Proceedings ArticleDOI
Robust recognition of linear and nonlinear digital modulations of RRC pulse trains
Mohammad Bari,Milos Doroslovacki +1 more
- pp 1-6
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TLDR
Simple and robust features to distinguish continuous-phase frequency shift keying from quadrature amplitude and phase shift modulations are proposed and performance is compared to the wavelet based feature that uses support vector machines for classification.Abstract:
In this paper we propose simple and robust features to distinguish continuous-phase frequency shift keying from quadrature amplitude and phase shift keying modulations. Robustness is tested in the presence of SNR estimation offset, block and correlated fast fading, lack of symbol and sampling synchronization, and carrier offset. The features are based on sample mean and sample variance of the imaginary part of the product of two consecutive complex signal values. Root raised cosine pulses are used to generate the linearly modulated signals. Root raised cosine as well as rectangular shaped instantaneous frequency pulses are used in designing the continuous-phase frequency shift keying signals. Support vector machines are employed to distinguish the signals. One benefit of using support vector machines is that it requires very few realizations for training. Moreover, no a priori information is required about carrier amplitude, carrier phase, carrier offset, symbol rate, pulse shape and initial symbol phase. Performance of the proposed feature is compared to the wavelet based feature that uses support vector machines for classification.read more
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Recognizing FM, BPSK and 16-QAM using supervised and unsupervised learning techniques
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Joint Scheduling and Power Control for Delay Guarantees in Heterogeneous Cognitive Radios
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Identification of L-ary CPFSK in a fading channel using approximate entropy
Mohammad Bari,Milos Doroslovacki +1 more
TL;DR: This paper studies approximate entropy as the feature to distinguish within the class of L-ary continuous-time FSK in the presence of correlated fast fading and additive white Gaussian noise.
Proceedings ArticleDOI
Order recognition of continuous-phase FSK
Mohammad Bari,Milos Doroslovacki +1 more
TL;DR: A set of distinguishing features based on approximate entropy identifies the order of continuous-time frequency shift keyings in the joint presence of carrier offset, asynchronous sampling and symbol intervals, correlated fast fading and additive white Gaussian noise.
References
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Journal ArticleDOI
Modulation identification of digital signals by the wavelet transform
TL;DR: In this article, the use of the wavelet transform for modulation identification of digital signals is described, which can effectively extract the transient characteristics in a digital communication signal, yielding distinct patterns for simple identification.
Journal ArticleDOI
Modulation Recognition in Continuous Phase Modulation Using Approximate Entropy
S. U. Pawar,John F. Doherty +1 more
TL;DR: In this paper, a nonlinear method to analyze a time series is proposed as a unique characteristic of a modulation scheme and projected as a robust feature to identify signal parameters such as number of symbol levels, pulse lengths, and modulation indices of a continuous phase modulated (CPM) signal.
Proceedings ArticleDOI
Digital modulation recognition using support vector machine classifier
H. Mustafa,Milos Doroslovacki +1 more
TL;DR: A new method of classification based on support vector machine (SVM) that uses the four proposed features to classify amplitude shift keying with two levels and four levels and the performance of SVM classifier is studied.
Proceedings ArticleDOI
Performance of the instantaneous frequency based classifier distinguishing BFSK from QAM and PSK modulations for asynchronous sampling and slow and fast fading
TL;DR: A feature to distinguish frequency from amplitude-phase digital modulations is proposed and the proposed classifier is compared to the maximum likelihood classifier and the wavelet based classifier using support vector machine.
Journal ArticleDOI
Simple Features for Separating CPFSK from QAM and PSK Modulations
TL;DR: In this letter, simple and robust features to distinguish continuous-phase frequency shift keying from quadrature amplitude modulation and phaseshift keying modulations are proposed and compared to the wavelet based classifier, equipped by support vector machines.
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