@article{MTMT:34791332,
	title = {GTIACO: energy efficient clustering algorithm based on game theory and improved ant colony optimization},
	url = {https://m2.mtmt.hu/api/publication/34791332},
	author = {Wan, Hang and Qiu, Zhizhuo and Quan, Rui and David, Michael and Derigent, William},
	doi = {10.1007/s11235-024-01132-7},
	journal-iso = {TELECOMMUN SYST},
	journal = {TELECOMMUNICATION SYSTEMS},
	volume = {&},
	unique-id = {34791332},
	issn = {1018-4864},
	year = {2024},
	eissn = {1572-9451},
	pages = {&}
}

@article{MTMT:34666460,
	title = {Mobile station localization based on hybrid SADOA/AOA in cellular networks},
	url = {https://m2.mtmt.hu/api/publication/34666460},
	author = {Abdel-Razeq, Sharief},
	doi = {10.1007/s11235-023-01097-z},
	journal-iso = {TELECOMMUN SYST},
	journal = {TELECOMMUNICATION SYSTEMS},
	unique-id = {34666460},
	issn = {1018-4864},
	keywords = {Cellular networks; LLS; MSL; AOA; Location error; SADOA},
	year = {2024},
	eissn = {1572-9451}
}

@article{MTMT:34620374,
	title = {Pilot contamination mitigation by pilot assignment and adaptive linear precoding for massive MIMO multi-cell systems},
	url = {https://m2.mtmt.hu/api/publication/34620374},
	author = {Misso, Angelina and Kissaka, Mussa},
	doi = {10.1007/s11235-023-01093-3},
	journal-iso = {TELECOMMUN SYST},
	journal = {TELECOMMUNICATION SYSTEMS},
	unique-id = {34620374},
	issn = {1018-4864},
	abstract = {According to research, the performance of the massive MIMO system is constrained by pilot contamination. Recent developments in massive MIMO provide a variety of methods for the reduction of pilot contamination with diverse performances. There is a trade-off between the complexity of the system, the time-frequency resources needed to estimate the channel, and the effectiveness of pilot contamination mitigation. Limited research exists on the analysis of the combined effect of the three parameters, despite the impact of the parameters on the performance of massive MIMO multi-cell networks. Therefore, in this research, an algorithm consisting of a combined adaptive linear precoding and pilot assignment methods was designed for the reduction of pilot contamination in the massive MIMO multi-cellular network. The Maximum ratio Transmission (MRT) and Zero Forcing (ZF) precoding schemes were incorporated in the algorithm to diminish interfering signals from other cells while amplifying the intended signal, to improve the BER at low computational complexity. Pilot assignment methods of frequency reuse and the Zadoff-Chu sequence facilitated the optimal allocation of resources and reduced interference to improve spectral efficiency. The pilot assignment method ensures an optimal number of pilots are assigned to guarantee the efficient use of resources while precoding schemes eliminate interference. The effectiveness of the proposed algorithm was evaluated based on the ability to reduce BER, increase spectral efficiency, and reduce computational complexity. The results show improved performance of the proposed algorithm, compared to the conventional MRT and ZF precoders. Accordingly, this study contributes to the investigation of the impact of integrating adaptive linear precoding and pilot assignment methods for pilot contamination mitigation in massive MIMO systems.},
	keywords = {pilot contamination; Linear precoding; Massive MIMO; pilot assignment},
	year = {2024},
	eissn = {1572-9451},
	orcid-numbers = {Misso, Angelina/0000-0003-4638-2852}
}

