Yazar "Albreem, Mahmoud A." seçeneğine göre listele

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    Data detection in decentralized and distributed massive MIMO networks
    (Elsevier, 2022) Albreem, Mahmoud A.; Alhabbash, Alaa; Abu-Hudrouss, Ammar M.; Almohamad, Tarik Adnan
    In order to meet the user demands in performance and quality of services (QoS) for beyond fifth generation (B5G) communication systems, research on decentralized and distributed massive multiple-input multiple output (M-MIMO) is initiated. Data detection techniques are playing a crucial role in realization and implementation of M-MIMO networks. Although most of detection techniques were proposed for centralized M-MIMO, there is a notable trend to propose efficient detection techniques for decentralized and distributed M-MIMO networks. This paper aims to provide insights on data detection techniques for decentralized and distributed M-MIMO to generalists of wireless communications. We garner the detection techniques for decentralized and distributed M-MIMO and present their performance, computational complexity, throughput, and latency so that a reader can find a distinction between different algorithms from a wider range of solutions. We present the detection techniques based on the following architectures: decentralized baseband processing (DBP), feedforward fully decentralized (FD), and feedforward partially decentralized (PD), FD based on coordinate descent (FD-CD), and FD based on recursive methods. In addition, the role of expectation propagation algorithm (EPA) in decentralized architectures is comprehensively reviewed. In each section, we also discuss the pros, cons, throughput, latency, performance, and complexity profile of each detector and related implementations. Moreover, the energy efficiency of several decentralized M-MIMO architectures is also illustrated. The cell-free M-MIMO (CF-M-MIMO) architecture is discussed with an overview of deployed detection schemes. This paper also illustrates the challenges and future research directions in decentralized and distributed M-MIMO networks.
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    Design and Comparative Analysis of a Microstrip Patch Antenna With Different Feed Technique at 2.4 GHz for Wireless Applications
    (Institute of Electrical and Electronics Engineers (IEEE), 2024-12-17) Hanashi, Salem Mohamed Al; Almohamad, Tarik Adnan; Aladwani, Azam Isam; Aziz, Ahlem; Guneser, Muhammet Tahir; Albreem, Mahmoud A.
    Nowadays, according to the wireless application's requirements, which grow very fast, the antenna designs must enhance their output parameters to be compatible with the new generation's demand and to have the advantages of being less weight, low cost and highly reliable. In this paper, we present the design and analysis of a Microstrip Patch Antenna (MPA) with different feeding techniques with the same parameters at 2.4 GHz for the applications of wireless communications, the CST 2020 software was used for antenna simulation, and the comparison was made among Microstrip Patch (MP) Antenna with Inset feed line and else with coaxial feeding. The results show that The MPA fed by a coaxial probe yields superior performance in the standing of return loss, bandwidth, and Voltage Standing Wave Ratio (VSWR) compared to the antenna utilizing an inset feed line.