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Two-Dimensional Iterative Processing for DAB Receivers Based on Trellis-Decomposition
Joint Authors
van Houtum, Wim J.
Willems, Frans M. J.
Source
Journal of Electrical and Computer Engineering
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-02-08
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Engineering Sciences and Information Technology
Information Technology and Computer Science
Abstract EN
We investigate iterative trellis decoding techniques for DAB, with the objective of gaining from processing 2D-blocks in an OFDM scheme, that is, blocks based on the time and frequency dimension, and from trellis decomposition.
Trellis-decomposition methods allow us to estimate the unknown channel phase since this phase relates to the sub-trellises.
We will determine a-posteriori sub-trellis probabilities, and use these probabilities for weighting the a-posteriori symbol probabilities resulting from all the sub-trellises.
Alternatively we can determine a dominant sub-trellis and use the a-posteriori symbol probabilities corresponding to this dominant sub-trellis.
This dominant sub-trellis approach results in a significant complexity reduction.
We will investigate both iterative and non-iterative methods.
The advantage of non-iterative methods is that their forwardbackward procedures are extremely simple; however, also their gain of 0.7 dB, relative to two-symbol differential detection (2SDD) at a BER of 10-4, is modest.
Iterative procedures lead to the significantly larger gain of 3.7 dB at a BER of 10-4 for five iterations, where a part of this gain comes from 2D processing.
Simulations of our iterative approach applied to the TU-6 (COST207) channel show that we get an improvement of 2.4 dB at a Doppler frequency of 10 Hz.
American Psychological Association (APA)
van Houtum, Wim J.& Willems, Frans M. J.. 2012. Two-Dimensional Iterative Processing for DAB Receivers Based on Trellis-Decomposition. Journal of Electrical and Computer Engineering،Vol. 2012, no. 2012, pp.1-15.
https://search.emarefa.net/detail/BIM-468711
Modern Language Association (MLA)
van Houtum, Wim J.& Willems, Frans M. J.. Two-Dimensional Iterative Processing for DAB Receivers Based on Trellis-Decomposition. Journal of Electrical and Computer Engineering No. 2012 (2012), pp.1-15.
https://search.emarefa.net/detail/BIM-468711
American Medical Association (AMA)
van Houtum, Wim J.& Willems, Frans M. J.. Two-Dimensional Iterative Processing for DAB Receivers Based on Trellis-Decomposition. Journal of Electrical and Computer Engineering. 2012. Vol. 2012, no. 2012, pp.1-15.
https://search.emarefa.net/detail/BIM-468711
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-468711