Article: Implementation of 16-QAM OFDM for TV white space spectrum efficiency gain in AWGN channel Journal: International Journal of Wireless and Mobile Computing (IJWMC) 2025 Vol.28 No.3 pp.245 - 256 Abstract: Wireless communication has grown tremendously in recent years, impacting nearly every feature of our lives. The increased exigency for wireless broadband services leads to a huge demand for dynamic spectrum access, such as TV White Spaces (TVWS). The possibility of interference increases with the high density of users, reducing the Spectrum Efficiency (SE). SE improvement techniques have been utilised to resolve network congestion issues. This paper presents the Orthogonal Frequency Division Multiplexing (OFDM) wireless communication model with the Quadrature Amplitude Modulation (16-QAM) technique for TVWS SE gain. The performance analysis of the proposed model is based on parameters such as Packet Loss, Bit Error Rate (BER) and Signal-to-Noise Ratio (SNR). The constellation diagrams and signal trajectories are used to evaluate the efficacy of the modulation technique. Zero packet loss is achieved by implementing the 16-QAM OFDM, demonstrating efficient usage of TVWS with extended coverage and almost homogeneous data distributions. Inderscience Publishers - linking academia, business and industry through research

Title: Implementation of 16-QAM OFDM for TV white space spectrum efficiency gain in AWGN channel

Authors: Khola Azhar; Muhammad Omar; Muhammad Usman; Saad Saleem Khan; Stephen Larkin

Addresses: Electrical Engineering Department, University of Engineering and Technology, Taxila, Punjab, Pakistan ' Department of Electrical Engineering, United Arab Emirates University, Al Ain, UAE ' Department of Electrical Engineering, National University of Computer and Emerging Sciences, Islamabad, Pakistan ' Department of Electrical Engineering, United Arab Emirates University, Al Ain, UAE ' Africa New Energies, London, England, UK

Abstract: Wireless communication has grown tremendously in recent years, impacting nearly every feature of our lives. The increased exigency for wireless broadband services leads to a huge demand for dynamic spectrum access, such as TV White Spaces (TVWS). The possibility of interference increases with the high density of users, reducing the Spectrum Efficiency (SE). SE improvement techniques have been utilised to resolve network congestion issues. This paper presents the Orthogonal Frequency Division Multiplexing (OFDM) wireless communication model with the Quadrature Amplitude Modulation (16-QAM) technique for TVWS SE gain. The performance analysis of the proposed model is based on parameters such as Packet Loss, Bit Error Rate (BER) and Signal-to-Noise Ratio (SNR). The constellation diagrams and signal trajectories are used to evaluate the efficacy of the modulation technique. Zero packet loss is achieved by implementing the 16-QAM OFDM, demonstrating efficient usage of TVWS with extended coverage and almost homogeneous data distributions.

Keywords: TVWS; OFDM; 16-QAM; bit-error rate; packet loss; AWGN; spectral efficiency.

DOI: 10.1504/IJWMC.2025.145474

International Journal of Wireless and Mobile Computing, 2025 Vol.28 No.3, pp.245 - 256

Received: 28 Mar 2023
Accepted: 01 Mar 2024
Published online: 01 Apr 2025 *

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Title: Implementation of 16-QAM OFDM for TV white space spectrum efficiency gain in AWGN channel

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