Faculty Publications
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Item Lagrange's multiplier based resource management for energy efficient D2D communication in 5G networks(Springer, 2023) Pandey, K.; Arya, R.; Kumar, S.Device to device communication is the predominantly renowned trait for the 5G network and IoT applications. In the work, proposed novel joint low power/energy efficient resource allocation with mode selection for the D2D communication underlay in-band with transmit power, interference, data rate constraints are investigated with formulation of a novel problem which integrates the three major modules (resource management, mode selection, and power management) of D2D communication into one. To achieve the low power/energy efficient resource allocation with mode selection, we formulate novel optimization problem with objective of maximizing the energy efficiency using the subtractive form method to solve fractional objective function and form an iterative algorithm. The formulated fractional optimization problem is transformed into min–max problem and solved by the Lagrange dual function with low transmit power, interference, data rate constraints as a lagrange multipliers via an iterative process to achieve the optimal low power. Numerical analysis exemplifies and validates the optimal low power and the energy efficient characteristics of the novel proposed algorithm with all constraints to ensure the quality of the communication for the D2D communication, 5G, and IoT applications with the industrial need of low power/energy efficient devices to promote the conservation of energy and green communication. © 2021, The Society for Reliability Engineering, Quality and Operations Management (SREQOM), India and The Division of Operation and Maintenance, Lulea University of Technology, Sweden.Item Microwave Photonics Based Millimeter-Wave Signal Generation Technique for 5G Systems(Institute of Electrical and Electronics Engineers Inc., 2024) Meena, K.S.R.; Singh, M.We report a novel millimeter-wave (mm-wave) signal generation scheme with microwave photonics (MWP) technology for advanced 5G optical links. This work combines two parallel Mach Zehnder modulators with a series Mach Zehnder modulator for better tunability and efficient bandwidth. The experiments confirm a 35-GHz mm-wave signal of highest power and a 60-GHz mm-wave of lowest power from a 15-GHz electrical drive input signal. The optical sideband suppression ratio (OSSR) and the radio frequency sideband suppression ratio (RFSSR) over a 0.5-km standard single-mode fiber link are 27 and 66 dBm, respectively. The harmonic suppression is also studied with modulation depth (m) and filter attenuation (a) parameters. The system s performance is evaluated in terms of eye patterns, quality factor ( Q), output power spectrum, and margin. In addition, the suggested photonic link plays a crucial role in developing 5G communication systems for generating high-frequency, ultrafast speed, and low-noise mm-wave signals © 1963-2012 IEEE.