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Öğe A survey of symbiotic radio: Methodologies, applications, and future directions(MDPI, 2023) Janjua, Muhammad Bilal; Arslan, HüseyinThe sixth generation (6G) wireless technology aims to achieve global connectivity with environmentally sustainable networks to improve the overall quality of life. The driving force behind these networks is the rapid evolution of the Internet of Things (IoT), which has led to a proliferation of wireless applications across various domains through the massive deployment of IoT devices. The major challenge is to support these devices with limited radio spectrum and energy-efficient communication. Symbiotic radio (SRad) technology is a promising solution that enables cooperative resource-sharing among radio systems through symbiotic relationships. By fostering mutualistic and competitive resource sharing, SRad technology enables the achievement of both common and individual objectives among the different systems. It is a cutting-edge approach that allows for the creation of new paradigms and efficient resource sharing and management. In this article, we present a detailed survey of SRad with the goal of offering valuable insights for future research and applications. To achieve this, we delve into the fundamental concepts of SRad technology, including radio symbiosis and its symbiotic relationships for coexistence and resource sharing among radio systems. We then review the state-of-the-art methodologies in-depth and introduce potential applications. Finally, we identify and discuss the open challenges and future research directions in this field.Öğe Beam selection for ambient backscatter communication in beamspace mmWave symbiotic radio(Institute of Electrical and Electronics Engineers Inc., 2023) Janjua, Muhammad Bilal; Abbas, Hasan Tahir; Qaraqe, Khalid A.; Arslan, HüseyinThe Internet of Things revolution has profoundly impacted wireless communication systems. Access to high data rates is now just as important as low power operation. The use of incident millimeter-wave (mmWave) signals for ambient backscatter communication (AmBC) has shown significant promise for delivering high data rates. However, due to channel sparsity, incident signal availability to backscatter devices (BDs) at mmWave is erratic. In order to address the incident signal inaccessibility problem and enable high data-rate AmBC, this letter presents an efficient beam selection method in the beamspace millimeter-wave symbiotic radio system. The proposed method improves the overall system's sum-rate performance by up to 30% while ensuring signal accessibility to BDs.Öğe Improving connectivity via multi-user scheduling in 5G and beyond networks(IEEE - Institute of Electrical and Electronics Engineers, Inc, 2021) Salman, Hanadi; Janjua, Muhammad Bilal; Arslan, HüseyinIn this paper, a novel, yet efficient, multi-user scheduling scheme based on mode selection and power allocation is presented for 5G and beyond networks. The proposed scheme schedules the users in co-existence (CE) and non coexistence (NCE) modes to maximize the connectivity under signal separability and reliability constraints. In addition, two multi-user scheduling mechanisms; check requirements before scheduling (CRBS) and check requirements after scheduling (CRAS), are proposed for practical scenarios to study the impact of quality of service (QoS) on multi-user scheduling in terms of users' reliability requirements. Analytical results show that CRBS outperforms CRAS and orthogonal multiple access (OMA) schemes in terms of connectivity and system throughput with a complexity trade-off.Öğe Power-efficient time-domain scheduling for isac beamforming(2024) Memişoğlu, Ebubekir; Janjua, Muhammad Bilal; Arslan, HüseyinPower efficiency is a critical metric for a sustainable 6G network. The emergence of integrated sensing and communication (ISAC) services leads to significant power consumption due to additional signal transmission for sensing. An ISAC beamforming is an efficient transmission method for reducing power consumption in mmWave multi-input multi-output (MIMO) systems while meeting the requirements of communication users (CUs) and sensing users (SUs). This approach is only feasible when both users are within the coverage of the same beam. Otherwise, separate beams are required which results in high power consumption. In this letter, we propose a novel time-domain scheduling method for ISAC beamforming to achieve high-power efficiency. The performance gains compared to conventional scheduling method are demonstrated for the different number of users, periodicity values, and user distribution ratios.Öğe Quantum laboratory setup for future wireless communication systems(American Institute of Physics Inc., 2019) Solaija, Muhammad Sohaib J.; Janjua, Muhammad Bilal; Afeef, Liza; Tusha, Armed; Duranay, Ahmet Enes; Arslan, Hüseyin; Hasekio?lu, OrkunFifth generation of wireless communication envisages a diverse network that imposes stringent requirements regarding capacity, reliability, security, latency and seamless connectivity. These lofty goals have driven researchers to look for technologies capable of supporting conventional methods. Application of quantum mechanics to the domain of communications has been considered for a while now but the reliance of any quantum phenomena on experimental verification remains an obstacle in its widespread use. To serve this purpose, we propose establishing a quantum optics laboratory in Turkey which will allow implementation, analysis and investigation of the various promising quantum communication tools. This work is directed towards description and experimental verification of some well-known quantum experiments, from relatively simpler ones such as single or entangled photon generation to the more evolved experiments like quantum random number generation and quantum key distribution.Öğe Secure pilot allocation for integrated sensing and communication(Institute of Electrical and Electronics Engineers Inc., 2022) Janjua, Muhammad Bilal; Memisoglu, Ebubekir; Qaraqe, Khalid A.; Arslan, HüseyinSensing and physical layer security are among the key features of sixth-generation wireless networks. New security issues are emerging due to the proliferation of integrated sensing and communication applications, particularly in human activity monitoring and environment imaging. One way to achieve sensing is utilizing the communication signals' channel state information (CSI), namely CSI-based sensing. A malicious node with access to pilot information can obtain CSI and perform sensing to get vital information about a target. Therefore, the pilot information must be secured to prevent the acquisition of CSI by a malicious node for secure sensing and communication. This paper proposes a secure pilot allocation method to conceal the pilot location information from malicious nodes while securing communication and sensing data. Additionally, an adaptive power allocation method is provided to overcome the performance deterioration that occurs during the receiver's pilot location detection. Finally, the proposed algorithms' performance gains are investigated, and insightful conclusions are drawn.Öğe User pairing and power allocation strategies for 3D VLC-NOMA systems(Institute of Electrical and Electronics Engineers Inc., 2020) Janjua, Muhammad Bilal; da Costa, Daniel Benevides; Arslan, HüseyinIn this letter, we propose two novel, yet efficient, user pairing schemes for non-orthogonal multiple access (NOMA) in 3D visible light communication (VLC). Our analysis is carried out assuming different heights for the users & x2019; location as well as two dynamic power allocation strategies. Performance gains are attained when compared the proposed schemes with NOMA without user pairing and with orthogonal multiple access (OMA). The effects of the key system parameters on the overall performance are investigated and insightful discussions are drawn.
