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Nonlinear Demodulation and Channel Coding in EBPSK Scheme
Joint Authors
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-11-20
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Natural & Life Sciences (Multidisciplinary)
Medicine
Information Technology and Computer Science
Abstract EN
The extended binary phase shift keying (EBPSK) is an efficient modulation technique, and a special impacting filter (SIF) is used in its demodulator to improve the bit error rate (BER) performance.
However, the conventional threshold decision cannot achieve the optimum performance, and the SIF brings more difficulty in obtaining the posterior probability for LDPC decoding.
In this paper, we concentrate not only on reducing the BER of demodulation, but also on providing accurate posterior probability estimates (PPEs).
A new approach for the nonlinear demodulation based on the support vector machine (SVM) classifier is introduced.
The SVM method which selects only a few sampling points from the filter output was used for getting PPEs.
The simulation results show that the accurate posterior probability can be obtained with this method and the BER performance can be improved significantly by applying LDPC codes.
Moreover, we analyzed the effect of getting the posterior probability with different methods and different sampling rates.
We show that there are more advantages of the SVM method under bad condition and it is less sensitive to the sampling rate than other methods.
Thus, SVM is an effective method for EBPSK demodulation and getting posterior probability for LDPC decoding.
American Psychological Association (APA)
Chen, Xianqing& Wu, Lenan. 2012. Nonlinear Demodulation and Channel Coding in EBPSK Scheme. The Scientific World Journal،Vol. 2012, no. 2012, pp.1-7.
https://search.emarefa.net/detail/BIM-452322
Modern Language Association (MLA)
Chen, Xianqing& Wu, Lenan. Nonlinear Demodulation and Channel Coding in EBPSK Scheme. The Scientific World Journal No. 2012 (2012), pp.1-7.
https://search.emarefa.net/detail/BIM-452322
American Medical Association (AMA)
Chen, Xianqing& Wu, Lenan. Nonlinear Demodulation and Channel Coding in EBPSK Scheme. The Scientific World Journal. 2012. Vol. 2012, no. 2012, pp.1-7.
https://search.emarefa.net/detail/BIM-452322
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-452322