Prefiltered Turbo Equalization with SINR Mismatch

Document type: Conference Papers
Peer reviewed: Yes
Author(s): Asri Shaheem, Hans-Jürgen Zepernick, Manora Caldera
Title: Prefiltered Turbo Equalization with SINR Mismatch
Conference name: IEEE International Symposium on Wireless Communication Systems
Year: 2007
Publisher: IEEE
City: Trondheim
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Signal Processing (Sektionen för teknik – avd. för signalbehandling)
School of Engineering S- 372 25 Ronneby
+46 455 38 50 00
Authors e-mail:,,
Language: English
Abstract: In this paper, we consider the use of a channel shortening prefilter in conjunction with a turbo equalizer, in order to allow its use with arbitrarily long channel impulse responses. We show that the residual intersymbol interference (ISI), caused by imperfect channel shortening, results in considerable performance
loss. However, by intentionally introducing a particular signal-to-interference plus noise ratio (SINR) mismatch, some of the penalty incurred can be overcome. We also show that the coloring of the noise through the prefilter results in a significant performance loss, which is insensitive to SINR mismatch and cannot be improved by choosing an appropriate SINR mismatch.
Subject: Telecommunications\Coding Theory