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Digital modulation recognition in noisy environment using a learning machine
Joint Authors
Shakir, M. A.
Haji, S. H.
al-Sulaifani, Bayiz Khurshid
Source
Engineering and Technology Journal
Issue
Vol. 35, Issue 6A (30 Jun. 2017), pp.624-633, 10 p.
Publisher
Publication Date
2017-06-30
Country of Publication
Iraq
No. of Pages
10
Main Subjects
Engineering & Technology Sciences (Multidisciplinary)
Abstract EN
This paper proposes a method to identify the type of digitally modulated signals.
The modulation classification process is performed using Support Vector Machines (SVMs) with one versus all approach.
A multi-class recognition system is required.
Consequently, the Radial Basis Function (RBF) kernel is proposed.
The system is intended to classify three types of signals: ASK FSK, and PSK.
Five features are extracted from amplitude, frequency and phase of each modulated signal to be the input of the SVM classifier.
The system is simulated using MATLAB software.
The system is tested against Additive White Gaussian Noise (AWGN).
The classification rate for all modulated signals is measured at different values of SNR.
The overall performance of this classifier is around 83% at -5 dB.
Furthermore, to enhance the performance of the classifier further, the data inputs to the SVMs for each modulated signal is reduced by eliminating some key features.
These are the standard deviation of the direct value of the centered non-linear component of the instantaneous phase and the standard deviation of the absolute value of the normalized-centered of the instantaneous amplitude.
The overall performance after input data reduction is greater than 84% at -5 dB.
American Psychological Association (APA)
Shakir, M. A.& Haji, S. H.& al-Sulaifani, Bayiz Khurshid. 2017. Digital modulation recognition in noisy environment using a learning machine. Engineering and Technology Journal،Vol. 35, no. 6A, pp.624-633.
https://search.emarefa.net/detail/BIM-795443
Modern Language Association (MLA)
Shakir, M. A.…[et al.]. Digital modulation recognition in noisy environment using a learning machine. Engineering and Technology Journal Vol. 35, no. 6A (2017), pp.624-633.
https://search.emarefa.net/detail/BIM-795443
American Medical Association (AMA)
Shakir, M. A.& Haji, S. H.& al-Sulaifani, Bayiz Khurshid. Digital modulation recognition in noisy environment using a learning machine. Engineering and Technology Journal. 2017. Vol. 35, no. 6A, pp.624-633.
https://search.emarefa.net/detail/BIM-795443
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 633
Record ID
BIM-795443