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Channel modeling for spread spectrum via evolutionary transform
2004 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2004Given the importance of direct sequence spread spectrum (DSSS) communications, the modeling of its transmission channel is of great interest. Due to multipath and Doppler effects in the transmission channel, the transmitted signal is spread in both time and frequency.
Luis F. Chaparro, Abdullah Ali Alshehri
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An evolutionary game theoretic approach for cooperative spectrum sensing
2016 IEEE Wireless Communications and Networking Conference, 2016Many spectrum sensing techniques have been proposed to allow a secondary user (SU) to utilize a primary user's (PU) spectrum through opportunistic access. However, few of them have considered the tradeoff between accuracy and energy consumption by taking into account the selfishness of the (SUs) in a distributed network.
Ahmed M. Salama +2 more
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The estimation of evolutionary spectrum by square-root filtering algorithm
ICASSP '87. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005This paper deals with the spectrum estimation of a kind of nonstationary stochastic process, the oscillating process. For time-varying model parameters of evolutionary spectrum, which has been supposed to follow sample-wise random walk model, we adopt recursive algorithm to estimate them.
Yong Bin Chen, Yu Qing Gao
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Evolutionary Search for Energy-Efficient Distributed Cooperative Spectrum Sensing
2020 International Conference on Computing, Networking and Communications (ICNC), 2020This paper concerns the energy efficiencyoptimization for distributed cooperative spectrum sensing. In the considered distributed spectrum sensing system, each sensor measures the local test statistic for the target spectrum bands and these measurements will be combined together through a weighted consensus protocol.
He Jiang 0004 +3 more
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[Evolutionary psychiatry applied to autism spectrum disorder].
Tijdschrift voor psychiatrie, 2023Considering an evolutionary perspective, psychiatric conditions present us with a paradox. How can the high prevalence of those conditions be explained, given the importance of genetic factors in many of them? Evolutionary principles predict that traits with an adverse effect on reproduction undergo negative selection.To try to formulate an answer to ...
K, Hendrickx +2 more
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The Evolutionary Etiologies of Autism Spectrum and Psychotic Affective Spectrum Disorders
2016Risks of human psychiatric conditions have evolved, and their symptoms represent perturbations to adaptive cognitive and affective systems. Evolutionary considerations are useful in this context because they direct us to the identification of specific human adaptations that become dysregulated in disease, though either underdevelopment or ...
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Evolutionary algorithm for dynamic spectrum allocation in cognitive radio system
2016 4th IEEE International Colloquium on Information Science and Technology (CiSt), 2016Today, Cognitive radio (CR) is found to be the key technology to exploit the unused available spectrum resources; it can sense and use spectrum in an opportunistic manner without creating any harm to cognitive users. In this paper, we develop a cognitive radio access strategy based on the implementation of a dynamic genetic algorithm for CR.
Jamal Elhachimi, Zouhair Guennoun
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Strategy Analysis of an Evolutionary Spectrum Sensing Game
2014Evolutionary game has been shown to greatly improve the spectrum sensing performance in cognitive radio. However, as selfish users are shortsighted for the long-term profits, they are not willing to collaborate to sense. In this paper, we propose an evolutionary spectrum sensing game to improve the long-term spectrum utilization.
Dongsheng Ding +3 more
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Spatial evolutionary spectrum for DOA estimation and blind signal separation
IEEE Transactions on Signal Processing, 2000We combine the concepts of evolutionary spectrum and array processing. We present a cross-power stationary periodogram for both direction-of-arrival (DOA) estimation and blind separation of nonstationary signals. We model the nonstationary signals received by each array sensor as a sum of complex sinusoids with time-varying amplitudes. These magnitudes
A. Salim Kayhan, Moeness G. Amin
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The Unique Evolutionary Signature of Genes Associated with Autism Spectrum Disorder
Behavior Genetics, 2016Autism spectrum disorder (ASD) is a common heritable neurodevelopmental disorder, which is characterized by communication and social deficits that reduce the reproductive fitness of individuals with the disorder. Here, we studied the genomic characteristics of 651 ASD genes in a whole-exome sequencing dataset, to search for traces of the evolutionary ...
Erez Tsur, Michael Friger, Idan Menashe
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