbol length increases. In this letter, the effects of sampling clock offset are investigated in the time domain using a new notion of Inter-sample Interference (IsI) instead of ISI and ICI. Based on the IsI analysis, we propose a new frequency domain timing error correction scheme.