@article{MTMT:34614144,
	title = {Performance analysis and design of semi-blind beamforming for downlink MIMO-NOMA heterogeneous network},
	url = {https://m2.mtmt.hu/api/publication/34614144},
	author = {Rehman, Sadiq Ur and Ahmad, Jawwad and Manzar, Anwaar and Moinuddin, Muhammad},
	doi = {10.1007/s11235-023-01098-y},
	journal-iso = {TELECOMMUN SYST},
	journal = {TELECOMMUNICATION SYSTEMS},
	unique-id = {34614144},
	issn = {1018-4864},
	abstract = {Non-orthogonal multiple access (NOMA) communication is a potential strategy for overcoming the limits of classic orthogonal multiple access schemes, and it can improve possible rates. In contrast, MIMO-NOMA improves them even more due to multiple antenna diversity advantages. On the other hand, future wireless communication will rely on heterogeneous networks (HetNets), which allow many wireless access networks to coexist hierarchically. However, channel reciprocity is invalid because of the shorter channel coherence time in 5G and 6G communications. As a result, channel estimation through an uplink (UL) pilot no longer holds for downlink (DL) transmission. To address this issue, a statistical beamforming approach is proposed that does not consider channel reciprocity for channel estimation. Consequently, the proposed method saves the pilot transmission overhead required for channel estimation resulting in increased spectral efficiency. To achieve this, we propose to employ the characterization of the ratio of the indefinite quadratic form (IQF) to obtain a closed-form formula for the outage probability in MIMO-NOMA HetNets. The analytical expression obtained is then utilized to design optimal beamforming weights using the genetic algorithm (GA) that solves a constrained multi-objective optimization task. In summary, advantages of our proposed method are (1) it provides spectral efficient method of beamforming, (2) it derives an exact characterization of outage probability in MIMO-NOMA HetNets in closed form, and (3) it develops a GA based optimization solution that solves a constrained multi-objective optimization task simulation results presented validate the theoretical analysis and show supremacy of the proposed method over classical statistical method.},
	keywords = {GENETIC ALGORITHM; Beamforming; outage probability; Heterogeneous network; MIMO NOMA},
	year = {2024},
	eissn = {1572-9451}
}

@article{MTMT:34659564,
	title = {Quantitative measurement of link failure reaction time for devices with P4-programmable data planes},
	url = {https://m2.mtmt.hu/api/publication/34659564},
	author = {Franco, David and Higuero, Marivi and Zaballa, Eder Ollora and Unzilla, Juanjo and Jacob, Eduardo},
	doi = {10.1007/s11235-023-01084-4},
	journal-iso = {TELECOMMUN SYST},
	journal = {TELECOMMUNICATION SYSTEMS},
	volume = {85},
	unique-id = {34659564},
	issn = {1018-4864},
	keywords = {Failure recovery; P4; Software-defined networking; programmable data plane; Failure reaction time},
	year = {2024},
	eissn = {1572-9451},
	pages = {277-288},
	orcid-numbers = {Franco, David/0000-0002-3763-9815; Jacob, Eduardo/0000-0001-7093-0586}
}

@article{MTMT:34633110,
	title = {Power allocation for enhancing the physical layer secrecy performance of artificial noise-aided full-duplex cooperative NOMA system},
	url = {https://m2.mtmt.hu/api/publication/34633110},
	author = {Nimi, T. and Babu, A. V.},
	doi = {10.1007/s11235-023-01067-5},
	journal-iso = {TELECOMMUN SYST},
	journal = {TELECOMMUNICATION SYSTEMS},
	unique-id = {34633110},
	issn = {1018-4864},
	keywords = {Performance analysis; power allocation; physical layer security; Artificial noise; full-duplex relaying; non-orthogonal multiple access},
	year = {2023},
	eissn = {1572-9451}
}

@article{MTMT:34614119,
	title = {On the leakage-rate performance of untrusted relay-aided NOMA under co-channel interference},
	url = {https://m2.mtmt.hu/api/publication/34614119},
	author = {Ozduran, Volkan and Nomikos, Nikolaos},
	doi = {10.1007/s11235-023-01071-9},
	journal-iso = {TELECOMMUN SYST},
	journal = {TELECOMMUNICATION SYSTEMS},
	unique-id = {34614119},
	issn = {1018-4864},
	abstract = {This study seeks an answer for the impact of the co-channel interference on the leakage rate of illegitimate relay-assisted powerdomain non-orthogonal multiple access (NOMA) networks. The power-domain NOMA-based uni-/bi-directional information exchange through an illegitimate half-/full-duplex relay is adopted in the system model. Moreover, a limited number of cochannel interferers and friendly jammers are affected by the illegitimate relay in the network. Extensive computer simulations, analytical, and asymptotic results reveal that as the illegitimate relay is affected by a limited number of friendly jammers and co-channel interferers, its achievable rate cannot be enhanced and saturates at high signal-to-noise ratio. Results also show that the co-channel interference causes system coding gain losses on the users' outage performance. In addition, the illegitimate relay remains active between - 10 and 25dB for uni-/bi-directional information exchange. After 25 dB, the illegitimate relay saturates and experiences outages. Additionally, the order of decoding also impacts the illegitimate relay's performance.},
	keywords = {Leakage rate; non-orthogonal multiple access; untrusted relay},
	year = {2023},
	eissn = {1572-9451},
	orcid-numbers = {Nomikos, Nikolaos/0000-0002-9210-9796}
}

