To support Internet of Things (IoT) applications, next-generation networks are envisioned to provide both sensing functionality and low-power communications. This letter investigates the impact of co-channel interference (CCI) on a multi-user intelligent reconfigurable surface (IRS)-assisted non-orthogonal multiple access (NOMA) system with integrated sensing and backscatter communication (ISABC). Taking into account the effects of CCI signals on the communication users and the sensing receiver, as well as error propagation in successive interference cancellation (SIC), new closed-form expressions for communication performance, including ergodic rate, and sensing performance, including the probabilities of false alarm and detection, are developed. The analytical results are validated through Monte Carlo simulations. Numerical results demonstrate that CCI degrades both communication and sensing performance, which can be alleviated by increasing the number of reflecting elements and collected samples. Moreover, to gain deeper insights, asymptotic analysis is also obtained to evaluate the system performance. The effects of imperfect SIC and backscattered signals on the communication rate are also analyzed.
Abdulkarim Al Hanif, K. Altuwairgi, K. Hamdi· IEEE Wireless Communications...· 0 citations
This paper investigates a solar-aware trajectory optimization for unmanned aerial vehicles (UAVs) deployed in Internet of Things (IoT) networks for environmental monitoring. We develop a comprehensive energy consumption model that integrates aerodynamic flight dynamics with solar energy harvesting under realistic conditions. Building on this model, we formulate a trajectory optimization problem that considers UAV flight path, velocity, and energy dynamics to maximize reliable data collection and transmission throughput. The problem is inherently non-convex due to probabilistic constraints, energy harvesting non-linearities, and mobility restrictions. To overcome these challenges, we propose a successive convex approximation framework that reformulates the problem into tractable convex subproblems, which are solved iteratively with guaranteed convergence. Simulation results across diverse IoT deployment scenarios demonstrate that the proposed design substantially enhances UAV endurance, energy efficiency, and data throughput compared to benchmark approaches. The results show that solar-powered UAV communications are effective for large-scale IoT networks and contribute to more sustainable, reliable airborne sensing systems.
Hanan Aljehani, Abdelhamid Salem, K. Hamdi· International Mediterranean...· 0 citations
We use cookies to run the site and, with your consent, for analytics and to show ads.
See our Cookie Policy.
