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A novel reduced-complexity MAP equalizer using soft-statistics for decision-feedback ISI cancellation

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4 Author(s)
Baccarelli, E. ; INFOCOM Dept., Rome Univ., Italy ; Fasono, A. ; Galli, S. ; Zucchi, A.

A novel version of the reduced-state Bayesian maximum a posteriori probability/decision-feedback (MAP/DF) equalizer for ISI channels with long impulse responses is presented. The main feature of the proposed equalizer is that the soft-statistics generated by the MAP receiver are employed to recursively compute a suitable index of the actual reliability of the (soft) decisions feeding the DF filter. Therefore, in the presented equalizer the usual (over-optimistic) assumption of error-free decisions at the input of the feedback filter is relaxed and numerical results supporting the actual effectiveness of the proposed MAP/DF equalizer are provided for the so-called high-bit-rate digital subscriber line (HDSL) test-loop # 4.

Published in:
Global Telecommunications Conference, 1999. GLOBECOM '99  (Volume:5 )

Date of Conference: 1999

Page(s):
2296 - 2300 vol.5
Print ISBN:
0-7803-5796-5
INSPEC Accession Number:
6644084
Digital Object Identifier :
10.1109/GLOCOM.1999.831712
Product Type:
Conference Publications

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