@article {Chaayra20201121, title = {New Accurate Approximation for the Sum of Generalized Gamma Distributions and its Applications}, journal = {Applied Mathematics and Information Sciences}, volume = {14}, number = {6}, year = {2020}, note = {cited By 1}, pages = {1121-1136}, abstract = {By considering the probability density function (PDF) of a generalized Gamma (GG) random variable (RV) evaluated in terms of a proper subset (Formula presented) class of Fox{\textquoteright}s H-function (FHF) and the moment-based approximation to estimate the H-function parameters, a closed-form tight approximate expression for the distribution of the sum of independent and not necessarily identical GG distributed RVs is presented as well as a sufficient condition for the convergence is verified. Such proposed approximate PDF is useful analytical tool for analyzing the performance of L-branch maximal-ratio combining receivers subject to such a fading model. This result can be also of paramount importance when dealing with an intelligent reflecting surface subject to GG fading channels. Furthermore, various closed-form approximate expressions, such as the cumulative distribution function (CDF), moment-generating function, outage probability (OP), average channel capacity, nth moment of the signal-to-noise ratio (SNR), amount of fading, and average symbol error probability (ASEP) for numerous coherent digital modulation schemes, are derived and examined in terms of FHF. To gain further insight into the system performance, asymptotic closed-form expressions for the ASEP and OP are derived and interesting observations are made. Particularly, our asymptotic analysis reveals that the achievable diversity order for high SNR values depends essentially on the branches{\textquoteright} number. The proposed mathematical analysis is assessed and corroborated by Monte-Carlo simulations using computer algebra systems, while the PDF and CDF are validated further with the aid of the Kullback-Leibler divergence criterion and Kolmogorov-Smirnov test, respectively {\textcopyright} 2020. NSP Natural Sciences Publishing Cor.}, doi = {10.18576/amis/140619}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85100193483\&doi=10.18576\%2famis\%2f140619\&partnerID=40\&md5=a2ca278ea1f812f0a524e23e100a588c}, author = {Chaayra, T. and Ben-Azza, H. and Bouanani, F.E.} } @article {Bouabdellah201840, title = {Network layer attacks and countermeasures in cognitive radio networks: A survey}, journal = {Journal of Information Security and Applications}, volume = {38}, year = {2018}, note = {cited By 0}, pages = {40-49}, abstract = {Spectrum scarcity is the principal motivation behind the development of cognitive radio. This technology introduces new functionalities at the physical, medium access control, and network layers of the TCP/IP protocol stack. These functionalities can be subject to new security threats. Most of the existing works in cognitive radio focused on the security issues in both the physical and medium access control layers. However, threats related to the network layer have not been studied despite its importance in establishing communication between different users in cognitive radio networks. In this paper, we classify and give an overview of attacks that target the network layer functionalities of cognitive radio networks. We discuss the existing detection techniques and countermeasures and highlight the main security challenges for such networks. {\textcopyright} 2017 Elsevier Ltd}, doi = {10.1016/j.jisa.2017.11.010}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85037523873\&doi=10.1016\%2fj.jisa.2017.11.010\&partnerID=40\&md5=e932d332e0495cc6658b35adcd2ea4a4}, author = {Bouabdellah, M. and Kaabouch, N. and El Bouanani, F. and Ben-Azza, H.} } @article {Bouabdellah201840, title = {Network layer attacks and countermeasures in cognitive radio networks: A survey}, journal = {Journal of Information Security and Applications}, volume = {38}, year = {2018}, pages = {40-49}, doi = {10.1016/j.jisa.2017.11.010}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85037523873\&doi=10.1016\%2fj.jisa.2017.11.010\&partnerID=40\&md5=e932d332e0495cc6658b35adcd2ea4a4}, author = {Bouabdellah, M. and Kaabouch, N. and El Bouanani, F. and Ben-Azza, H.} } @article {Bouanani2012, title = {New results for Shannon capacity over generalized multipath fading channels with MRC diversity}, journal = {Eurasip Journal on Wireless Communications and Networking}, volume = {2012}, number = {1}, year = {2012}, note = {cited By 7}, doi = {10.1186/1687-1499-2012-336}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84975257524\&doi=10.1186\%2f1687-1499-2012-336\&partnerID=40\&md5=e634e3e8c1f8c11dd0447fbfa16245ef}, author = {Bouanani, F.E. and Ben-Azza, H. and Belkasmi, M.} }