@article{MTMT:34369314,
	title = {Real-time linear antenna array synthesis of broadside pattern using improved dwarf mongoose optimization algorithm},
	url = {https://m2.mtmt.hu/api/publication/34369314},
	author = {Singh, Harbinder and Singh, Simrandeep and Gupta, Amit},
	doi = {10.1007/s11235-023-01063-9},
	journal-iso = {TELECOMMUN SYST},
	journal = {TELECOMMUNICATION SYSTEMS},
	unique-id = {34369314},
	issn = {1018-4864},
	abstract = {This research introduces a novel framework that combines the dwarf mongoose optimization (DMO) algorithm with the sine-cosine algorithm (SCA) for the design of real-time linear antenna array (LAA) applications. The DMO algorithm, inspired by swarm behavior found in nature, comprises distinct groups-the alpha group, scouts, and babysitters-each utilizing unique food-capturing strategies. Linear antenna arrays are widely used in next-generation communication applications such as 5G, IoT and beamforming. However, it is challenging to achieve a narrow beamwidth while also suppressing subsidiary lobes. In this study, a novel approach is proposed to address this tradeoff successfully. Through thorough evaluations and comparisons with established strategies, the method demonstrates superior performance. It achieves the lowest subsidiary lobes and the narrowest beamwidth compared to other techniques. Moreover, the proposed framework consistently maintains optimal fitness values and offers highly efficient solutions, surpassing basic and popular optimization approaches. By optimizing excitation amplitudes and positions, the method successfully solves the narrow beamwidth limitation without sacrificing low side lobe levels (SLL). The research demonstrates that the proposed approach, combining DMO and SCA, effectively addresses the beamwidth-SLL tradeoff, making it capable of handling a wide range of LAA application requirements without compromising beamwidth or SLL. Overall, this study presents a significant advancement in LAA design, offering a novel variant of the DMO algorithm incorporating SCA, with improved performance and the potential for real-time linear antenna array applications.},
	keywords = {LAA; SLL; DMO; FNBW; IDMO},
	year = {2023},
	eissn = {1572-9451}
}

@article{MTMT:34319703,
	title = {A hybrid dynamic aggregation and fragmentation cognitive channel allocation model for mobile communication},
	url = {https://m2.mtmt.hu/api/publication/34319703},
	author = {Singh, Sunil Kumar and Mishra, Mangala Prasad and Vidyarthi, Deo Prakash},
	doi = {10.1007/s11235-023-01060},
	journal-iso = {TELECOMMUN SYST},
	journal = {TELECOMMUNICATION SYSTEMS},
	unique-id = {34319703},
	issn = {1018-4864},
	abstract = {Cognitive Radio is playing a crucial role to enhance radio spectrum utilization by applying various techniques for real-time and non-real-time services. In this work, we have proposed an aggregation and fragmentation of bandwidth-based channel allocation model which uses the Cognitive Radio concept to allocate the channels effectively. In the model, services are categorized into four heterogeneous classes. Of this, Primary new and Primary handoff services are of real-time in nature while Secondary new and Secondary handoff services are of non-real-time in nature. The network is also categorized into two: fixed network and dynamic network categories to enhance the spectrum utilization and to minimize the call block and call drop. Performance analysis, along with the comparative results, exhibit the effectiveness of the proposed model.},
	keywords = {Handover; Cognitive radio; channel aggregation; Channel selection; Channel fragmentation},
	year = {2023},
	eissn = {1572-9451}
}

@article{MTMT:34245705,
	title = {An extension of Cover-Chiang work on point to point channel to less noisy broadcast channel and analysis of the receivers cognition impacts},
	url = {https://m2.mtmt.hu/api/publication/34245705},
	author = {Pakravan, Saeid and Hodtani, Ghosheh Abed},
	doi = {10.1007/s11235-023-01056-8},
	journal-iso = {TELECOMMUN SYST},
	journal = {TELECOMMUNICATION SYSTEMS},
	unique-id = {34245705},
	issn = {1018-4864},
	abstract = {Information-theoretic analysis of the communication systems performances is of practical and theoretical importance. In this paper, (i) Specifically, we generalize the Cover-Chiang work on point to point channel with two-sided state information to two-receiver less noisy broadcast channel (2R-LN-BC) with different side information non-causally known at the encoder as well as the decoders, and obtain the capacity region including the previous works as its special cases. Then, (ii) the obtained result is expanded to the continuous alphabet Gaussian version. In this Gaussian version, the side information available at the receivers are supposed to be correlated on the channel noises and the impact of these receivers cognition of the noises on the capacity region is analyzed.},
	keywords = {Side information; capacity region; Less noisy broadcast channel; Side information correlated on the noises},
	year = {2023},
	eissn = {1572-9451}
}