DocumentCode :
757083
Title :
Turbo equalization: principles and new results
Author :
Tüchler, Michael ; Koetter, Ralf ; Singer, Andrew C.
Author_Institution :
Inst. for Commun. Eng., Tech. Univ. of Munich, Germany
Volume :
50
Issue :
5
fYear :
2002
fDate :
5/1/2002 12:00:00 AM
Firstpage :
754
Lastpage :
767
Abstract :
We study the turbo equalization approach to coded data transmission over channels with intersymbol interference. In the original system invented by Douillard et al. (1995), the data are protected by a convolutional code and the receiver consists of two trellis-based detectors, one for the channel (the equalizer) and one for the code (the decoder). It has been shown that iterating equalization and decoding tasks can yield tremendous improvements in bit error rate. We introduce new approaches to combining equalization based on linear filtering, with decoding.. Through simulation and analytical results, we show that the performance of the new approaches is similar to the trellis-based receiver, while providing large savings in computational complexity. Moreover, this paper provides an overview of the design alternatives for turbo equalization with given system parameters, such as the channel response or the signal-to-noise ratio
Keywords :
convolutional codes; equalisers; error statistics; filtering theory; intersymbol interference; iterative decoding; signal detection; trellis codes; turbo codes; BER; MMSE equalization; SNR; bit error rate; channel r6ponse; coded data transmission; computational complexity; convolutional code; intersymbol interference; iterative decoding; iterative equalization; linear filtering; signal-to-noise ratio; simulation results; trellis-based detectors; trellis-based receiver; turbo equalization; Bit error rate; Computational modeling; Convolutional codes; Data communication; Detectors; Equalizers; Intersymbol interference; Iterative decoding; Maximum likelihood detection; Protection;
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/TCOMM.2002.1006557
Filename :
1006557
Link To Document :
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