Performance of Modulo-Type Viterbi Decoder for Digital Subscriber Loops

Kyu-Min KANG  Gi-Hong IM  

Publication
IEICE TRANSACTIONS on Communications   Vol.E84-B   No.2   pp.155-162
Publication Date: 2001/02/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Transmission Systems and Transmission Equipment
Keyword: 
modulo-type VD (MVD),  conventional VD (CVD),  TH precoder,  xDSL,  

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Summary: 
In this paper, we discuss the performance and computational complexity of modulo-type Viterbi decoder (MVD) for high-speed digital transmission applications. It is shown that the MVD, which is a combination of modulo operation and Viterbi decoder at the receiver, has the same performance as a conventional Viterbi decoder (CVD) with extended constellations. We also show by complexity analysis that the MVD in conjunction with the Tomlinson-Harashima (TH) precoder at the transmitter reduces the system complexity significantly as compared to the CVD. The performance of the digital subscriber line (xDSL) system employing the MVD is investigated in the presence of near-end crosstalk (NEXT) and impulsive noise.